Yamaha TRX850 Enthusiasts Forum

Hi, new to the forum & prospective buyer.

A bike I'm interested in has a burst pad at the back of the seat.... 'bumpad' ? I assume not uncommon. Should the whole thing be removable & fixable? DIY or Upholstery skills required? Or full replacement?

The top yoke has been messed-with....are there any other bikes yokes that look good as replacement? It has standard forks.

And what is the service interval for valve clearance checks please?

GaryD wrote:Hi, new to the forum & prospective buyer.

A bike I'm interested in has a burst pad at the back of the seat.... 'bumpad' ? I assume not uncommon. Should the whole thing be removable & fixable? DIY or Upholstery skills required? Or full replacement?

The top yoke has been messed-with....are there any other bikes yokes that look good as replacement? It has standard forks.

And what is the service interval for valve clearance checks please?

Welcome to the forum!
Bumpad, yes very common. DIY or pro - it’s up to you. Easy to get it off from the inside of the rear fairing.

Valve clearance; officialy 42.000 km but better to look after it sooner.

Fitting an other top yoke, not a different model that I know off. You could try to get a decent second hand?

Ok, thanks T.

Only other issue with valve clearance is the 95 Japanese imports and 96model TRX had an issue with inlet valves and would need replacing at 60-80,000km. 97 model onwards had revised inlet valves that no longer deformed .

cobbadiggabuddyblooo wrote:Only other issue with valve clearance is the 95 Japanese imports and 96model TRX had an issue with inlet valves and would need replacing at 60-80,000km. 97 model onwards had revised inlet valves that no longer deformed .

It is a '97, so hopefully ok.

It's recent MOT test has an advisory, - Rear Suspension arm pin, bush or joint worn. Owner says he doesn't know. Swingarm? 36k miles. Diy or professional fix? How long would a bike shop take to fix it?

With the salt on your roads there is a good chance where the bearings sit on the bush there is corrosion.
Not that hard a fix and lift the rear of the bike off the ground via a ratchet strap to a point above.
Remove the rear wheel, remove the dog bones bolt from the swingarm. Remove the swingarm pin and the swingarm for inspection.
Search the forum as there is a list of replacement bearings and seals and much cheaper than buying genuine Yamaha bearings. Bit of luck the outside of the bush where the bearings sits will clean up ok with some wet n dry.
Repack the new bearings and some inside the sleeve or axle pin with decent grease