Re: LT 50 Restrictor Plate \"Raptor720 \"
After pulling the intake manifold restrictor out, my son's LT50A ran very lean. So lean that there were small bits of aluminum balls on the plug (from the piston). Oddly enough, I couldn't hear it detonating, and the plug was always a light brown color.
I tried pulling the main jet and it was just pig-rich. Even with the air filter and exhaust "drain" plug removed.
I went out and found some numbered drill bits, but was unsuccessful in achieving the right jetting.
The OEM main is a 55, and my local Yamaha dealer found me a 65 and 70 main. I drilled a few 1/4" holes in the airbox cap, and it runs great with the 70. The downside is the extra intake noise, I think it just might be louder than the exhaust.
After getting around to removing the oil injection and replacing the muffler, I'd like to fabricate a real airbox. An open element would easily drown out in some of the larger puddles he likes going through (it already does sometimes).
Cool Graemlin!: [img]images/graemlins/scs.gif[/img]