What a strange day

Discussion in 'UK Motorcycles' started by SIRPip, Oct 7, 2010.

  1. SIRPip

    SIRPip Guest

    Had a strange urge today. Acting on it, I de-scarecrowed the Ural
    combo and set to fettling the damn thing, then booked the test. Really
    set to with the fettling then, as instead of the expected "Drop it
    round in a week, mate" I got a "Three o'clock this afternoon, OK?" at
    midday.

    15 miles away (the nearest place that would test a combo) which would
    be the longest trip I'd undertaken on the Ural. It was running, but
    not overly well, so I aimed for a 2 o'clock departure and spent the
    following two hours running out of time.

    Amongst other things, the oil was way too high on the dipstick (!) and
    smelled strongly of petrol (!!) so I changed it. Looking in the book,
    the "European equivalents" of proper Soviet oil were Shell and Esso
    brands that disappeared in the '70s, so it got half a gallon of good
    old Morris 10/40 semi-synth that everything else runs on and I always
    keep in stock.

    Sorted the disconnected horn, tapped the tail light to make it work,
    pumped all the tyres up (including the sadly flat spare) tightened the
    right mirror up and de-cobwebbed the exhausts and we were good to go
    with crossed fingers akimbo.

    Right off, the fucker decided it wasn't going to idle and the neutral
    light came on and refused to go off. Neither did it want to pull away
    at the end of the street and then I rode the chair wheel over the kerb
    - so that was the first half-mile.

    Trundled up the bypass at a princely 40mph in third gear - changed into
    fourth and it slowed down, so back down and give it half a handful -
    full throttle and it stuttered and slowed, but I was on a mission,
    albeit a bit of a slow one and I had time to get there, not to go home
    and fix the thing. Toes crossed in addition to the already aching
    fingers and we plugged along the first four miles.

    Dodged the traffic through Flitwick with only a minor heart failure
    when the dim tart in front decided that although the oncoming artic had
    flashed her through the narrow gap ahead, and then pulled in ... she'd
    stand on it and stop to let him through. SS Ural's stopping distance
    would have been measured in a few metres more than a back bumper, so a
    good handful of right rudder was applied as well as a damned good
    footful of back brake and we slewed across the road in fine style,
    heading through a gap in the parked cars across the road, for a
    convenient driveway.

    Chugging backwards (in reverse, of course) and feeling glad for the
    dark visor, the twin stripes of Russian rubber across the road looked
    rather impressive if I say so myself, as they unrolled from the front
    of the combo.

    Back on the road and facing the right way, the bastard shamed itself
    and cut dead, with restart a seemingly faint option. Several prods of
    the button and gladder still for the dark visor, it creaked into life
    again and off we slugged.

    With great delight we delayed a BT Land Rover by keeping him to the
    limit through the next 40mph stretch, but he expressed his disgust by
    insisting on overtaking round the outside of a bend in the NSL and
    having to swerve sharply back to avoid being Norbert Dentressangle's
    lunch. I caught him up at the lights over Junction 12, anyway - he
    needed a dark visor too, or perhaps he'd caught the sun a bit this
    morning.

    Plenty of revs and a bit of clutch slip and we were away at the second
    time of asking - through the first set of lights anyway, but stalled
    and failed at the second. Bugger. Managed at the next opportunity and
    we were fully commited by then, there was no going back ... just
    Toddinton to get through and then the long, glorious downhill section
    .... with a sharpish left hander at the bottom.

    We waved the chair wheel at the oncoming traffic as I leaned across the
    chair to little avail, but got down onto the flat straightish bit in
    one piece, just a little lighter and with a freshly tightened sphincter.

    Slogged up the hill into Houghton Regis at a steady 30, caught the
    lights and hit the main drag. A sad failure at the next set of double
    lights, when the flame guttered and died and I really thought that was
    it. Starter churning, I fed the clutch in gently and we eased up the
    kerb and across the path, to rest awhile on the grassy verge.

    Lid off, gloves off, fag on.

    Twisted the throttle, hit the tit in an idle moment, as ye do - and it
    clattered back into life again. Shit. It still patently couldn't be
    trusted to idle, so I gloved, spat fag and lidded while keeping the
    tickover up with my right boot on the twistgrip. Try doing that on
    your solo.

    It all went pretty smoothly after that, negotiated the One Way system
    and landed in the car park, even reversed into the "MOT only" space
    without incident. Google Streetview makes going to places you've never
    been sooo much easier.

    I'd only just got my gloves off and lid halfway beofre the testers were
    out of the building and asking questions. When responding to "Just
    down there at the bottom of the (impressively steep, short) ramp into
    the workshop where those people are standing" with "What, with these
    brakes?" didn't actually go down that well, so I put the po-face on.

    The testers were fascinated: one had never tested a combo before, the
    other "Not since 1968, Boy". A brief debate as to which class -
    motorcyle with sidecar or three-wheeler over 400 Kilograms - took place
    with the obvious Class 2 answer being the correct one - it isn't a
    trike.

    Much hilarity occurred when asked for the horn, as it managed a very
    brief canary impersonation before falling ominously silent - in one of
    those deathly silent ways. Still, sliding off and peering revealed a
    dangling pink wire, with a connector matching the naked one on the horn
    - slip it on, slide back on, hit the tit and ... canary squeaking
    again. Much hilarity. Joy.

    I had to nip round to the office and pay then, so missed the actual
    test, but returned in time to find the outfit facing the opposite way
    as they manoeuvred the chair wheel onto the rollers. FAIL. Nothing
    showing at all. It is a bit awkward you know, having to explain to a
    tester that the chair wheel isn't actually braked: yes, it has a brake
    drum on it, as it is identical to the wheels on the bike - but no,
    there's no actuating mechanism. Yes, some of them do have working
    chair brakes (it even mentions it in the Pidgin manual) but <ahem> not
    this model <ahem>

    Fighting their way through the bullshit miasma, they jockeyed the thing
    round the otehr way and dropped the rear wheel in the rollers. I saw
    fit to attest to the efficiency of the brakes, vis-a-vis the twin lines
    on the tarmac in Flitwick, but forbore to mention the binary character
    of said oval-drummed contraptions. They found out anyway, as the thing
    positively leapt backwards off the rollers on application of the rear
    brake, damn near saving the younger tester a trip to Thailand in the
    future as the spare-wheel-mounted luggage rack on the chair caught him
    square in the nadgers.

    Oh, how we laughed - well, two out of the three of us, anyway.

    Once he'd uncurled himself, we carried on with the front brake (which
    has always required a mansized squeeze IYSWIM). The wiry guy on the
    bike was apparently equal to the task, as the already nadgerbashed chap
    was pinned neatly between the loop on the front mudguard and the
    beamsetter for several seconds before we could stop laughing for long
    enough to pull the bike back into the rollers.

    I think he was examining the tyre tread depth from ground level - well,
    it looked like it as he'd coiled up around the front wheel very closely
    once the beamsetter released him. I didn't laugh - well, not out loud
    and certainly not till I'd got outside and had a fag on round the
    corner.

    They kept me waiting for ages after that, much muttering in their
    office interspersed with little trips back out to the Ural, squeezing
    levers and bouncing the (recently cleaned off, thank you *very* much)
    suspension. I explained the little wobbles and judders as being
    endemic to the rubber-mounted steel chair.

    Eventually they reappeared, saving me from an Inquisition by a 60yo R1
    rider who "Just got away with a 100mph undertake on an unmarked
    Plodmobile by saying I was tired and wanted to get home" by presenting
    me with a beautiful pastel green pass certificate - which, by then,
    matched the shade of NadgerBoy's cheeks. Performed a lovely
    three-point turn to exit the workshop, using reverse gear of course,
    which caused spontaneous hilarity once more (except for NadgerBoy, who
    tried to laugh but appeared to have herniated hisself) and made a sharp
    exit.


    In comparison with the outbound trip, going home was much less
    eventful, perhaps because there was no deadline, perhaps the pristine
    pass chitty helped. There was just one incident, when a High Street
    stopped to let a bimbo manouevre her Chelsea Tractor, so we filtered
    down the outside and around, to find a Pedlemming about to leap into
    the road. A severe and prolonged canarying was administered, and I
    doubt he'll be doing that for a while. (He's prolly still laughing).

    By the time I got home, I was pretty convinced that the reason for the
    lack of GO was that the thing was running as a 325cc single - the right
    pot was off. The fuel filters which I recall fitting not very many km
    ago were pretty blackened and not transparent any more, so I set out to
    get the tax disc and a pair of filters.


    Don't you sit down low in a car - and aren't they quiet - and FAST?


    Having legalised the beastly thing, I whipped the right filter off (for
    those not familiar with the layout, there's a couple of flat pots in
    front of your feet and the carbs sit directly above your feet with a
    fuel line and inline filter each) and discovered - nothing. No (or
    very little) fuel in the filter and no fuel in the line. Tapping the
    end of the line coaxed forth the expected trickle however, so I slipped
    the filter on and let it fill up. Repeated with the left side (which
    had a deal more fuel and a load of flakes of rust and paint, and a bit
    of water in it) and watched that one fill up as well.

    Started it up and it sounded like a different bike. Well, it was a
    different bike, it was a 650 twin and not a 325 single, innit. Sat and
    revved it and watched the pipes warm up, the fuel in the filters
    vibrate and slowly gurgel away, to be replaced from above. Game on -
    time for a fag, time for a road test.

    Lid and jacket on, we sallied forth for the second time today, but this
    time just for a jolly. Proper (for a Ural) acceleration, much fewer
    vibes, proper torques and everything. Until I changed into second, and
    it went off a bit. Hit a bump and it came back, then as we got into
    NSL, it returned to erstwhile normality and wouldn't do more than 40.

    Did a couple of miles, then, as planned, turned around and stopped.
    Beat **** out of the right carb's float bowl in case the float was
    stuck or the float needle valve needed reseating and watched the filter
    fill up again. Hah! It even ticked over for long enough to get gloves
    and lid on.

    Pulled away a treat again, then fell at the second gear hurdle - then
    chimed back in, then out, then roared into full effect at the apex of a
    left-handed tighter than 90 degree corner, causing the chair wheel to
    whip into the air and my sphincter to whip a bit more cloth in. Then
    back onto one for the straight, the bastard. There was a bit more
    coming and going, and a considerable amount of going better on 3/4
    throttle rather than when wound all the way around - and a few
    backfires.

    Back into the 30 limit in the village and it was still surging quite
    hard and stinking a bit. With backfires, too. Backed it into the
    driveway, dismounted and gave it a once-over ... and had to get Elly to
    come out with her camera to capture the right-hand silencer.

    http://www.flickr.com/photos/ellyukrm

    The pics are headed "Ural" and there's five of them.

    As you can see, there's a patch on the silencer that isn't shiny
    silvery chrome any more, it's a rainbow. The inside side (IYSWIM) away
    from the air flow was cherry red, and the inside of the tube was bright
    red - a yellowy, just about to melt red, actually. The bevel drive
    casing was way too hot to touch, too - spit sizzled off it like a very
    hot iron.

    WTF has caused that? Mixture too weak due to lack of fuel flow - or
    unburnt fuel going up just at that point? I've fucked about with a lot
    of motors, with varying numbers of wheels, but I've never to my
    knowledge damn-near melted a hole in an exhaust like that. Some ten
    minutes later, spit was still popping back off the silencer. That was
    *hot*.

    I'll be fitting known new plugs tomorrow, although the current
    incumbents are pretty new and give a decent spark and have the right
    gap. I'll also have a look at the points (that was the solution to the
    fucker not running for over a year, the electronic ignition has thrown
    a wobbly and would cut in and out at will (or, more specifically at me,
    when I was riding it)) and, I suppose, the timing if I can remember how
    to do it. I'll have words with the right carb too, and see if I can
    find the reason for the lack of fuel flow - but would anyone like to
    speculate as to the cause? Come on, all opinions welcome - and no, I
    can't hurl it off Beachy Head, Elly owns half the thing and not only
    that, it appears to be a local celebrity to boot.
     
    SIRPip, Oct 7, 2010
    #1
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  2. SIRPip

    Dentist Guest

    One of many gems chosen at random. Thank you.
    I would say so, you must have had a fair sized puddle of it in the
    silencer by then.
     
    Dentist, Oct 7, 2010
    #2
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  3. SIRPip

    SIRPip Guest

    I was very tempted to leave the scarecrow passenger in there, but as
    I'd not visited that particular MoT station before, I bottled it.
    I've not noticed an 'ole, but I'll have a damned good look at it
    tomorrow. The silencers are genuine Russian OEM, as evidenced by a)
    the shitty chrome; b) the Cyrillic lettering stamped into them and c)
    they don't even nearly fit: the tension they're under is respectable
    and that's likely why they supply hangers that are on the battleship
    side of massive. But no, no noticeable air leaks upstream.

    If it was a stroker, that silencer would be firmly in the 'decoked'
    pile by now.
    Not AFAIK, and there's only one fuel tap - and I sloshed a good couple
    of gallons of fresh unleaded in it this morning, to boot.
     
    SIRPip, Oct 7, 2010
    #3
  4. SIRPip

    SIRPip Guest

    NP. It was a strange and strangely amusing day.
    It must have been going like an acetylene torch. It wasn't like that
    at the terminus of my run up the road, so that happened in a couple of
    miles, that's all.
     
    SIRPip, Oct 7, 2010
    #4
  5. SIRPip

    Pip Luscher Guest

    I'd say that the nitrous valve isn't opening in sync with the turbo
    wastegate.

    Or something like that.
     
    Pip Luscher, Oct 7, 2010
    #5
  6. SIRPip

    Pete Fisher Guest

    T-piece to feed a line to each carb or a two spigot banjo on one with a
    link to the rendered always thirsty one? You can get away with the
    latter strategy on a 350 Morini, but a pot with as big a capacity each
    side might favour the nearer one IYSWIM.

    --
    +-------------------------------------------------------------------+
    | Pete Fisher at Home: |
    | Voxan Roadster Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
    | Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
    +-------------------------------------------------------------------+
     
    Pete Fisher, Oct 7, 2010
    #6
  7. SIRPip

    SIRPip Guest

    The single tap has two outlets: one straight down toward the left carb,
    with a higher-up takeoff going over the top of the motor down to the
    starved right carb. I'll have the tap off too, although Loz and I
    reamed it a while ago and it has been stripped since by my man in old
    BMWs who has had the thing all Summer, dicking about with it.

    I'll have a word with him, but he's always famously busy, like. He
    stripped and rebuilt the carbs, now I think about it - made all the
    gaskets by hand, before I could tell him there's a couple of rebuild
    sets in the boot of the chair.

    I'm pretty much convinced it's a fuel problem, but any minute now
    Champ'll trot out: "If you think it's fuel, it's always sparks ... "
    line that always turns out to be true.


    If it comes to it I'll make up a couple of Coke bottle emergency
    "tanks" and gaffer 'em to the sides of the tank, with straight-shot
    hoses into the carbs. That'll teach 'em.
     
    SIRPip, Oct 7, 2010
    #7
  8. SIRPip

    SIRPip Guest

    Elly says it would be nice if I could get the other side to match. I
    responded that one rainbow might not make a swallow, but two surely
    should. I think I'll sleep with the dog tonight.
     
    SIRPip, Oct 7, 2010
    #8
  9. SIRPip

    SIRPip Guest

    Y'know, that had just clean slipped my mind.
     
    SIRPip, Oct 7, 2010
    #9
  10. SIRPip

    crn Guest

    [snip entertaining tale]
    Shit in the carbs, shit in the filters, and most importantly shit in
    the tank and fucked tank tap strainers.

    Most likely the tank is well rusted on the inside and in serious need
    of the gravel and POR15 treatment
     
    crn, Oct 7, 2010
    #10
  11. SIRPip

    SIRPip Guest

    Ah - I'll check the timing, then.
     
    SIRPip, Oct 8, 2010
    #11
  12. SIRPip

    sweller Guest

    Does it use a two points system? It could be the timing on the RHS is
    wrong.

    I'd be inclined to go with air leak/weak fuel diagnosis.

    Is the float on RHS at the right height are the homemade gaskets actually
    working?

    Also, if someone has been working on it - In the past I've found closed
    up valve gaps can cause red pipes.
     
    sweller, Oct 8, 2010
    #12
  13. SIRPip

    Ace Guest

    LOL!
     
    Ace, Oct 8, 2010
    #13
  14. SIRPip

    Simon Wilson Guest

    I've never seen a silencer get that hot the either, except on a diesel
    genny that I had problems with earlier this year[1]. I've seen many a
    header pipe glowing due to weak mixture.

    [1]Silencer glowing red hot on the outside. That turned out to be a duff
    injector, no spray whatsoever, just a dribble.
     
    Simon Wilson, Oct 8, 2010
    #14
  15. SIRPip

    SIRPip Guest

    There's actually a considerable history with this thing: it was fine
    when we acquired it from Platy and Elly posed about on it with the boys
    passenging for quite a few miles, but turned a bit queer when I came to
    use it. It cut for no apparent reason at my mate's house and refused,
    point blank, to restart.

    I returned with Loz and an assortment of other tools, and guess what -
    started first prod. Ran fine, all the way to the first junction, then
    cut dead halfway across the main road. Deadsticked onto the verge,
    cranked to no avail - so with grins of glee, we descended upon it - and
    could find nothing wrong with it - then it fired up and ran sweetly
    without us having changed anything. Rinse and repeat five times in two
    miles.

    We got stuck into it at home and found the usual assortment of minor
    problems that, acting together, may have added up to a significant
    issue: the plugs were a bit grotty, the fuel tap was a bit gungy, the
    filters had seen better days and there was muck and wear to the carbs.
    All sorted out - one at a time - and test ridden - to have the thing
    start and run fine in the driveway and for 100 yards, then cut and
    refuse to restart until it had a rest for two to 20 minutes.

    I suspected the coil breaking down under load/when hot but my inductive
    tester showed a decent spark to be available, similarly there was
    always fuel in the pipes. Cleaned the tank, cleaned the air filter,
    changed the oil, fitted new exhausts (getting desperate now) and pumped
    the tyres up; all to no avail.

    Eventually this lad I know who loves old BMWs offered to sort it out
    and he found all sorts not quite right - valve clearances, carb
    maladjustment and wear, fuel tap, all sorts - but when sorted it still
    wasn't right. Turned out to be the (relatively highly bloody expensive
    at 120 quid) electronic ignition conversion. Took it back to the
    "Mixing Bowl of Doom" points and it all seemed to go away and behave
    itself.

    He still wasn't happy with it, as it would randomly fire up on one or
    the other and the other would chime in when it felt like it. He's been
    twitching about with it on an occasional basis for months. Now it's
    down to me.
    The spark could be sporadic if there's wear to the distibutor spindle,
    which the Russian item is known for. The rotor arm was a bit wobbly
    but has been sorted, but I'll likely have the distributor off and check
    it thoroughly. Sparks seem good - take a plug out and lay it on the
    pushrod tube and the sparks are easily visible in daylight. The thing
    always starts from cold, that's the thing. Prod, crank for a second,
    fire up. Difficult to tell initially whether on one or two until the
    header(s) warm(s) up or you try to pull away.

    I've had some very interesting experiences with (generally car)
    multi-pot inline engines where one carb or carb throat has decided it
    isn't playing and has added a blob of fuel every other revolution,
    leading to collector boxes getting a bit warm, but flame front
    behavious like that I can understand and explain - this hotspot is
    outside my current experience - unless there was exploding flame fronts
    that have caused a bit of steel woll-alike in the silencer to
    incandesce and keep the flame going. But up to more than red heat in a
    couple of miles?
    First port of call is float bowl off - easy to get at, being the outer
    carb. I assume the fuel delivery to be related to demand, in that if
    you pull the pipe but keep your finger over the end, the filter doesn't
    fill. Pop your finger off the pipe and a trickle of fuel appears and
    puts a cm of fuel into the filter in a second or two. As far as I
    could tell when riding the thing (bearing in mind the light wasn't
    good, I wasn't wearing specs and my tinted visor was only ajar) the
    fuel filter was as good as empty for most of the time.

    Second port of call will be new fuel pipes, to allow the right filter
    to lie at a similar angle to the left filter, making the fuel level
    more clearly visible. I still have some drain dye in the shed (doesn't
    everybody?) so I might run it on red petrol just to able to see the
    thing betterer.
    But fucking Russian, right?
    You can be sure of that.
     
    SIRPip, Oct 8, 2010
    #15
  16. SIRPip

    SIRPip Guest

    Single set, sadly.
    I'll have a look at that soonest. Horrible, grim morning ATM with poor
    light and claggy grey mist that sticks to everything. Not the time for
    open-air spannering unless one has to.
    I'll be attending to gap checking soonest - easy to do on these things,
    and I'm starting with the easy to get at stuff.

    I was so chuffed yesterday, what with nursing the thing all the way to
    MoT and back and not dying on the road, then diagnosing the cause of
    the singleness and then getting the thing onto two with the very
    minimum of effort - and then the comedy silencer as a bonus. I feel
    that I'm getting somewhere, but in the same way as your Jag engine:
    every solution is throwing up its own problem which will need sorting
    in turn. If I can just chase the problems down the exhaust and off
    into atmosphere I'll be well pleased.
     
    SIRPip, Oct 8, 2010
    #16
  17. x3
     
    The Older Gentleman, Oct 8, 2010
    #17
  18. SIRPip

    Pete Fisher Guest

    I should have factored in crude mechanical advance/retard mechanisms.
    That would do it. Don't some crude parking and camper van heaters run on
    petrol. If there was plenty of fuel a suitable substrate and initial
    ignition then it might get a hold. Add the forced air/fuel pulses down
    the pipe and it might reach critical mass.
    Heh, did I tell you about the time we turned a canal an interesting
    colour by over liberal use of Fluorescein (or was that you)?
    You will note the use of the word crude, twice.
    Excellent.

    --
    +-------------------------------------------------------------------+
    | Pete Fisher at Home: |
    | Voxan Roadster Yamaha WR250Z/Supermoto "Old Gimmer's Hillclimber" |
    | Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
    +-------------------------------------------------------------------+
     
    Pete Fisher, Oct 8, 2010
    #18
  19. SIRPip

    CT Guest

    Love it!
     
    CT, Oct 8, 2010
    #19
  20. SIRPip

    CT Guest

    Donate your half[1] to Elly, then it's *her* problem.


    [1] See? I'm being charitable already.
     
    CT, Oct 8, 2010
    #20
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