I noticed a hairline type fracture on the outside of the sleeve on my tuned .21(where it faces the crankcase not the piston). It is a very light fracture not much more than a scratch and it may have been there for 3 months or it could have happened yesterday. Not sure. But given the pressures and temps in that area kinda want to change it out. My questions -

1. I know the piston/sleeve for the tuned version is like hens teeth but is the P/S on the sport version identical?
2. Is the older Ninja P/S identical?
3. Has anyone found an alternative P/S yet?

It still has boatloads of compresson and has been such a great motor that i don't really want to just thrash it like it is and risk it going pop at an inopportune moment. Nor do I want to leave it on the shelf as a book end!

Your thoughts are appreciated.

Cheers, Mike.