hi all im new here ive just bought another mc18 sp. theres not much of the original bike left coz i cant help but fiddle.
ive noticed some of you guys are running single ring pistons from but i tried everywhere and still couldnt get any honda ones, is there an outlet i dont know about?
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wadda ya mean its too fast!

I thought folks running single rings had just taken a ring off their current pistons to reduce friction. I don't know which ring is best to take off or even if this is what people do?
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After years of moaning about immigrants now i am one...

Most that run single ring pistons use the HRC F3 ones but these cant be used with stock barrels or stock crank.
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If I have to take the carbs off once more...

Good job I have a couple of cranks and a pair of RS kit pistons with the 15mm pin too.

Like rocking horse teeth they are!!
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Andy.
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Rocking horse teeth?
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If I have to take the carbs off once more...

Yeah... rarer than hens sh*t!

Irony Baldrick... you do know what irony is, don't you?
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Andy.
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Bet I can find some rocking horse teeth..... brb

Still, nor do I have any trouble with pistons because I have a good collection of cranks also lol.
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If I have to take the carbs off once more...

im not that lucky to have f3 barrels or rods!!
id been looking for ages for something to fit and in desperation i went to see a friend who runs bike shop, he took the piston and has matched it up with another one. single ring and its compatable with the barrel. the only thing thats not quite right is that the dimention from the pin to the crown of the piston is 0.3mm shorter.
the theory is try it with standard gaskets first (it should give better over rev) and then have a go with thinner base gaskets.
it will be checked on a rolling road before i advise anyone else to do it. so if im upset next week you'll know it must have ended in tears
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wadda ya mean its too fast!

RM125 are apparently similar.
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Andy.
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i think he said it was suzuki prolite pistons, i'll let you know how i get on
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wadda ya mean its too fast!

im running the RM 125 pistons in my mc21. fitted perfectly and havent givven me any troubles now 8000km after fitting them. will be replacing the rings soon as a matter of caution but all seems well with them. Its the 94-98 suzuki (am i aloud to say that word here? lol) RM 125 items which should do the trick.
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Hesitation is Fatal!!

[quote="StephenRC45"]Rocking horse teeth?[/quote]

i was going to say the same thing lol !

excellent thanks for the info.
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wadda ya mean its too fast!

How could anyone put Suzuki parts inside one of God's very own motors?!
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Andy.
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Don't you mean S*zuki Andy lol
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If I have to take the carbs off once more...