Originally posted by Sow&Steady
I can't but the three port still puts me off a bit unless I decide to enter the rubber races. But painful memories of collecting boxes of inserts, wheels and tyres just wore me down. 
JP website mentioned that the engine with the new 3 port sleeve (IDM style type porting) is about the same performance of their 5 port engines.
Ah, with a JP FX 3 port, why should you need to be relegated to join the rubber tire class? I'm sure the 3 port kicks in every bit of butt in the outlaw 5 port engine class.
