difference between mkII and gen 2 pistons

[Black wing]

will the pistons out of a gen 2 fit on a MK II or are there to many differences? the bore and stroke are identical, compression ratio between the stock mk II and the kit i want are the same.

 

 

http://www.powersportparts.net/Wiseco_Forged_Piston_Kit_3_00mm_Oversize_to_82_0_p/4129113.htm

 

 

and if there are any major differences what would be needed to make them work.

Edited July 13, 2016 by Black wing

[MiCarl]

There is a lot that goes into pistons other than bore and stroke. Skirt length and configuration, wrist pin dimensions, ring grooves etc.

 

Yamaha used different part numbers for MKII vs. 2nd gen. They're not in the habit of duplicating parts with different numbers.

[Black wing]

oh for sure,though the only real difference i can find between looking at photos and from what limited specs i can find is that the stock rsv has a compression ratio of 10/1 (10.5/1 in the aftermarket kit) which could just be a slightly shallower piston face, and 10.5/1 in the venture. im hoping someone has a few stock pistons laying around to get real measurements off of, or someone who has run them in either or.

 

also what i have dug up is that the wrist pin and all the piston rings are matching part numbers between the two

Edited July 14, 2016 by Black wing