[lykos23]

Originally Posted by qwertydude

You should take a GPS and measure the top speed on a level road with no wind you get with the various jets. One or two of them among your 92, 95 and 98 ought to give you a better top speed which will tell you what range you ought to be going for.

And the 38 pilot can be washing the plug clean. Are you able to adjust the idle mixture screw using the idle drop method? If not then you're too rich on the pilot jet and would be better off switching back to the 34. If your pilot jet is flooding your cylinder with gas at idle it can throw a proper plug chop off.

Because by the looks of it the 95 or 92 are actually closer to the jets you want. In fact it looks like the 95 you're getting carbon build up on the metal edges. On mine when I have them tuned perfect metal has no carbon build up and looks like a dull even brown no black spots or build up.

So far my highest speed I've ever attained on the scooter is 58mph with the 95 jet and my performance seems great. There was the slightest popping with the 92, but no more with the 95. I think the 95 might be the one. I also think I was too anxious and didn't go for a long enough drive for the first plug chops - I mean you can still see the result, but it's not that clear on the picture.

My stock idle jet wouldn't come down from revs. No matter what a/f setting I had it on it just wouldn't come down after giving it throttle. It was hard to start, and it sometimes died at stops. So someone on the forum suggested I try the 38 pilot jet and I got it from AbsolutelyScooters and all my problems were solved. Now I can actually adjust my a/f setting. I'm a bit confused as to what size the stock is. Is the stock 32, 33, or 34? Because the stock for 150cc scooters is 35, correct?