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Author Topic: Scored an RT-1MX cylinder today  (Read 885 times)

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Offline Tahitian_Red

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Scored an RT-1MX cylinder today
« 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?
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'74 Suzuki TM100, '75 Bultaco 250 Pursang, '77 Honda XR75, '77 Suzuki RM125B, '77 Yamaha YZ400D, '79 Honda CR250RZ Moto-X Fox Replica, '83 Honda ME480RD Mugen

Offline Iain Cameron

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Re: Scored an RT-1MX cylinder today
« Reply #1 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
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Offline vandy010

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Re: Scored an RT-1MX cylinder today
« Reply #2 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.
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