Yamaha TRX850 Enthusiasts Forum

Did my service the other day, and in course adjusted the chain.
Now have a pronounced vibration in the chain around 3500 - 4000rpm, especially in 3rd gear.

Chain seems to line up with the sprockets, by eye, metre long straight rule, laser level etc, graduations on the swingarm (though I know these are inaccurate). Wheel, by sight, though still needs to go to the left a little.

Other than adjustment, what else should I be looking at? Chain slider worn? Wheel bearings, Carrier bearing, sprocket nuts? Other than this, bike seems to be running fine.

Another ?, is the YZF750 swingarm the same width at the rear axle as the TRX? What I mean is, are you able to fit a YZF arm but still use a 160 wheel?

Bob

PS to straighten the front wheel, do you undo the top yoke nuts or the bottom ones?

More than likley a tight spot or worn link.

Re the YZF arm. No, this is not the same size as the TRX but with some spacers, new wheel bearings and different axle (or spacing tube to go round YZF axle), spacers or discs and caliper it can be made to fit

Bob, just did my chain and sprocket set - replaced with a Chaingang set. Cannot believe the difference - Guess Ekoja really knows what he's talking about. He said "IT WILL FIX YOUR VIBRATION PROBLEMS YOU DUMB SHIT"



and it did


I thought the ass was about to fall out of the engine

wombat did you turn the wheel to find the tightest part of the chain BEFORE you adjusted the free length ? After you tighten the axle nut recheck by turning the wheel a few times to recheck free play . I usually go for a slow ride and pull the clutch in about 20 kph , listen and feel for vibrations

Glen1TRX wrote:Bob, just did my chain and sprocket set - replaced with a Chaingang set. Cannot believe the difference - Guess Ekoja really knows what he's talking about. He said "IT WILL FIX YOUR VIBRATION PROBLEMS YOU DUMB SHIT"


and it did


I thought the ass was about to fall out of the engine

You sure that was me?
Nah, I would'nt have said that.