Dumb ?

[blenker09]

so I put a new air cleaner on my scooter and now I can't get it in tune. Can anyone help me with this??
Thanks

[90GTVert]

You are going to need use a larger main jet most likely. Probably about 10-15% larger than stock I would guess. You'll also need to readjust your idle mixture. The needle clip may need to be moved up a notch.

Upjetting info if you scroll down here...
49ccscoot.proboards.com/index.cgi?board=yamajog&action=display&thread=556

Adjusting the idle mixture is fairly simple. Let the scooter warm up. Find the mixture screw. Adjust the screw about 1/4 turn at a time in either direction and let the engien "settle" at an RPM. You should find a spot wher ethe engine idles the fastest. Turn the mixture screw 1/8-1/4 turn towards rich (clockwise on a stock carb) to err on the side of rich. Adjust the idle to an appropriate speed with the idle speed screw. The mixture screw should be a small screw kind of inset and the idle speed screw should be a larger screw that sticks out.

[blenker09]

How do I find out what size jet i have now?

[2strokd]

It should be written on the jet. Stamped in it. Might need a scope to see it?

[blenker09]

ok thanks ill let you know how it goes