OzVMX Forum
Clubroom => Tech Talk => Topic started by: Paul Jeffs on December 29, 2012, 03:26:18 pm
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Hi
I am looking for a cylinder for my rm125 a and have been offered one that looks visually the same from a photo. Only problem is he claims the bore is 55.5 mm. As the stock bore is 56mm I'm guessing it's off a b model. I've asked him to double check his size and he still gets 55.5. Other than the bore and stroke what if any differences visually are there between the two. Thanks Paul
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If the barrel has an un-bridged inlet port, and T shaped exhaust port it is an A barrel. I just sold an RM100B barrel (RM100B & RM125A both have 50mm stroke so same port timing) that was a hint under 56.00mm, the 100B's still had 123cc cast into it; Suzuki must have used the same mould for both bikes but pressed in a smaller ID liner for the 100B.
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Thanks for the info John . The inlet port is bridged and exhaust ports square so it must be a B barrel. Thanks again for your help. Paul