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Hamish

cam chain

7 posts in this topic

As I have my bike apart for gearbox rebuild I wanted to check the cam chain. On other bikes I've owned, there has been a specified maximun length for 20 links of camchain.

Amyone know what it is for the WR?? The reason I suspect the chain is that when the engine is on TDC(according to the flywheel) the cam timing marks (inlet and exhaust ) sit about 1/2 a tooth above the head surface. Maybe the TDC mark is incorrect, I'll check that with a piston stop and degree wheel on reassembly.

Hamish

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The cam chain should be good for the life of the bike. My dealer has never had one ordered or replaced one.

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Replacing the chain is cheap insurance. Better safe than sorry.

You can also tell how worn/stretched a chain is by how much travel is left in your cam chain tensioner. If your adjuster is maxed the chain can jump teeth, and that leads to bent valves, etc.

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Hey hamish,

How many times have you had to rebuild that gerabox now :cry:

Just the once, which was about 6 months ago.

Going to do the head soon as I managed to score a set of aftermarket Ti valves for pre release testing. I'll post the results when it's all done.

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