Fuel mixture screw

[gabsdad8]

How many turns out is a good starting place for a 4 stroke 49cc Huasheng engine? Thanks for any replies. Bill Talking about the idle jet needle... I

 

[Chainlube]

3/4-1 1/2 is a good starting point. Your altitude has to be taken in to consideration.

Take your chain off and start it up, get it warm and then start tuning.

 

[michael whiteman]

I've got the same engine and I don't take the chain off. You set the idle mixture with the engine at idle so the clutch had better not be engaged. You might hold the brake if the bike is trying to go forward. Once you've done it, it's not abig deal.

 

[Sidewinder Jerry]

Use a tachometer when making these adjustments. This way you know exactly what your engine is doing.

 

[gabsdad8]

Thanks a lot for all your responses. I'm at 6,500 ft

 

[Chainlube]

Thanks a lot for all your responses. I'm at 6,500 ft

Is all your riding at that altitude? Start at 3/4 turn out then.

 

[gabsdad8]

Will do! Thanks a lot, Chainlube and Sidewinder

 

[michael whiteman]

6500 ft ..............wow! You might be down on power a little but the good thing is the main jet in your carb is just fine. Mine came from the factory too lean to meet the EPA standards for America. I had to drill mine larger but seeing as you do not have as much air pressure where you live the leaner jet in yours should be perfect.

 

[gabsdad8]

Strange though - I've had to turn the pilot screw most of the way out.

 

[michael whiteman]

That is not a "pilot screw". It is an idle mixture screw. I was refering to the main jet in the center of your float bowl which is not adjustable.