Originally Posted by
tallyram
i just happen to have a new ninja bo1a piston and sleeve set sitting in front of me and they are identical to the grp parts! i know the mrt ninjas had the epoxy filled cranks and magnesium heads, but what else was done to these engines?
I think the first Ninja sleeves didn't have any angled cut ports. I remember looking at mine when I had it apart, it it looked like just plain port cuts, no angled in cuts from the bottom. I also remember someone stating Jim at fusion said they were pretty rough cut also. Maybe the new sleeves have more work done on the ports.