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Forum: 125cc - 249cc

02-01-2013, 07:54 PM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

I notice rear tire does not turn unless scooter...

I notice rear tire does not turn unless scooter is over 2000 rpm.

Forum: 125cc - 249cc

02-01-2013, 06:23 PM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

Replace carburetor with new. Still have same...

Replace carburetor with new. Still have same problem. Cdi or coil? Could there be internal engine problem other than valve adjustment as I have adjusted and rechecked. Valves are ticking. It revs to...

Forum: 125cc - 249cc

01-31-2013, 08:36 PM

Replies: 6

racing performance cdi

Views: 12,465

Posted By yardog

racing performance cdi

Are these cdi any better than stock? Do they work any better than stock, if so do they advance timing @ idle or higher rpm? Do they effect how smooth engine idles?

Forum: 125cc - 249cc

01-29-2013, 04:03 PM

Replies: 1

vacuum petcock

Views: 8,696

Posted By yardog

vacuum petcock

Does it matter what position the petcock is mounted? (vacuum port up)(vacuum port sideways)(vacuum port down).

Forum: 125cc - 249cc

01-27-2013, 05:58 PM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

Took off petcock. Cranks and runs better but...

Took off petcock. Cranks and runs better but won't idle right. A/F does not have any effect on idle. Runs good @ 3000rpm but will die if turn down around 1500. It will be idling a 1500 and start to...

Forum: 125cc - 249cc

01-27-2013, 09:45 AM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

It won't run slow enough to adjust idle. Have...

It won't run slow enough to adjust idle. Have adjusted valves .004 intake and .005 exhaust, Could petcock be sucking fuel into intake manifold? Plug looks like running rich. Stock cdi and coil.

Forum: 125cc - 249cc

01-26-2013, 09:29 PM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

I replace plug with ngk. 24mm carb. new fuel....

I replace plug with ngk. 24mm carb. new fuel. getting good blue spark on plug. seems like may be back firing from intake. not sure when carb was replaced, probably a couple months. scooter purchased...

Forum: 125cc - 249cc

01-26-2013, 06:43 PM

Replies: 19

150cc running problem

Views: 28,847

Posted By yardog

150cc running problem

I have a 150cc jonway. Hard to start but it will start. Will not idle. Have to work throttle to keep running. It surges up and down with throttle in same position low rpm to high rpm. A few days ago...

Showing results 1 to 8 of 8

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