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Tried to do some searching and couldn't find a whole lot of information on going to a 2mm or 3mm piston in my Gen 3. I'm in the process of doing a Carpenter head and cam package and since the engine is going to be out, I'm considering doing an overbore on the engine.

What can I expect? A friend just did a 2mm piston in his Gen 4 and is very happy with it. I have read some people say a 1078cc runs hot in the street because of the thin cylinder walls while others say it runs fine with no issues. The bike is mostly street ridden but will be seeing the track more once I get all my upgrades done.

I have no problem doing a little more maintanence on the engine do to a 1078cc motor but I don't want to have to deal with problems like the Headgasket not sealing or the engine overheating all the time.

Any input appreciated
 

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Iv built a few of both in the gen3, i haven't found a heat issue with either, on street or track, but you need to be reserved with the head skim compression increases cylinder heat dramatically, if your using woosner pistons then a 0.45mm Cometic head gasket & 0.3mm head skim at most, if its JE pistons then 0.45mm Cometic head gasket with a maximum 0.4mm head skim. The fueling needs to be spot on so a good tuner is essential.
 

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Iv built a few of both in the gen3, i haven't found a heat issue with either, on street or track, but you need to be reserved with the head skim compression increases cylinder heat dramatically, if your using woosner pistons then a 0.45mm Cometic head gasket & 0.3mm head skim at most, if its JE pistons then 0.45mm Cometic head gasket with a maximum 0.4mm head skim. The fueling needs to be spot on so a good tuner is essential.
Just wondering how much power you gained and what did you do? (2mm or 3mm, cams also etc)
Who did you use for the Nikasil replating?
 
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