6 replies to this topic

[Lian]

My mate asked me put this here and ask your advice.

He have GasGas04 txt 280. After one usual ride we took our bikes again next day and gasgas start making strange noises while revs are come down.
We thought it may be clutch basket rotating in dissonance but inside it looks good, nothing is not loose. I see gasgas clutch system 1st time and i suspect that hex-nut bolt inside in center of clutch basket keeping whole basket screwed in?
He thought it can be something with gearbox, but i don't see any signs - gears switches good up and down. What else?

This video with noise helps to understand my question. It hears more right side from engine.

Edited by Lian, 04 September 2009 - 02:37 PM.

[smalley250]

Ive just had similar problem on my Gasser and it was a roller bearing in the gearbox. Dropped oil and found small bits of bearing in the transmission oil and sump plug. Luckly i stopped riding and caught the fault in time so no damage done other than £25 in parts. The bearing is on the gear train and will need to be stripped to acutally see it as it may not see to be at fault as mine felt ok until stripped down.

[Lian]

Could someone help me with link of disassembling bike (i.e. manual how to put engine out of frame)?
Thanks.

[smalley250]

Nightmare mine has turned into a £200 plus rebuild as the bearing bits have knackered some bearings and an idle gear. So ive had to take out and strip and replace mains and seals and numerous bearings in the box.
I dont think you should attempt the removal as if you need a manual on how to do it then forget it as its very easy job. Just remove tank then rad then EVERYTHING

[Lian]

200 pounds!! f* s**t..!


Can i extract engine just removing skid plate? Or i need pull out it from the frame's center, taking out radiator, fan and other?

Engine prop to rear fork by 2 clips (i think..) do i need remove swingarm?
Thank you.

[copemech]

Lian, on Sep 18 2009, 10:26 PM, said:

200 pounds!! f* s**t..!


Can i extract engine just removing skid plate? Or i need pull out it from the frame's center, taking out radiator, fan and other?

Engine prop to rear fork by 2 clips (i think..) do i need remove swingarm?
Thank you.

2 clips and it will drop right out on the ground, done! Caveman could do it!

[biffsgasgas]

I removed my engine with out removing the skid pan. remove all bolts, chain and hoses then lift and twist. As for this noise can you be moer descriptive? I made this video which explains some noises in the lower end. With the transmission having several gear transitions the noises that are there are normal in some cases due to the slack between gears. Here is a bit of explanation on the power flow in the trans. If you have true lower end damage then you usually have piston or cylinder damage.

--Biff