I tried searching but I'm just curious as to what the ole computer has to say about the big bore kits.

Estimated HP and ft/lb?

 

There are a couple of runs with the Kustom Kraft 331cc kit posted in this forum.

One was about 27hp while I think the other was about 28hp. I think the HP split would have been larger had they been run on the same machine, because one had headwork and aftermarket cams while the other didn't.

 

seat of the pants, one guys 9 horses is another guys didn.t notice.

 

Yeah and you almost have to take into consideration other mods. Each mod will effect the HP, especially what you did and how you did it. Because you can bet no one is going to big bore and run the bike completely stock (minus rejetting). I mean you know at minimum the snorkel is coming out. From there you have the choice of leaving it, putting in a KDX snorkel, taking the lid off, UNI/TWIN AIR filter, vs. leaving it stock, or getting real flow from a K&N, removing the backfire screen, crank vent, exhaust, rejetting the carb and what jets, or getting a new carb and what size and brand, what kind of exhaust, porting, cams, ignition, timing, flywheel shaving.

It's endless.
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Black Asian