Rear of engine wear.

[nato]

My 2010 300 has had a fair vibration and we have removed the motor from the bike and inspected all mounting points and it turns out where the bolt goes through the rear of the motorit is elongated and worn around 2mm, So from that i have decided we will drill the hole to get it round and put a bush in it. Anyone else had to do this?

[gg3]

no but I'm going to check!Thanks

[Jakobi]

My bike is vibey as.. Will also check..

[wasp4banger]

Reckon you need to check all of the other mounts. Are the head straps still OK?
On mine I had the motor work loose after the head mounts broke and wore the rear mount a little.
Had a set of shims made up after loosening all of the engine mounts to ensure a snug fit for the motor within the frame.

[Rabbitist]

Mine has at some point been broken and re welded back together on the rear mount???

[nato]

I have replaced the front mounts after they broke. While i love the light weight gasser I personaly would not mind a little extra weight for things like this. Maybe its just me but little things like this are frustrating. Though they are not annoying enough to stop me getting another one.

[Keg]

Keep all your engine bolts tight and they won't vibrate and wear! All 2 stroke mounts should be checked regularly.

[Sierra Gasser]

I have built a jig that holds the case securely for a milling procedure to properly locate & bore the hole out & install a steel bushing.I have seen at least a dozen motors with the hole badly elongated,to the point that the rider can't keep engine mounts tight. you ship em I fix em. If anyone wants this done either send me your cases or I can do the motor for you too .I stock nearly everything in a GG motor so I can do the job right. Email at ntms1@sbcglobal.net attn:Mr. GasGas

[GMP]

Good to have your service available, thanks for the solution and post.

I have had three GG 250s, while the fits varied and linkage reassembly/installation was sometimes a challange on my '00, I never had a problem like this. Never even a loose motor mount. The swingarm pivot has to be torqued to 80Nm first, before the other mounts. Maybe the 300s are more prone to this due to more inherent vibration, but it should not be a problem. If its tight enough it can't vibrate.

[stainlesscycle]

Originally Posted by GMP

The swingarm pivot has to be torqued to 80Nm first, before the other mounts.

are all linkage 81Nm? - swingarm, links, 2 frame bolts for linkage? i know shock is 39 top and bottom. chart says "suspension clamp bolt - 29Nm" which is this? the 2 bolts that attach linkage to frame?