engine noise(clutch)

[gassergrant]

since Ive rebuilt my mains and big ends my engine has started this not so good sounding noise.
I'm happy with the rebuild but did not replace any bearings in the box.
right the sound is like small ends but there new? Ive noticed when pulling in the clutch the noise goes or now just quietens up, could it be the clutch bearings at all. i cant see whats happened here but could a rebuild being done and disturbing the engine bought this to light.
when i ride the bike hard the is no noise its only on idol this happens

what do you guys think

thanks grant

[stabak]

Sounds like my symptoms : http://www.gasgasrider.org/forum/showthread.php?t=12778

Called a local gasgas mech for advise and he mumbled something about the clutch basket and that I have to live with it till it needs replacement

What's unusual like in your situation is that it appeared out of the blue after a top end rebuilt

Keep us posted

[gassergrant]

yeah totally odd, im not sure about riding it in case i do some long term damage.

i did have the box apart followed the manual to fit it back together.

there power valve could do with adjusting the slack but this is louder than the PV, no chain slap as its stationary
did read that thread the other day thinking about this if i can i will make a vid but not sure how to post it on here

[gassergrant]

fixed. the nut on the crank to hold the balance and drive cog was loose, ops
Ive used thread lock and tightened up nice and tight now

[rpduc]

Interesting, I just had exactly the same thing happen after a bottom end rebuild. I'm "almost" positive I torqued that nut to spec even saying to myself while doing it that the 40Nm spec seemed kinda low for that big nut...

At the end of the first day riding after rebuild the thing sounded like I was gonna have to do it all over again. You could see where the nut had worked it's way out far enough to be nicking on the case. Still not sure why pulling the clutch minimized the noise though...

[Fred1956]

???My torque sheet shows 70nm for the flywheel & 98nm for the crank pinion.....even the clutch basket is 60nm.... maybe a misprint somewhere?

[Jakobi]

You have a torque sheet?? I didn't know Gas Gas had these things available

[Fred1956]

LOL Jake!! I keep the GMP torque sheet on the wall at the shop. I even use those value for the 'orange' bikes, helps them run better but they still won't turn. ;-)

[rpduc]

Yep,
Must be a misprint. I looked it up again in the shop manual i have and it definitely says 40 Nm. 98Nm sounds more like it. I think I've seen a torque list, maybe a page from one of the manuals???

[Fred1956]

http://www.gasgasrider.org/torque_table.jpg