OzVMX Forum

Marque Remarks => Yamaha => Topic started by: Tahitian_Red on September 08, 2012, 12:50:07 pm

Title: Scored an RT-1MX cylinder today
Post by: Tahitian_Red on September 08, 2012, 12:50:07 pm

I found an RT-1MX cylinder today.  It is already bored to 1.25mm over.  I can get an aftermarket piston kit for 1.50 or 2.00mm, but man that seems big.  Is it safe to go that big?

Title: Re: Scored an RT-1MX cylinder today
Post by: Iain Cameron on September 08, 2012, 01:36:37 pm

Yeh Im running a 2mm over in mine  (comp is a bitch though) you will need a decompressor . Iain

Title: Re: Scored an RT-1MX cylinder today
Post by: vandy010 on September 08, 2012, 03:10:40 pm

2mm over is no problem.
then after you run out of genuine Yammy pistons,
you can move onto the TS 400 piston (with wrist pin mods) ;)
there still seems to be a good supply of piston port barrels on ebay.