I have a question. How long do you keep the enrichener open during warmup? I've had a fouling problem and have started using the throttle lock after a few seconds.

 

I'm in SoCal so I don't experience too many very cold weather starts, but I do the same thing. Leaving the choke on too long, as it delivers less air and more fuel, can foul your plugs. Basically I use the choke just to get the motor to fire but only leave it on for about ten seconds or so. After that it's all throttle control.

 

I pop the throttle once or twice and them pull the choke out as I'm hitting the start button,after it starts up the choke is only on for 10-15 seconds at tops.

 

In the cold i may run allday with it 1/2 way, When it is hot stop drop and roll!

 

All the way out when I fire it up then drop it to half within a couple of seconds and leave it a half till I get to the end of my neighborhood at the main road. If it is warm then I shut if off when I start rolling.

 

If I leave mine on that long I'll foul plugs and I don't understand why. For 8 years I've never had this problem. Since using the lock after a few seconds the fouling has stopped. Have already cleaned, jetted and adjusted mixture. I'm confused

 

Only think I can think of is you are a bit too rich.

Of course I only do that when it is in the low 30's. Other then that it is just a few seconds and I am on the throttle rolling.

 

i just use it to get her running,then use the pin wheel to let her warm up,i had the same problem fouled plugs.

 

This is an example of a bike jetted too lean. Intermedate jet needs to go up a notch.