80cc stalling out after 10 mins

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biknut

biknut

Well-Known Member
Sep 28, 2010
6,631
409
83
Dallas
I have a 36T on my bike, and it will do 35 mph, but it's running 7000 rpm to do it, which you could consider the red line.

If you cruise around at the red line all the time, your motor isn't going to last very long. Im comfortable cruising at 30 on it, but it likes 27 better. 24 is even better. There are times when I'm in traffic running 35 on it, but I try to limit that as much as possible.

Stuff likes to come loose at those speeds.

Bolts
Screws
Fillings
Mufflers

At 30 not so much
At 26 hardly at all.
 
njkl44

njkl44

New Member
Sep 1, 2012
9
0
0
Durango
biknut said:
Go with the 41T for now then. 32T is way too tall for a stock motor.

With a 41T you'll be able to do about 31-32 mph.

This is how fast a 40T goes. A 41T will be about 1 mph slower.

26x2.125 tire 81.8" circumference

40T sprocket

RPM MPH

1000 4.7
1200 5.7
1400 6.6
1600 7.6
1800 8.5
2000 9.4
2200 10.4
2400 11.3
2600 12.3
2800 13.2
3000 14.2
3200 15.1
3400 16.1
3600 17.0
3800 17.9
4000 18.9
4200 19.8
4400 20.8
4600 21.7
4800 22.7
5000 23.6
5200 24.6
5400 25.5
5600 26.5
5800 27.4
6000 28.3
6200 29.3
6400 30.2
6600 31.2
6800 32.1
7000 33.1
Click to expand...
Awesome! I'll put this on tomorrow. Not what should a 44 tooth top out at? around 28 or so? How do I know if im getting 7000 rpm? So i should see a difference with the better gas?
 
biknut

biknut

Well-Known Member
Sep 28, 2010
6,631
409
83
Dallas
njkl44 said:
Awesome! I'll put this on tomorrow. Not what should a 44 tooth top out at? around 28 or so? How do I know if im getting 7000 rpm? So i should see a difference with the better gas?[/QUOTE]

With a 44T most people can do 28, but only after break in is complete.

My bikes don't get full power till after 350 miles, and I start running 40:1 or higher ratio.
Click to expand...
 
njkl44

njkl44

New Member
Sep 1, 2012
9
0
0
Durango
biknut said:
njkl44 said:
Awesome! I'll put this on tomorrow. Not what should a 44 tooth top out at? around 28 or so? How do I know if im getting 7000 rpm? So i should see a difference with the better gas?[/QUOTE]

With a 44T most people can do 28, but only after break in is complete.

My bikes don't get full power till after 350 miles, and I start running 40:1 or higher ratio.
Click to expand...
Looks like I just need to ride it for while :)
Click to expand...
 
H

hondaracer420

New Member
Mar 24, 2013
1
0
0
bloomsburg p.a
I just ordered a 80cc 2 stoke t80 kit an the seller isn't any help at all at what fuel ratio I should put in it an I need advice on how to make a off set carb cuz I'm puttin it on a next avalon an its very cramped
 
crassius

crassius

Well-Known Member
Sep 30, 2012
4,032
158
63
USA
couple ways - saw intake in two pieces & join them with a short piece of rubber hose that will take fuel (use two hose clamps), put carb on and tie it to bike frame with a zip-tie to hold up its weight - or get an extended intake off the net that will bring the carb out the right side of the frame (usually about $8)

on the avalon, be careful in getting the front mount solid & you might want to disable the rear spring with a piece of pipe inside
 
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