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When retarding the timing on my yfz450 it hits the piston. I have a hotcam in it and the timing chain is set to the marks. Been struggling not sure what to do next. Any help is appreciated.
 

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When retarding the timing on my yfz450 it hits the piston. I have a hotcam in it and the timing chain is set to the marks. Been struggling not sure what to do next. Any help is appreciated.
Hot cams should have 13 pins between them not 14 like stock cam. Set the crank at TDC and take a picture of the timing marks.

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