Gru Bee?

Youngbird

Youngbird

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OK, so it was time to re-think some things. Conclusion was that overall displacement isnt everything, especially once I started to look into the 50cc Honda or their clones. The GruBee drive setup looks sweet too. So now Im thinking a 4 stroke inframe with the Grubee setup. Now....whats a good source for the GruBee stuff? Anyone have suggestions? Thanks, Jim.(c)
 
Thanks for the input Misteright1. Ive been eating up all the Grubee info. I can find and Im thinking Im sold on them. Quieter, smooth and dependable. In Frame 4 stroke it is.(c)
 
I just checked out the 4 Stroke Installation Manual at Bicycle-Engines.com. They're a little vague on some things. Another problem I have with it (the manual) is they don't know the difference between concave and convex.

Paste from the manual:

The sprocket has two sides. One side is shaped like
the inside of a bowl (convex). The other side is shaped like the outside of a bowl (concave). It is sometimes difficult at this point in the installation to determine whether to install the sprocket with the concave side facing in or out. This is a judgment call based on how close you want the chain to the tire when the motor is installed. In the case of the Schwinn Jaguar, the sprocket was installed concave-in (facing the bike).

I learned in elementary school that concave was dished in, like the mouth of a cave. I never had a problem confusing an inny with an outy. Apparently the guys at BEc went to a different school. :-{

The instructions reference concave and convex when mounting the sprocket. Which leads me to question which side of the sprocket they're talking about. If you look at the inside of a bowl it's concave. Do they mean their concave or the real concave? (?)

It sorta makes me wonder if they fudged anything else up. :eek: I think I'll just build my own kit. Well . . . at least to where it meets Pablo's kit. (^)

Ted
 
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