Triumphrat

davsato · 11-26-2006, 12:11 PM

955i ST, about 12k miles on the clock
i get a clonking noise as i let out the clutch and pull away in 1st. you can also feel it through the pegs, it doesnt do it in other gears, only happens when i slow to a stop using engine braking, so ive got a bit of play in my drive train somewhere.
i thought it was the chain so ive just done a chain/sprocket change, its all new and adjusted properly but still clonks.

any ideas? do the cush drive rubbers go this early?

amanger · 11-26-2006, 04:32 PM

Have you checked the rear wheel bearings?They are known to wear out fairly quickly.

:???:

PaloAlto · 11-26-2006, 07:09 PM

Dave,

A low probability item is the rear brake calipers. They should have very slight forward/rearward play in them allowed by a pin in a slot. But I think there have been a few reports of something going awry and the calipers having way too much movement. Admittedly, this doesn't correlate with the clonk occurring only after engine braking - OTOH, if this occurs only when you don't use the rear brake, maybe there is a correlation.

Bern

StevyR · 11-27-2006, 02:02 PM

Has the rear wheel become loose on the centre, try loosening the centre nut and re-torque. I experienced exactly this once, just one clonk as you take up the drive. It may help to clean the cone and wheel seat in case there is a trace of grease. Best of luck

davsato · 11-27-2006, 03:56 PM

thanks for the help fellas,
wheel/hub bearings fine
brake caliper fine
chain/sprocks fine

with a mate on the ground and me pulling away next to him to trace the noise we came up with two possibles;
1/ the chain was slightly baggy (pilot error) and slapping the underside of the swingarm, easily remedied but not today, so watch this space,
2/ the cush drive maybe slightly loose, in 1st gear with the bike on the ground and the rear brake on hard, i brought the clutch in as hard as i could without stalling and there was some play in the cush, perhaps 1/2", i dont know how much play there should be but thats less then some bikes ive had, can anyone tell me? its not sloppy, i cant move the hub around against the brake by hand

i will let you know tomorrow what effect the chain tightening had :???:

DaveM · 11-27-2006, 05:45 PM

davsato,
or if it's not that you may have accidently hopped on a Ducati by mistake and that would explain all the loud noises! :-D :-D :-D

Sorry mate I couldn't resist that.

Seriously I hope it is a minor issue you can fix easily and cheaply good luck.

Davem

davsato · 11-28-2006, 02:25 PM

no it doesnt sound like a cupful of bolts in the engine, its just a "clonk"!

no, its not the chain i adjusted it a bit tighter and its definately not that.

pushr0d · 11-29-2006, 12:56 PM

Dave,

My '03 has been doing the same thing. I haven't had any luck trying to determine the source.

The only thing I can think of is a faulty chain, but I would assume I would have some other indications.

davsato · 11-29-2006, 01:09 PM

pushrod,
ive just changed my chain and sprockets thinking the noise was that, but its still there.

ventur4th · 11-30-2006, 01:00 AM

davsato,
I've had a clunking noise just after taking off from a stop. It drove me nuts not knowing what it was. Turned out to be the inside seam of my boot catching the edge of the foot peg as I would take off from a stop. The peg would fold up, then clunk back down before I put my foot on it. OK, I know it sounds dumb, but go out to the bike, fold the peg up and let it snap back. It's worth a try!