XR500 Black Fluffy Plug

J

juice_bruce

Member

Nov 27, 2007

25

0

• May 22, 2008

• #1

The spark plug on my XR500 gets carboned up very quickly.
I've cleaned and gone through the carb twice, all settings are stock.
Pull and test the plug, it appears to be a nice spark.
What happens is...
I start her, about a dozen kicks, best without the choke!
Then she'll idle nice and smooth.
I'll go for a ride and around mid to higher RPMs she, boggs, chokes and surges!
Pull the plug and it's carboned up.
I'm thinking electrical problem, any idea's?
Thanks,
Bruce

 

2

2strokerfun

Member

May 19, 2006

1,500

1

• May 22, 2008

• #2

I'm thinking fuel-related. Are you using fresh gas and new plug?? Checked valve clearance??

 

J

juice_bruce

Member

Nov 27, 2007

25

0

• May 22, 2008

• Thread starter
• #3

Yes, fresh gas, new plug, checked valves.

 

Z

ZOMBIE666

Member

Mar 24, 2006

324

0

• May 23, 2008

• #4

have you checked to make sure the choke is seating properly and sealing?

 

J

juice_bruce

Member

Nov 27, 2007

25

0

• May 24, 2008

• Thread starter
• #5

Zombie666,
Good call, the choke works perfectly at the carb and the cable moves smoothly...but when you pull the cable then push it off the choke remains about 1/3 on!
I still have some issues, but the plug isn't carboned up.
I'm going to tweek the carb and she how it goes. Will post more info soon.
Thanks