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Old 12-11-2012, 06:07 PM   #11880
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Joined: Sep 2006
Location: Esperance WA
Oddometer: 1,241
techo boffic question

Maybe I'm a bit confused and I don't want to go back into all the old posts (lazy shize I know), but here's a quick quation for the techo boffins:

Standard piston diameter for the RD07 = 81mm with 72mm stroke (742cc and 9:1 compression)

If I remember correctly, maximum oversize Honda pistons (got a set at home, but too lazy to go rip them out and measure them now) = 81.5mm

I've got some JE high-compressy pistons in at the moment and am pretty sure they are 82mm. And Honda Hawk 650 pistons (3mm oversize) = AT 750 pistons (1mm oversize). That's around 760cc.

How big can you go without cutting the crankcase? What's involved with cutting the crankcase?

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