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Discussion Starter #1
Hey,

Looking for top end from Yamaha AS1. I think AS1, AS2, and AS3 will work. Maybe RD125 and TA125 too. Any 125cc twin vintage Yam. I can get the pistons, but haven't found any cylinders. Maybe complete motor, carbs too! Thanks peeps.

G
 

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hey, if you find rd125 parts are interchangabel, please let me know. i have one kicking around and i know i cant ge pistons or anything for this thing.

jc
 

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Discussion Starter #3
Joe,

According to the specs that I found online, the Yamaha AS1 (or YAS-1), AS2, and AS3 all have the same Bore and Stoke as RD125's from '73 - '76. 43mm x 43mm. They have slightly different compression ratios and HP output, but everything else I've found looks consistent. Let me know if you stumble across any spare cylinders.

G.
 
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