From my little expereince with JSRE if you get the lightened flywheel you better get the stator turned also or it will hit trust me. Also after talking to merc. tech his flywheels go to spaghetti when you go from a high RPM and let off, in turn the crank does the same and it was strongly suggested to me that if you want your crank to live not to run the lightened flywheel. Just my two cents worth..... Also have you ever seen his work before. What my brother had done on his 2.4's for his skater it was a little questionable. I felt that things were done very crudely and not much time spent on cleanup after hogging on it all. We had to do alot of cleanup before reassembly.