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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Tempreture and jetting
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[QUOTE="MikeT, post: 145916, member: 21398"] My bike, 1996 YZ125, has always run well, but lately it is blubbering a little and the plug is black. The recent rise in tempreture I know will make my bike run rich, but how many degrees is enough to make a difference? I know my bike is running rich because of the blubbering and black plug color. I did a full throttle hold and quick shut down to check the plug color and it came up black. My bike has one step leaner pilot jet and I raised the clip one notch. The rest is stock. Should I buy a new mainjet one size leaner and leave the clip where it is, or get a mainjet two sizes leaner and put the clip back in the middle? 1. Does one clip position equal one mainjet size? 2. How much does the tempreture have to go up to cause a need for a mainjet change? My manual says that my carb has a 350 main and for higher temps use a 340. Am I "simulating a 340 by moving the clip one position??? Also do you guys change your main nozzle or just the main jet? I'm wondering if I should do both at the same time? Thanks for your help MikeT [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Tempreture and jetting
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