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Old 08-03-2012, 06:43 PM
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biknut biknut is offline
Motorized Bicycle Elite Member
Join Date: Sep 2010
Location: Dallas
Posts: 6,280
Default Re: 50 cc with 66 Speed Carb and billet intake- highly recommend!

I'm also a fan of the Speed carb. Until recently I was running it on a Flying Horse 48 cc.

I compared the sizes a NT vs Speed Carb.

NT carb........ = 13.74 mm
Speed Carb... = 14.78 mm

I just changed motors in my bike. I kept the same speed carb.

IMO the speed carb is a better overal carb than a NT. The NT seems like it has a little better bottom end throttle response, but it's a lot more touchy about 4 stroking on the top end.

With the Speed carb, the motor starts easier, and idles a lot better. Any 4 stroking is greatly reduced, or eliminated.

This is my new Flying Horse 80 with Speed carb

Last edited by biknut; 08-03-2012 at 06:48 PM.
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