650/X-2 can I use a 750 top end on my 650 lower case?

[an82mustang]

I have a 650 ts that needs athe cyl replaced... can I use the top end off of a 750? Will it bolt to my 650 lower end? Thanks in advance

 

[WFO Speedracer]

No it won't work, the 750 cylinder liner protrude into the case, the 650 cylinder liners are flush plus the piston pins are different sizes, 650 has an 18mm pin, 750's have either 20 or 22mm pins

 

[an82mustang]

Sweet... thanks for the info... at last I know what to look for now..