OzVMX Forum

Clubroom => Tech Talk => Topic started by: micko on February 28, 2015, 05:01:05 pm

Title: RM250A oversize Pistons ?
Post by: micko on February 28, 2015, 05:01:05 pm

Seems to be a bit of a rare thing being different size to B and C RM's. whats around these days ?

Title: Re: RM250A oversize Pistons ?
Post by: LWC82PE on February 28, 2015, 05:15:51 pm

Might be able to make TS250 work as they are 70-72mm.

Title: Re: RM250A oversize Pistons ?
Post by: pmc57 on February 28, 2015, 05:17:32 pm

TS250 pistons do the trick. They just need some of the skirt removed to clear the crank webs and drill the two holes at the exhaust bridge. I've built two RM250A motors with TS250 in each, performance is great.

Pretty sure Wiseco do them in 0.5mm increments up to 72mm.

Title: Re: RM250A oversize Pistons ?
Post by: micko on February 28, 2015, 05:35:32 pm

Thanks, just read it in an older thread. Wealth of information you guys ????

Title: Re: RM250A oversize Pistons ?
Post by: LWC82PE on February 28, 2015, 05:36:57 pm

Thats what i thought. Yes up to 72mm.