starting issues.......please help

[brucea382]

this may have been answered before but i cant find it.....heres the issue....motor cranks off of starter wants to start but will not.......after power kicking the kickstart several times it will eventually start.... also have idle issues....one minute it idles fine and the sometimes it either idles very high or very low to the point if cutting off. i have cleaned carb several times and still have same issue. its really wierd cause it runs pretty good once it starts up......on checking the spark it has it but not sure if its where it should be.......im gonna change CDI and coil but would like any advice you all have..........also i have search for the thread that zombie posted about switching to a different cdi where the plug and wires didnt match but he figured it out need that thread or one similiar.....thanks in advance for all help.....you guys have always come thru for me

which coil?
which CDI?

[245luigi]

idle set wrong?? maybe?

[naughty lee]

Clean and gap your plug to 0.9 mil.
Fire the bike up and take it on a run to get it hot. Bring it home and put the centre stand in a chock of wood to lift the rear wheel clear from the ground.
The carburettor has two screws
The large one for idle speed and a small one for air mixture.
With the bike running turn the idle screw fully clockwise.
The engine speed will increase and the back wheel will spin.
Next turn the small (air) screw fully clockwise (which will block the air off)
Quickly turn it counter clockwise one full turn.
This will prevent the engine from stalling due to air starvation.

Now, here's the important bit!
Continue to turn the air screw counter clockwise in half turns as you listen to the engine.
The aim here is to make the bike rev as high as possible.
Pause for up to twenty seconds between adjustments to listen.

Eventually you will let too much air in and the revs will drop, at this point turn the air screw clockwise to build the revs up.
Once you find the spot where the engine is revving its highest, turn the air screw a quarter turn clockwise to slightly richen the mixture.

Then put your screwdriver back into the other (idle screw hole) and turn it counter clockwise until the engine is just ticking over normally

Your mixture is now set. Any future adjustments to idle speed will only involve the large screw

[MaryK]

Changing the spark plug is a good and inexpensive idea.
But the carb. tuning problem may be due to fuel varnish buildup. 
If the engine operates, then adding a fuel system cleaner to the gasoline for several tanksful of gas may help.
I would use SeaFoam.  It cleans the system and stabilizes the fuel so that varnish is not increased.  And I have never heard of a problem caused by using it at recommended amounts in the fuel system.

A newer product Star Tron is also supposed to be effective but I haven't used it.
Techron is another fuel system cleaner that I have used but it has no fuel stabilizing capability and another product like
Sta-Bil would be needed when not riding the scooter much (winter) to stabilize the fuel.

scoot safely,
 

[brucea382]

thanks for all advice...........just wondering if its possible to be something other than the carb. i have the carb dialed in but it nevers has a consistent idle and what baffles me is sometimes with no adjustment it will idle very high or so low that it will cut off......is there any else i can check? one mechanic told me he didnt understand it either.......im confused LOL

[Vivo]

thanks for all advice...........just wondering if its possible to be something other than the carb. i have the carb dialed in but it nevers has a consistent idle and what baffles me is sometimes with no adjustment it will idle very high or so low that it will cut off......is there any else i can check? one mechanic told me he didnt understand it either.......im confused LOL

a vacuum leak? a stuck roller?