Originally Posted by
uDi_MP7.5
Hi Guys,
I've got a JP Modified Pro 99 Buggy (offroad) engine. I believe it is technically a 7-port motor, although there are 11 ports on it in total if I remember correctly.
It was running great the last time I used it (about 4 years ago), and it still has good compression. I believe it has a long life left.
But there is a tiny bit of play in the conrod lower bushing interface at TDC, so I'm wondering what conrod part number/s will fit this engine if anyone knows for sure. I'm guessing something from NR or RB should fit.
Any help appreciated.
The Novarossi part # 07000 rod will fit your JP .21. The RB Concept rod will not fit because the crank pin dia. is larger on the RB cranks. Just to be safe, i would check the crank pin of your JP and make sure it is still round. Richard D