Update - ZZR600 chain clunking/back wheel squirming about

Well is dismantled the rear wheel and checked everything was correct
and took the bike for a spin and realised something I hadnt realised
before...... 1st, 2nd, 3rd gear all fine, 4th clunks about 5th,6 th
all ok!

So the culprit is 4th gear!

This would be a gearbox problem then :-(

Befoer I open her up, any ideas what could be causing this - I am
thinking maybe a chipped gear or damage to the spines on the input or
output shafts?

Cheers

 

Selector forks also a possibility.

Strange it happened around the tyre changing...

 

Isn't this always the way? I can give you 4 examples which happened to
me in the last year or so.

 

Oddly enough I can't give you any examples of bikes being fucked up by
tyre changing monkeys; over the last 25 or so years I've been pissing
around with bikes (gulp)

 

Newbie.

--
Krusty
www.MuddyStuff.co.uk
Off-Road Classifieds

'02 MV Senna '03 Tiger 955i '96 Tiger '79 Fantic Hiro 250

 

wrote:

I won't even attempt to claim that I'd be able to tell if they'd fucked
up. After riding on squared off rubber, riding on new tyres always
feels weird anyway.

 

I'd think you'd notice if the gearbox was fucked afterwards.

 

Relative to some, yes. In reality it's 28 years but that looked a bit
too, well, like an age rather than a measurement of time (IYSWIM).

 

A young lad at a local place refitted the CB250RS rear wheel in after
fitting a new tyre, he left out a small plate in the chain adjuster and
that caused the rear wheel to move to one side by a significant amount.
So bad was the handling of my 250RS that I didn't notice the missing
adjuster or the terrible wheel alignment until I removed the wheel
myself when the tyre wore out 6000 miles later.

Looking at the photos Entwisi posted, it's still wearing the same
Maxxis Barracuda front tyre that young lad fitted about 5 years ago.

 

I was thinking about this the other day. I got my FS1E on my 16th
birthday in 1978, but I'd been pissing about with bikes for a good 5
years prior to that. By the time I was 15 I could strip and rebuild my
mate's Fantic TI top end in under a couple of hours with the most basic
of tools, and had stripped and rebuilt a few C50 and C90 engines for
our field bikes.

 

I got my TL125 on my 6th birthday, & had stripped & rebuilt it by the
time I was 8, including respraying it in MV America colours. That makes
it around 36 years of fucking around with bikes.

--
Krusty
www.MuddyStuff.co.uk
Off-Road Classifieds

'02 MV Senna '03 Tiger 955i '96 Tiger '79 Fantic Hiro 250

 

No you misunderstand. Things *always* go wrong after whatever machine it is
has been attended to. I'm not saying the spanner monkey [1] fucks them up,
just that something often seems to happen.
Eg. Rear cylinder on the cage starts leaking when the brakes are tested at
the MOT - seemed perfectly ok beforehand. Couch on a radiotherapy treatment
machine jams 48 hours after I service it - turns out to be diarrhoeia [2] in
the bearings, delivered to said bearings 24 hours after the service. And so
on

[1] Including myself as an electronics maintenance bod.
[2] spelling?

--
Malc
R1100RS old and tatty

You laugh at me because I am different
I laugh at you because you are all the same

 

I should feckin' hope so. I remember removing head and barrel of my Why
Bother 100 with the standard toolkit, and putting it back, in hal that
time.

 

OK. Puch Maxi aged 18 (so this is 1976). Blew it up. Yam YB100 a couple
of months later. Utterly indestructible bike. It never, ever went wrong,
though I always carried a spare plug because it ate them.

Crashed it, oh God, loads of times. Into ditches. Into a milk tanker.
Threw it up the road on diesel. Rode it from Brighton to Oxford every
other weekend, to get my oats[1]. Fitted ace bars to it, because I
thought it made it look like a Jota (I can't believe I'm confessing
this).

Refitted the stock bars and added windscreen and panniers because I
thought it made it look like a Harley (the C50 tartan-pattern panniers
didn't help here).

[1] This has got to be told. Then girlfriend was a schoolgirl at
Headington School For Girls, outside Oxford. Posh place.

She had to get parental permission for a weekend pass out. Her parents,
unsurprisingly, being Baptist and she their only child, regarded me with
suspicion.

Her housemistress[2], who'd never married (the love of her life didn't
make it back from Dunkirk, apparently), knew exactly what was going on,
and marched her to the school doctor and had her put on the pill.

She then told me that if her parents vetoed the weekend pass out, so she
could join me in carnal bliss at Sussex University, then as
housemistress, she had an annex - a sort of granny flat - on the
premises, and I could come up to Headington and we could spend a weekend
of carnal bliss there. In the event, her parents (fools) granted the
weekend passes.

To this day, I'm still incredulous that some bluestocking stiff-neck old
lady, who was in charge of the educational and moral upbringing of a
hundred or so young girls, could actually collude at the deflowering of
one of her charges. I'm immensely proud that I managed to sway her
judgment in that direction[3].

[2] Miss Chiesman, you will never be forgotten. I am assuming you're
dead, by the way.

[3] One weekend when I went up to Headington, she was abed with the flu.
Knowing which side my bread was buttered, I took her a bottle of Bell's.
It did the trick, obviously.

 

We're talking about getting the piston out, cleaning up the scores on
the barrel and fitting a new piston/rings because the fucking thing had
nipped up again. We used to chip in a couple of quid each to hold a
spare piston/rings/circlips ready for the next seizure.

 

Bleeding Italian crap....

 

We were lucky, we had Coburn and Hughes a short hitch-hike away in
Luton. Pistons were plentiful.

 

Hmm. I can remember as a teenager dropping my DT125 and breaking the
gear-selection return spring stop. For some reason I felt (probably
erroneously, in retrospect) that the cases needed splitting in order
to drill it out and tap it.

Not having the requisite puller for the flywheel, My dad took it to a
backstreet garage to have the flywheel taken off. Unfortunately due to
a language problem (this was Hong Kong) the mechanic stripped the
entire engine and I was presented with a box of bits.

I made up a new gearshift stop on my Dat's hand-cranked lathe, fitted
it, then reassembled the engine as best I could given that it was my
first ever rebuild and I hadn't stripped it in the first place. There
were only a few bits left over and it ran! I did have the flywheel
spin on the crank later (the Woodruff key had sheared), which turned
out to be caiused by me fitting an insufficiently thick washer under
the retaining nut, but that was the only problem.