How do you know that it is bored, but not know how much it is bored to?
I ask because often when an engine is rebuilt, it is bored out because the cylinder walls were too damaged to use. They bore it out .10 or .20, which is a tenth or twentieth of an inch. A lot of people think this = more displacement and it does, but not enough to make a big difference.
In actuality, if it needed bored .20 over, you gain around 3 cubic centimeters. So you go from 900cc to 903cc. EDIT: Maybe 904, since 1 cubic inch is a little over 16 cubic centimeters. Either way, you're not going to see any power increase and you wouldn't even have to rejet for a 4cc overbore.
If it has been truly bored out to 1000cc, (and even if it hasn't actually) you should be able to bolt up the carbs off a bigger bike if you jet them correctly. Whether or not it is worth the pain in the ass, that is a different story. If the bike runs OK with your stock carb, and your fueling is not a problem (i.e. your plugs check tan and not white as in too lean) then I'd stay with the stock carb. But that's just me.
well ima find out this summer lol ima take the whole thing apart and ill find out for sure the only reason why i ask for a carb is bc a piston vaccum is broke well i should say torn the reason so im looking for some spare parts and buying new thing for the carburator when i could get another carburator for the same price as the piston vaccums makes more sence to me once i have that part or used carburator ime take it in to the shop and see what they can do or find out about it
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