Thread: Please Help
View Single Post
Old 05-02-2014, 02:14 PM
KCvale KCvale is offline
Motorized Bicycle Elite Member
Join Date: Feb 2010
Location: Phoenix,AZ
Posts: 3,554
Default Re: Please Help

Originally Posted by vsaxena View Post
So I bought an 80cc motorized bicycle from a guy off Craigslist
Just for your reference there is no such thing as 80cc, you see them listed as 66/80cc but it's Chinese BS and they are all ~66cc in actual displacement.

Was this an experienced builder with multiple builds, or just a guy that built a bike and couldn't make it run right so he dumped it on Craigs?

First of all, the gentleman told me to use 1/4 to 1/2 an ounce every time I fill the 1/2 a gallon tank.
Well there is a huge red flag warning right there.
It is in your best interest to just get a 1 gallon gas or two for bike use and mix good quality gas with your average auto supply stores 2-stroke oil as mixing 'in the tank' is always ifffy.

32:1 is a good mix, that is 4 oz (1/2 a cup) of 2-stroke oil to a 1 gallon of gas.
Your builders advice even at 1/2 an ounce to you 1/2 gallon tank was absurdly low at 128:1 and liable to toast your engine in short order.

The muffler continually comes off. AHHH. It's a relatively cheap and simple $29.99 muffler. I've tried everything. Different bolts. Clamping it in place. Nothing works. I just set out after the latest try. It sounded beautiful. Few vibrations. I had NICE SPEEDS without feeling fear. Then BOOM all of a sudden it got super loud and started vibrating again.
Trying to run at a 128:1 mix will do that and the damage may already be done.

Last but not least, I still cannot get this down right. So I usually ride without a muffler (I don't ride often) obviously. I don't like going too damn fast. I'm a scaredy-cat, okay?

It starts sputtering when I'm going slower. So I speed up because if I try to hold down the clutch, it almost always revs up.
Idle with the clutch in is idle, you set it on the carb not by the cable.

Hope that helps.
KC's Krusiers Builds
Reply With Quote