Post by indymoped on May 29, 2013 20:14:32 GMT -5
Hard start suggests possible valve adjustment but I would do a proper idle adjustment first.
This is taken from a thread from scootdawg. I do not take credit for it.
ADJUSTING YOUR FUEL RATIO SCREW:
FOLLOW THIS PROCEDURE, take your time DO NOT Be turning the SCREW fast and wait in between turns otherwise you will be off.
Warm Up the SCOOT for at least 5 minutes.
YOU WANT THE HIGHEST IDLE OUT OF THE FUEL RATIO SCREW YOU CAN GET.
ADJUST YOUR FUEL RATIO:
1. Turn the Fuel Ratio Screw Counter Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.
** IF ON THE FIRST TURN IT DOES NOTHING OR IDLE GOES DOWN- GO to 2.*** Otherwise GO to a. below.
a. If the IDLE GOES up repeat 1.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.
2. Turn the Screw Back 1/4 and GO to 3..
3. Turn the Fuel Ratio Screw Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.
** IF ON THE FIRST TURN IT DOES NOTHING YOUR PILOT JET AND OR PASSAGES ARE CLOGGED*** GO to CLEAN CARB*** Otherwise GO to a. below.
a. If the IDLE GOES up repeat 3.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Counter Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.
FINISH UP:
SET IDLE USING IDLE SPEED SCREW:
USING the IDLE SPEED SCREW set the Idle to 1500-1800 where it IDLES the smoothest AND the REAR WHEEL IS NOT Spinning-
TEST YOUR ADJUSTMENT:
Now while on the Center Stand GIVE THE THROTTLE a GOOD QUICK TWIST and Let go,
It should REV UP with with a nice VROOOOOOOOOM with no Bogging or Hesitation and Come back down to where you set your Idle.
This is taken from a thread from scootdawg. I do not take credit for it.
ADJUSTING YOUR FUEL RATIO SCREW:
FOLLOW THIS PROCEDURE, take your time DO NOT Be turning the SCREW fast and wait in between turns otherwise you will be off.
Warm Up the SCOOT for at least 5 minutes.
YOU WANT THE HIGHEST IDLE OUT OF THE FUEL RATIO SCREW YOU CAN GET.
ADJUST YOUR FUEL RATIO:
1. Turn the Fuel Ratio Screw Counter Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.
** IF ON THE FIRST TURN IT DOES NOTHING OR IDLE GOES DOWN- GO to 2.*** Otherwise GO to a. below.
a. If the IDLE GOES up repeat 1.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.
2. Turn the Screw Back 1/4 and GO to 3..
3. Turn the Fuel Ratio Screw Clockwise 1/4 and wait 10-15 seconds to allow the engine to catch up with the new setting.
** IF ON THE FIRST TURN IT DOES NOTHING YOUR PILOT JET AND OR PASSAGES ARE CLOGGED*** GO to CLEAN CARB*** Otherwise GO to a. below.
a. If the IDLE GOES up repeat 3.
b. If the IDLE does not go up or it does nothing turn the Fuel Ratio Screw 1/8 Counter Clockwise that should be the highest IDLE you can get out of the Fuel Ratio Screw-- GO to FINISH UP.
FINISH UP:
SET IDLE USING IDLE SPEED SCREW:
USING the IDLE SPEED SCREW set the Idle to 1500-1800 where it IDLES the smoothest AND the REAR WHEEL IS NOT Spinning-
TEST YOUR ADJUSTMENT:
Now while on the Center Stand GIVE THE THROTTLE a GOOD QUICK TWIST and Let go,
It should REV UP with with a nice VROOOOOOOOOM with no Bogging or Hesitation and Come back down to where you set your Idle.
is small. Normally stock is 80-82 which is running them very lean so they pass emissions. You should be able to run an 
with a free flow air filter to have a goof a/f ratio. A BBK scooter will run 92-98+ depending on how highly modified and what fuel you are running. Anyways the jet is not the problem. If the carb came with a fuel enricher on it try switching it out for your old one. It could be faulty and cause overfueling....
. I know mixing 30% xylene or toluene will increase octane to about 98-100 but I don't feel that I should have to be running that high of octane on a mostly factory scoot. I don't think there would be any cracks in the rubber but will check on that. I don't think its a lean issue because the plug looks great but i will try up-jetting since it never hurts to be more rich than lean. Lowering the timing would not help the issue. Advanced timing will actually help an engine run cooler so lowering the timing wouldn't help since i am not having any problems with pinging or detonation. (its a stock cdi so the timing is pretty mild already.)