Thanks for the interest. Here's a quick rundown of my ride. This has the Honda chinese clone engine and the trans does not have the disengage feature or the freewheel feature like the more expensive GruBee kit. I installed a center two leg kickstand for stability and so I can tune and check the running gear. A freewheel sprocket on the tranny would have been nice, but I like to use the engine for braking and the added drag of the tranny when pedaling isn't too bad since I do have seven speeds on the pedal side. The engine starts easily and quickly and is smooth and quiet. The original rear sprocket was a 48 tooth, but I changed to a 44 to reduce engine speed at cruise and increase top speed. I have gone about 28 mph tops so far, but since I really don't know what the top rated rpm is, I tend to be conservative. I do have a tach and I limit it to 7500 rpm. I'm considering a 36 tooth sprocket which should put me in the mid 30's for speed.
Originally ran tranny with grease and a dry clutch. It was OK but clutch action was a little grabby and there was some gear whine. I didn't use oil because these trannys like to spray oil out the vent hole. After I fixed the spraying problem, I put in 5 ounces of 75W90 synthetic which really improved clutch action and reduced gear noise. I don't have much running time on this setup, but I think it should run well.
I recommend the air horn - very loud - about 30 blasts per charge. I do use a bell for pedestrians. The loudness of the horn can be adjusted, but I prefer full blast for when you really need it. Also, the fuel tank is the same as the two stroke model - standard size.
I think I answered most of the above questions. Anymore? Let me know. This is my first motorized so I know I'll be able to learn a lot from you guys and I'm happy to be able to contribute.
Ray