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What does 92mm JE Piston kit and top end gasket do?

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And how this affect the bike (more hp? )

A friend noticed it increase from 400cc to 416cc

Can someone please explain how?

and last , does it mean the engine need to be open and break again ?

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I was waiting on the Barnupro ebay add to cause a question..:cry:

Something they forgot to mention,, ,, you have to have the cylinder bored and plated.

The piston in the pic,, well it looks the valve relief pockets were cut with a pocket knife.. or maybe that is just the pic :cry:

What will a larger bore do?? Yes more power can be made..how much more,, with out the other mod normally done along with a big bore (and 92mm is hardly a "big Bore" more like a service replacement piston, 2nd over)

For the cost of doing that piston and the other required work,, Call up MT, and order the 94mm 12.6:1 kit.

Yes the top end has to come off, yes the bike has to be broke in again.

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