How much play (left to right) should there be in a stock crank. I just got a blaster, and I am rebuilding the top end and want to make sure the crank is ok.

Thanks
Nez

 

Im not sure but i would definetely recommend ordering a Clymer manual they have every answer to questions like that

 

Left to right play doesn't matter. A slight amount of up and down play in the rod is WAY to much.

 

Big end side to side is .4 to .7 mm, up down is .021 to .035 mm. As long as the up down (radial) feels tight do not be to concerned with the radial measurements...........side to side is easily measured with feeler guages.

 

Hey daputz i like your gas tank. Where did u get it?

 

I measured the side to side and its about .030 of a gap. How should I measure the up and down (radial). Should I just try to slide the guage in between the bearing and the rod? I felt it and it feels soild no play but I want to measure just to make sure.

Nez

 

If there is any noticable play you will feel it by hand..

 

Side to side play dosn't matter?[img]i/expressions/face-icon-small-shocked.gif[/img]

 

it does matter but the tolerances are alot greater where as with up and down, almost any and its game over.

 

Yamaha will tell you that any up and down play is a bad thing!!! Failure is right around the corner!!!