GUINT1

DO anyone know anything about the REX 421P motor?
Two guys that i knew both of the blew there motors one of the had the (rex) and the other one had the 421P. (tops)
They both cracked or should i say split there sleeves right in half.
I just opened and started to break mines in. And i dont want that to happen to me.....

sikgraffx

I've had no problems with mine.

Ah10

I think you will have better respond if you take it to 1/8 onroad thread!

mrx

iTrader: (19)

please post the link to 1/8 onroad thread, thx

mrx

iTrader: (19)

All Novarossi Rex,Top,Rx 421p is the same. The new 321p (abc) type will replace 421p due to high wear on the alun sleeve.