Mpg is waayyy low

fume555

New Member
Aug 24, 2008
19
0
0
Dallas,TX
I'm running full tank 20:1 still on my first gallon and after riding about 30 miles I'm already at half tank. This must mean I'm averaging 60mpg which is half of what kit said (150). Is it because of the oil mix ratio that causes it to burn up so fast? Is it normal to kill your engine by choking it all the way and is it normal if the engine itself smokes(not exhaust smoke)?


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Last edited:

Pablo

Master Bike Builder & Forum Sponsor
Dec 28, 2007
3,665
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Duvall, WA PNW
www.sickbikeparts.com
I doubt 150 mpg, but 60 mpg does sound like you are leaking or sucking raw fuel.

Expect maybe about 80 mpg on a bolt on sprocket HT engine set-up.

I would start reading on tuning.

New plug and wire.
Needle on lean slot.
Smaller carb jet.
Look for carb leaks, defects.
 

fume555

New Member
Aug 24, 2008
19
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0
Dallas,TX
How many gallons/miles does it take to fully break my engine in? My top speed as of right now is about 30 mph. How much increase will there be once my 80cc is broken in?
 

Ilikeabikea

Active Member
Jan 27, 2008
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Ptown, Texas
You should pick up another 3 to 5 mph. What you will really notice is how much smoother it runs and better acceleration......................
 

fume555

New Member
Aug 24, 2008
19
0
0
Dallas,TX
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It will take at least 2 tanks IMHO.

Unmodified? A couple more MPH. Maybe 35 or so.
So once I finished running 2 gallon tanks 20:1 mix, will it be time to switch to a different oil mix ratio? And what oil mix ratio should that be?

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