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Discussion Starter · #1 ·
I am replacing the stock piston in my 700xx, due to the it putting a 1" horizontal gouge in the cylinder wall. Honda offers piston and rings they say is 0.25 oversized. Is that 0.25 inches? If so can you bore the stock cylinder that much and still be good? If my calculations are correct, that would bring the 686cc to 774cc. Please let me know.
 

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No way....thats metric, in which case it would be a 691.
 

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Discussion Starter · #5 ·
Makes a lot more sense. The customer service rep from hondaservice.com didn't sound sure of himself. Just wanted to make sure. I didn't think you could bore that much out and still have a sleeve left.
 

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are the jugs on the 700xx possible to be bored? i was told they are chrome lined.
 

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i could be wrong but im fairly sure its 25thou, caus i know when i build car/4x4 truck engines the pistons come in increases in thou both metric and imperal engines, but like i say could be wrong caus i dont have the patentiance to build bike motors so havnt had much exp with them
 

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are the jugs on the 700xx possible to be bored? i was told they are chrome lined.
Sure...you can either bore and sleeve or bore and re-nikasil the cylinder.
 

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Sure...you can either bore and sleeve or bore and re-nikasil the cylinder.

i just found out from the dealer that it is not chrome lined and you can just bore it out.and you can bore .25 on the stock sleeve, if its worse than that you have to buy a new cylinder and run a stock piston.
 
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