Randyc

Anyone know which nova rossi p/r/s/ kit will fit this motor?

V for Victory

I think the novarossi R1 fits, after the JP case is nova based.

michael 1

iTrader: (2)

any of the 321 will do

Sirio2127

iTrader: (1)

The jp fx R-03 engine is based on a novarossi rx321p only difrence from the later novarossi 321p engines is rear bearing size the jp fx R-03 has a 25.4x14x6 mm bearing and the later nova 321p engines used a 25.8x14x6mm rear main bearing. Outher than that there almost identical. I am not shore if the very latest jp fx R-03 engine uses the latest size bearing 25.8x14x6mm. If some one has a recsent production date jp r03 Please let me know. Regards Jeremy.

cruise

hi sirio2127,

you're right, the new version of rx-03 is using the bearing 14x25.8x6 (part no. 16800). the crankcase and backplate are also different with the former version.

wm :-)