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Old 08-06-2011, 09:11 PM
The Busted Nut's Avatar
The Busted Nut The Busted Nut is offline
Motorized Bicycle Senior Member
Join Date: Aug 2011
Location: San Diego, Califronia
Posts: 96
Default Carb and oil questions...

I am trying to make my engine for endurance and long commutes. What oil brand and ratio do I use? I am also trying to keep the temp as low as I can.

By the way, I have a brand new raw 80cc slant angle.

I also was wondering, should I lean my carb one more notch? How will I know if I am running too lean or rich?
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Old 08-06-2011, 11:30 PM
rustycase's Avatar
rustycase rustycase is offline
Gutter Rider
Join Date: May 2011
Location: Left coast
Posts: 2,745
Default Re: Carb and oil questions...

There's quite a few people who are very excited about the Opti2 oil.
100:1 would make me nervous as a day in church!
I have no clue what they do for break - in...

Whatever you decide to run, probably best to leave the carby running fat until you at least run a tank of fuel through it. Of course all depending upon how you ride.
By the time you've gotten most of the way through that first tank you will know all about 4 stroking! lol
The engine just kinda burbles, loads up and stumbles all over itself instead of accelerating briskly and smoothly. When you begin leaning it out by messing with the main jet it will come alive, and you'll know it! :-)

Whatever you do, do NOT mix at 20:1 for break-in.
Our oils today are ALL better than when that was ever the right thing to do.

I can't recommend an oil because I'm non-discriminating... I'll run anything I can get my hands on at abt 30:1 and if it's something I like I'll run at abt 40:1 in an engine that's well broken in and running well.

Good luck!
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Old 08-07-2011, 12:12 AM
BeaverRat BeaverRat is offline
Motorized Bicycle Elite Member
Join Date: Jun 2011
Location: WA
Posts: 147
Default Re: Carb and oil questions...

Opti2 at 72:1 works great for me... There is no break in period if you use opti2. Just 72:1 right off the bat (or 100:1 if your feeling lucky).
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