How fast can your 80cc really go?

The stock one- 44T.

If you have no hills and are under 200 pounds, a 40T would seem ideal.

I have a 36T going on the next build and I don't think I will see any higher that 40-43, since the CIF bicycle motors don't have enough tourque to pull any faster.

If you decrease the number of teeth on the rear sprocket, there will come a point of diminishing returns where the engine just won't pull any more....unless youare going down hill.

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If it ain't broke, and you mess with it long enough, it will be.

freshwater, how much do you weigh?
Will you ride in stop and go alot?
Do you have many hills to climb?
What speed are you looking to cruise at?

I weigh in at a whopping 135 lbs and the stop and go is pretty moderate, not too many hills around my area and I think the ideal cruising speed for me is around 20 to 25 mph... is that speed asking for too much from my motor with stock sprocket?

Your stock sprocket will be ideal for those conditions. If you had less stop and go (like I do here in the boonies) you could go to a 40T no problem.

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If it ain't broke, and you mess with it long enough, it will be.

O.K., I just went for a spin on the "borrowed bike"- "80cc" of unknown dealer, 44T sprocket, 24:1 mix and the GPS read 28.5 mph.

It was 62 degrees F, no wind, and I made a run both ways for at least 30 seconds of WOT after I sensed no more speed gain.

The speed at which the engine "seemed comfortable" was 20 mph.

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If it ain't broke, and you mess with it long enough, it will be.

Ive gone 38mph. on flat ground with a 36 t sprocket and some porting and tuned pipe! but can cruise 33 mph comfortably all day !

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" We cannot live through a single day without making an impact on the world around us. And we all have free choice - what sort of difference do we want to make?" ~Jane Goodall~

27t sprocket rollin on 20s im about 260 lb. i know fat man on a little bike right. and i can hit 35mph with the engine quiting on me but i have yet to port exhaust . which im sure is the money maker for these things

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MEASURE ONCE AND CUT TWICE.......WAIT A MINUTE

ebmvegan, I HAVE GOTTEN OUT OF A BUNCH OF SPEEDING TICKETS BECAUSE OF INACCURATE SPEEDO. WOULD TAKE VEHICLE TO SPEEDO SHOP AND GET A SLIP SAYING SPEEDO WAS OFF ENOUGH TO COMPENSATE FOR MY OVER THE LIMIT SPEED. TAKE THE SLIP TO THE COURT OFFICER BEFORE COURT DATE. SOMETIMES THEY WANT A SLIP STATING IT HAS BEEN CORRECTED.(THIS MEANS YOU HAVE TO PUT THE CORRECT GEAR BACK INTO THE TRANNY ) THIS ONLY WORKS ONCE PER VEHICLE. MY 49CC FRICTION DRIVE WITH 1 1/4 INCH DRIVE ROLLER DOES 35MPH WITH 180 LB DRIVER . IT COULD USE A MUCH LARGER DRIVE ROLLER. I GO 280 AND IT STARTS ME IN THE GRASS WITH A HALF TURN OF THE PEDDLES. LOTS OF POWER. BUT WHEN YOU GET TO 35 OR MORE I THINK THE WIND RESISTANCE IS A BIG PROBLEM !!! WHAT IS THE CONSENSUS OF OPINION ON WIND RESISTANCE ?? RON

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PUMP YOUR BRAKES
NEVER BEAT ON IT, GET A BIGGER HAMMER

I've had my stretch (heavy bike) up to 42mph. Down hill with a tail wind...

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You do not need a parachute to skydive.
You only need a parachute to skydive twice.

I had one up to around 42-3 and it was screaming!!!! It was down a slight hill.

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If it ain't broke, and you mess with it long enough, it will be.