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2003 Vfr800 timing jumped a tooth

2 posts Started 21 Jul 2025 Last recovered post 21 Jul 2025 Wayback Machine snapshot 22 Apr 2026

#1

Hi everyone, I noticed the cam chain was rattling really badly, It has a manual cct at the back, i tried setting the tension whilst turning the engine slowly by hand at the same time but then I did this it was diffucult to turn then almost cracked loose and I assume that was the chain jump and then catch again on the cam sprocket due to being so loose .

I tried starting it after setting cct and  it wouldn't fire up so I checked the timing and found it looks to be out of time by a few teeth, can anyone confirm This before I adjust the timing

20250720_131613.mp4
#2

You have got the crank in the right spot and I think your intake cam is retarded by one tooth. The RI mark should be parallel to the cam cover gasket surface. For the exhaust cam you can sight through the hole in the frame spar to check it's alignment but it also looks like the chain has skipped forwards by one tooth there too.

I bought new standard CCTs from Webike Japan, GBP128 delivered for two. 

End of thread · 2 posts recovered Wayback Machine snapshot 22 Apr 2026