Thread: Big Bore Kit

MC, it is hard to beat the TB 88cc kit. For most it is the best bang for the buck. This is not to say you can't make stock Honda parts work, just a proven combo that works well for the money spent. For another $100 you can add a stroker crank and build out to 108cc. With either combo you can run stock carb and exhaust, but I don't know why you would want to. Aside from having less power (every component of an engine combination should be selected to reach peak volumetric efficency at the same RPM range for the best gain) you may discover cooling problems, and you may have a hard time finding larger jets for the stock tiny carb, aside from other problems of a mismatched engine combo.

I did exactly what you want to do.I have a H engine on mine too. No extra speed but it has more grunt

Gary, what are you getting for top speed? What size cylinder did you use?

Originally Posted by HymieP

Trailbikes sells lots of big bore kits. Definitely, buy the entire kit and make sure you also order the "high volume" oil pump that they offer, good insurance. I would suggest the 117cc TB kit.

could you possibly get me a link to the entire kit, thanks!

You will have to put the stock airbox,carb and exhaust on the shelf...

P.C. is right! Do your self a favore, add a 19 or 20mm carb (a Good one) aftermarket filter, and better exhaust or at least remove the baffle from the stock one. I have one set up like this and it runs up to about 53MPH.