SX/SXi/SXi Pro 92 750sx, can i replace the crank with a hot rod 22mm ? i need help!

[skatedurn2]

I have a 92 750sx the crank broke I wanna get a hotrod crank and wesco pistons, but was told they don't have a crank for my 750 , they only have the 22mm crank, was told I could change a coupler? So I need some help if I can actully do that or if its false.

 

[Hirschfelt]

If you are getting new psitons then that crank will work. You will need the 22mm coupler and big pin pistons. 95 and up the same as sxr 800 pistons. The good news is you now have access to many different 82.??mm pistons. With a small pin crank you only have 82.00mm and 83.00mm. 83.00 is a bit too large IMO, but I have seen them used in a couple of skis. Big pin you can get 82.5, 82.75 more of a variation for your sx cylinder which has the lowest port timing of any 750.

 

[skatedurn2]

Okay and that's all I will need is that coupler and big pin pistons? And do I order sxr 800 pistons? And if so are they the same bore as my 750? I want to leave it the stock bore just with wesco pistons

 

[Hirschfelt]

First thing is to have your cylinders measured in their current state. Then go to the next size up. 750 cylinders are 80.00mm stock and can go 82.00mm with no problem and no crank case modification. You can go up 83.00mm max but will require some crank case modification. The cylinder walls are thin at 83 but can be done.

 

[skatedurn2]

Okay thanks a lot for the help and when I get this cupler that's for the driveshaft because the crank will come with the 22mm on it already correct? And that cupler is thread on the drive shaft?