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XR200 camchain sprocket on crank

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How is the cam chain crank sprocket on an XR 200 located and locked in place?

I’ve just split the crank and there is no keyway and so far I can’t see any timing marks.

What’s the go??

Cheers

Brent

PS I know I should get a manual and I will

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The sprocket is a press fit onto the crank, alignment is to the rotor keyway. A bit sketchy IMO but others have changed sprockets without problems.

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Thanks Chuck,

I've since checked online and found some more info. I don't like the way they do it but it seems to work ok. I've never heard of one failing.

Cheers

Brent

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I did one about 10 years ago or so on mine and have had no problems. Its pretty easy. Heck i even pressed the crank apart to replace the rod and pressed it back using a jig i built at a machine shop. Turned out perfect. I couldn't even find a local place that would attempt it. Maybe i got lucky.

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