Questioncan i change the 125cc cylinder block into 200cc cylinder block. theirs any problem with that? What is the right combination of the sprocket (engine sprocket and rear sprocket) for my honda 125xls. Thank you so much..ill be waiting for your response..thank you.
AnswerHi Jim,
There are a few problems with changing
cylinder blocks. The 200 block will
not usually fit into the engine cavity.
It requires major machining to
fit larger engine blocks.
Four stroke engines are very
hard to modify compared to
a two stroke which can sometimes
be modified with a larger cylinder.
You could bore your 125 cylinder
to it's maximum and that
would give you about 150cc.
Better to buy a bigger bike than
spending so much to modify a
smaller bike. The cost is too high
to modify a smaller four stroke engine.
Your sprocket is usually a 14 tooth
on the front and a 56 tooth on the rear.
Chain is a #428 size.
If you want a bit higher speed then a 54 on the rear could
be substituted.
Good luck!
Wayne S.
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