Rough Riding at lower speeds

It seems to be runing better with the new spark plug. I think the mix could be to rich to as it seems it's not burning everything up compelty.

Now that the warmer weather is coming I want to put a smaller back sprocket on the wheel. I have a 48 tooth on it and I want to put a 44tooth on. How much of a speed gain would I get.

Also could my sprocket not be 100% aligned ? when I look @ the back wheel when I'm moving it has a slight back and forth wobble to it. Nothing extreme of course.

i slight side to side is ok its the up and down that stresses the chain and pops it off the sprocket. Your mix is important as is the E-clip setting after break in crappy running at low rpm would seem to be a rich mix issue but you would need to do like the guys said again now and run it hard for a while run WOT for a couple min close to somewhere you can let the motor cool off and check the new plug. if it is oily and rich move the e-clip up one (the e-clip is attached to the needle accessible thru the top of the carb where the cable comes out. My 66cc huffy was doing the same thing until i leaned out the motor i went thru 3 plugs in about 500km before i got it right.

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Ride it like you stole it!

Yeah but I always run it hard. I'm usually pushing it very close to it's max. I can't figure out how to move that clip piece up the needle or down without breaking the clip..pliers?

i would recommend taking the assembly apart by sliding the spring out of the slide and removing the sliver slotted disk then you can have the needle in your hand a small needle nose pliers will remove it from the pin move it up one notch and reassemble make sure you hold onto the spring as it may go flying

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Ride it like you stole it!

I had the entire thing apart and I could not get the clip up but then again I didn't try with pliers. Is there a chance I would not have to shorten the chain for a 44 tooth sprocket ?

4 teeth is about 2 links you make be able to adjust the idler pully that far if it wasn't at the top already

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Ride it like you stole it!

It's close to the top and I think I might be able to make up for the extra slack by pushing the pully closer to the back wheel. I need a new one anyway it's jiggles back and forth and that could be making the chain go from side to side alittle on the sprocket.

The throttle cable going into the carb. Moving the cable up more does what exactly ?

The clip slides off the needle with a sideways push, I don't even use pliers, just set it on the workbench (open side down) and push the needle down sideways.

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If it ain't broke, and you mess with it long enough, it will be.

Could the type of Oil be affecting the bike and making it run rough. I have this synthetic 2 stroke oil I'm using and I'm wondering if I should use actual oil made for 2 strokes engines.