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WR450FGreg

'08 WR450F rear shock "topping out" ???

6 posts in this topic

I haven't investigated this properly yet, I just noticed it when I parked the bike after a wash last night.....

I lifted the rear end and felt a bit of a "clunk" at full extension. Not extreme, but definately there.

I couldn't hear/feel it yesterday when jumping it on an MX track.

Maybe it's normal, I don't know. This is my first dirt bike in a lot of years.

The bike has 700km on it and yes, I have had the rear end apart and re-greased it all, tightening all the bolts to the specified torque.

Your thoughts?

Greg

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You'll need new linkage or shock bearings - it's one or the other that's clunking - easy and cheap fix, but you should go as far as taking the shock out to see which ones need replacing - once you've done that, you might find your swingarm is in need too - many times, when one is gone it means all were neglected.

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Ditto. My guess is the bearing that the 17mm nut on the relay arm attaches to, but like Matt4x4 wrote, you never know til you take things apart.

A good source for bearing info is at http://www.motorcycle.mryamahaparts.com/yamaha-motorcycle-parts.htm

Find the part, the bearing and part number.

You'll need new linkage or shock bearings - it's one or the other that's clunking - easy and cheap fix, but you should go as far as taking the shock out to see which ones need replacing - once you've done that, you might find your swingarm is in need too - many times, when one is gone it means all were neglected.

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I doubt anything is wrong. It's a brand new bike.

If it were me I'd check the all the linkage and shock bolts and then I'd go riding.

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I haven't investigated this properly yet, I just noticed it when I parked the bike after a wash last night.....

I lifted the rear end and felt a bit of a "clunk" at full extension. Not extreme, but definately there.

I couldn't hear/feel it yesterday when jumping it on an MX track.

Maybe it's normal, I don't know. This is my first dirt bike in a lot of years.

The bike has 700km on it and yes, I have had the rear end apart and re-greased it all, tightening all the bolts to the specified torque.

Your thoughts?

Greg

Greg - What you describe is typical of a worn out Heim joint (the semi articulating bearing) at the bottom of the shock. But with just a little more then 400 miles on the bike it sounds unlikely. The only thing I can think of, is something was not re-assembled correctly when you regreased your suspension. Make sure the two grease seals and collars on either side of the lower Heim joint are on the shock. I remember the collars falling out while re-attaching the shock.

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.

.

Thanks guys.

The only thing I can think of, is something was not re-assembled correctly when you regreased your suspension.

Yeah, I might check that out SXP. Cheers.

Greg

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