The innate hostility of inanimate objects

TMack says...

BMW

 

On Sun, 4 Mar 2007 09:53:35 +0000,

I used to make a bit of money on the side at work building up the
heads on the originals and machining them to a more user friendly
size.

 

Road crap? Road crap?

You don't mean to say that....people....rode them....in....the rain?

<faints>

 

The MZ 250s that were fitted with the Mikuni oil-pump also had it
driven from the gearbox; wise riders added 5ml of two-stroke oil to
each litre of petrol, which had the added value of prolonging the
life of the carburettor slide.

 

Kim Bolton says...

I've never had a significantly worn carb slide on any high mileage four
stroke, so that's a load of MZ owner's bollocks, unless they were so
badly made they needed a constant supply of lubricant.

 

Jawa Mustang with a transparent section in the nose of the fairing for the
headlight to shine through. Headlight mounted in the traditional place on
the front forks, turns independently of the fairing...

--
platypus

"Merely corroborative detail, intended to
give artistic verisimilitude to an otherwise
bald and unconvincing narrative.”

 

I'd forgotten that one. Anmd the fairing was painted in metalflake
purple. Gotta love the 1970s.

 

<points at GL1500>

Take your pick.
--
| ___ Salad Dodger
|/ \
_/_____\_ GL1500SEV/CBR1100XXX/CBX1000Z
|_\_____/_| ..88045../..23727.../..31893.
(>|_|_|<) TPPFATUICG#7 DIAABTCOD#9 WG*
|__|_|__| BOTAFOT #70 BOTAFOF #09 PM#5
\ |^| / IbW#0 & KotIbW# BotTOS#6 GP#4
\|^|/ ANORAK#17 IbB#4 YTC#4 two#11
'^' RBR Clues: 00 Pts:0000 Miles:0000

 

Where's Nigel's sig when you need it?

 

Or any feature of any bike with Jawa on the tank. But that fairing was a
classic.

--
Rich
==============================

2001 Disco II ES auto
1971 S2a 88" petrol
2006 Bandit 1200S

Take out the obvious to email me.

 

I take it you aren't that familiar with the quality of the materials
that MZ were forced to work with. Besides, the carburettor slide in a
piston-ported two-stroke sees a very different pressure-pulse profile
than a that of a four-stroke.

 

Kim Bolton says...

The old MZs I've seen and worked on have been quite impressive
considering the limited resources they had to hand. I don't for a minute
think that the carb slides would have worn badly if not given that extra
dollop of 2-stroke oil.

The materials used to make Japanese carbs are very lightweight and
cheap, almost pitful in their nastiness, but I've never seen one that's
got a significantly worn slide. Most Jap strokers from about 1967
onwards had some sort of oil injection that fed forwards of the carb
into the cases, I've never seen a badly worn slide on any of those
either and they're subject to the same pressure-pulse profiles as MZs.

I think the idea of putting an extra 5ml of oil per litre of fuel in the
tank is overkill. If anything you'd be leaning off the fuel/air mixture
a touch making it more prone to seizure unless you rejetted to suit.

 

In communiqué <>, Rich B

Even Jawa speedway bikes?

--

+-------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Gilera Nordwest Yamaha WR250Z |
| Gilera GFR Moto Morini 2C/375 |
+-------------------------------------------------------------+

 

Perhaps it is for aromatherapy reasons.

<fond memories of putting a teaspoon of 'R' in to the G2 tank in my
youth for that authentic whiff of the shale[1] oval>

[1] not cinders - I'm not *that* old.
--

+-------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Gilera Nordwest Yamaha WR250Z |
| Gilera GFR Moto Morini 2C/375 |
+-------------------------------------------------------------+

 

Up to and including the RG250 -- my first race at Westwood cost me
over $600 for a new crank because I'd stalled the engine braking into the
hairpin, and was givving it 11K-rpm beans to get moving again up the hill
(after restarting by dumping the clutch). It seized just as I realised it
must have been in 2nd rather than 1st...

--
Ivan Reid, School of Engineering & Design, _____________ CMS Collaboration,
Brunel University. Ivan.Reid@[brunel.ac.uk|cern.ch] Room 40-1-B12, CERN
GSX600F, RG250WD "You Porsche. Me pass!" DoD #484 JKLO#003, 005
WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
KotPT -- "for stupidity above and beyond the call of duty".

 

Oh, I agree; the engineering design was good, it's just that East
German metallurgy wasn't always up to the task. There are persistent
rumours of front-fork clamps and clutch/brake levers fracturing in
conditions where that would be unexpected.

The BVF carburettor has a reputation for a high wear-rate.

At 5 ml per 1000 I 'll take a bet that the weakening effect is less
than one main-jet size or one notch on the needle.

 

OK, no - but the two-strokes were a total fucking abomination. I see
they're using Rotax singles these days, which bodes well, but after owning
one (a 634) I just couldn't.

--
Rich
==============================

2001 Disco II ES auto
1971 S2a 88" petrol
2006 Bandit 1200S

Take out the obvious to email me.

 

Having to remove a whole engine just to get at an alternator? VN750 btw.


--
Beav

VN 750
Zed 1000
OMF# 19

 

GoldWing too.

--
platypus

"Merely corroborative detail, intended to
give artistic verisimilitude to an otherwise
bald and unconvincing narrative.”

 

Pish-tosh.
--
| ___ Salad Dodger
|/ \
_/_____\_ GL1500SEV/CBR1100XXX/CBX1000Z
|_\_____/_| ..88045../..23727.../..31893.
(>|_|_|<) TPPFATUICG#7 DIAABTCOD#9 WG*
|__|_|__| BOTAFOT #70 BOTAFOF #09 PM#5
\ |^| / IbW#0 & KotIbW# BotTOS#6 GP#4
\|^|/ ANORAK#17 IbB#4 YTC#4 two#11
'^' RBR Clues: 00 Pts:0000 Miles:0000