hesatation from idle  By  eric1021 (Read 1,990 times)

Pretty significant difference in the 49cc and the 63cc scooters, I have seen many 44mm pistons in 2011 Tao Tao scooters. You'd have to upgrade the motor to get yours as fast or faster than hers.

Sounds like you need a new clutch

i still struggle to tune my sccot so i may be wrong but it sounds like it is running rich. can one of the pros confirm plz. (the second run at the 25 second mark (for those too lazy to watch a whole vid ))

if a smaller piston is the problem as millsc has suggested then it's an inexpensive and easy upgrade. (if mechanically inclined) just time consuming especially if it is your first time doing a bbk. took me about 3 hours to do mine but i did take a few mini-breaks so you could probably install it faster.

WOW!! that thing is a dog, the power is not there even after it got moving you can hear there is no power. Has nothing to do with the clutch you can hear the motor it is down on power a lot.

Reason I asked if turning the fuel ratio mixture closed if it stayed running is because it appears it is getting to much fuel.
And if the Fuel ratio screw is closed and it keeps on running then it is getting to much fuel. The motors will usually start to die from 1 turn out. So Either your PILOT jet is to big or it is sucking in extra gas from some other place. Check your Vacuum hoses, I don't know if you have an EVAP system on it but especially check the Vacuum hose going to your petcock and see if it is wet from gas. Also check that the ENRICHER is shutting off the extra fuel.

I would also check the compression on the motor.
Alleyoop

One other thing you can try to see if more air will help it take the air filter off the air box and see if it runs stronger.
Alleyoop

yep tried that, had alot more hesatation on the stand. I will take a look at the petcock hose.
I also tried removing the plastic piece in the air box and the peice on the end of the filter as well to no avail.

Well a #80 Main jet for a stock 49 is to big I would put the jet that it came with back in. Rule of thumb is if you put on a free flow filter you put in a main jet 2 sizes bigger if then you also add a free flow exhaust you add another 2 sizes to it. So all together for both only go MAX 4 sizes up on the main jet. A lot of folks think dump a lot of fuel in to get more power and speed but the opposite is what happens.

If my memory severs me right the main jet on a 18mm carb is like a 72 some I have seen have a main jet in the high 60s.

Easy way to test your motors rpms is put it on the center stand and GIVE the throttle a full twist and let go. The RPMS should CLIMB FAST and drop down pretty quick to idle again. If twisting the throttle the rpms climb slow then something is not right. Either low on compression or running to rich. You should be able to give the throttle some quick little twists and the rpms should pop right up and down.
Alleyoop