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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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Old 03-28-2010, 02:55 AM
ryanstoyz ryanstoyz is offline
Motorized Bicycle Newbie
Join Date: Mar 2010
Location: colorado
Posts: 5
Default New to the motor biking

So I bought my first bike yesterday rode it today for about 20 miles. The guy I bought it from knew alot about building his own bikes. He told me a bit of information about it. I live in the mile high City and my moter has less than 30 miles on it. It is an 80cc motor. My biggest questions are what type of mix do I use for the engine he gave me a 50 to 1 mixture. And do i need to get my carb adjusted for the thin air. After riding it today I think that it is great and I cant wait go get back on it. Any Help or information would be great. Thanks Ryan
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Old 03-28-2010, 07:07 AM
Bikeguy Joe Bikeguy Joe is offline
Godfather of Motorized Bicycles
Join Date: Jan 2008
Location: up north now
Posts: 11,531
Default Re: New to the motor biking

If you have a good synthetic oil in the mix 50:1 is O.K., but not ideal for break in. I would shoot for around 32:1 for break in and then go to 50:1 with synthetic.

You shouldn't have to adjust your carb for the altitude if it is running O.K. now. Have a look at the plug- it should be brown or slightly black, not grey or white.
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Old 03-28-2010, 03:48 PM
macattie88 macattie88 is offline
Motorized Bicycle Elite Member
Join Date: Dec 2009
Location: columbia sc
Posts: 102
Default Re: New to the motor biking

i use opti2 at 100:1 and it works great
you want the cant handle the truth
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