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Old 01-11-2011, 04:00 PM
motorizedmatt motorizedmatt is offline
Motorized Bicycle Member
Join Date: Aug 2010
Location: Orange County CA
Posts: 37
Default Re: Preplexing Engine Issue

Originally Posted by 2door View Post
Try this for an engine kit in CA. Custom Motorized Bicycles / Bicycle Engine Kits / Los Angeles|

As for your problem there could be several things causing it. 2 cycle fuel, once mixed has a relatively short 'shelf life' A few weeks and it begins to go bad. How old is your fuel?
Have to looked at your spark plug? What color is the tip (electrodes and porcelain) It might be fouled. You'll want a nice dark chocolate color. If it's black and oily clean or replace it.
What fuel mix ratio are you using. With the milage you've reported it is well broken in so you should be doing something in the 32:1 range.
What has happened to the previous magnetos? Did they just quit or get wet? Is there any sign of oily residue inside the magneto cover?
There's several things to think about. Get back to us with what you find or have done to check this loss of power you're experiencing.
Thanks for responding Tom. The fuel is only about a week old, never any older than that.

I checked the spark plug out a couple of days ago and it was black but to me it didn't look that bad.

Im using 32:1 mixture. The old magnitos just died when I was riding somewhere. Tried to start em back up and it just wouldn't go, never got wet or anything I don't ride it though puddles or the rain. Last time I took the magnito out there was a really small amount of oil in the bottom of the case but the magnito wasn't wet at all. (probably just from my leaking gas tank that Piston Bikes sent me)
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