I recently replaced my son's '03 XR100 with an '04 RM85L. This is the first 2 stroke in the family (I ride a yzf). I'm mixing about 4oz per gallon of yamaha 2 stroke oil. After our first moto practice (where the bike ran great) it became hard to start. I checked the plug and it was totally spooged. I drained the carb, diluted the fuel a bit, and replaced the plug. Good to go. Yesterday at practice the bike started and ran fine until a stall in our second moto. could NOT restart the bike... plug is fouled.
I need to understand the basics here. Any help is appreciated as always.
Happy holidays
dan