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Old 08-04-2010, 07:45 PM
karryhunt karryhunt is offline
Motorized Bicycle Member
Join Date: Apr 2010
Location: South Florida...brrr
Posts: 49
Default Re: I wanna go faster! Help me do it =)

Originally Posted by JohnLL View Post
Ok, I haven't been here in a while, but I came and asked some questions before building my first motorized bicycle using the Grubee Skyhawk 66cc angle fire engine kit. And it worked out great! I've put over 2500 miles on it using it as a daily commuter and for shuffling around town. Now I have a few questions before attempting to enhance my build on my next bike.

First, I used the basic setup, on a single speed Kona Unit mountain bike with 2.125 inch tires, and was able to hold a steady speed of about 35 mph, topping out around 38. This was a blast for a while, but now I want to go faster

My main questions are about my options to get more speed out of my next build. If I were to simply use a smaller 36 tooth sprocket on the rear wheel as aposed to the standard one, how much faster should that get me?

My father also said that I could make the front sprocket in the engine a bit larger, not only helping my top end speed but helping to keep my chain better in place, has anyone done this?

Also, I've been considering moving to a multispeed bicycle and finding a jackshaft kit. I'm not too familliar with how they work, but I may try moving up to one of those also. If anyone is using one and can give me feedback I would appreciate it.
I don't want to sound like a doubting Thomas but I have one question......

1. By what means have you used to veify the accuracy of your speed?

2. My Trek Cruiser Classic is set up with the same engine you have with a 10/42 tooth sprocket properly installed without tensioner, perfect chain alignment with Jim's hub adapter, properly mixed Opti 2 oil, 45 lbs in each tire and I challange anyone that tells me they can cruise at 35 MPH for an extended period of time without the bike putting you to sleep or falling apart.

3. I know there must be someone out there that will challange this but I would like to hear from them and see some proof on the speed accuracy.

4. Any takers?

Last edited by karryhunt; 08-04-2010 at 08:55 PM.
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