Originally Posted by
Mike Schmidt
YES.
Years ago I was racing Kawasaki 125 based engines. I had the brilliant idea to use their 250 sized reed cage in my next motor. (Six pedal verses 8 pedal) Built a new billet crankcase and some real trick welded up aluminum intake manifolds over the winter. The motor was a dog. Tried all kinds of stuff and it was several mph off my good motor. Ended up filling in the crankcase with Marinetex epoxy and put a set of 125 reed cages in it with real short intake manifolds and it ran real well.
Looking at your three reed cages, the stock one and the scooter one have way too much reed stop area. The one on the right looks like a 125 motocross sized cage. Huge jump from the two on the left. My vote would be to find a normal pyramid reed cage out of a 70 or 80 cc motorcycle, not a V Force and test it. Other option is to close off some of the reeds in your existing V Force cage.
Years ago we did a lot of dyno work on 100cc Yamaha kart motors. We found that you need to get the carburetor as close to the reed cage as possible. It improves the "signal" to the carburetor.
Good luck
Michael
Bookmarks