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  #1  
Old 8th February 2009
Brandon Richrdella Brandon Richrdella is offline
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Default fouling of plugs after a couple minutes of riding.

hello we had a touch of spring here in chicago. 60 outside. well i starterd my bike and was riding aroubd the block and it was foulong out the plugs. it has a super b carb with drag pipes kick only. but after i cleaned off the plugs she would start in 2 or 3 kicks. i could fell the bike running strong but after a couple mins it would stutter and no power. then shut down. i dont know? any help please.
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Old 8th February 2009
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If you used the choke to start it, and let it idle with the choke on for a few minutes, that would foul the plugs. So what was your starting procedure? Should use the choke only to get it running, then choke off and use the throttle or throttle lock to keep it running.

Otherwise:
Was it running well before this?
What slow jet is in the carb, and how many turns out on the pilot screw?
[I am not familiar with that carb but others here are].
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Old 8th February 2009
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How long are you leaveng the enrichener on?
Are the plugs oil fouled? or fuel fouled?
First check the air cleaner and make sure it's clean.
Check the compression, if it's low, spray some WD-40 in the spark plug holes and let it sit overnight. If it's fuel fouled (black soot on the plugs) make sure you're not riding with the enrichener on, and pull the float bowl and spray out the jets and needle & seat with some carb cleaner. Also remove the enrichener and spray it out. There may be some varnished gas or dirt keeping it from seating.
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Old 8th February 2009
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Quote:
Originally Posted by Brandon Richrdella View Post
hello we had a touch of spring here in chicago. 60 outside. well i starterd my bike and was riding aroubd the block and it was foulong out the plugs. it has a super b carb with drag pipes kick only. but after i cleaned off the plugs she would start in 2 or 3 kicks. i could fell the bike running strong but after a couple mins it would stutter and no power. then shut down. i dont know? any help please.
Dry fouled or wet-fouled?

Is it oily?
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Old 8th February 2009
Brandon Richrdella Brandon Richrdella is offline
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its gas they are wet fouled. and the piolt screw is 2 1/2 turns it idles awsome and i cleaned every thing on the carb. its only after i ride it a little i feel it start to sputter. i got the bike on a trade and the guy i got it from got it on a trade. so i put some plugs and a battery and she fired up. cleaned the carb and idled and ran great but now 2 months later this.
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Old 8th February 2009
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Quote:
Originally Posted by Brandon Richrdella View Post
its gas they are wet fouled. and the piolt screw is 2 1/2 turns it idles awsome and i cleaned every thing on the carb. its only after i ride it a little i feel it start to sputter. i got the bike on a trade and the guy i got it from got it on a trade. so i put some plugs and a battery and she fired up. cleaned the carb and idled and ran great but now 2 months later this.
Just sounds pig-rich....a tuning is in order....
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Old 8th February 2009
Brandon Richrdella Brandon Richrdella is offline
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ya thats what i am thinking. i just gonna take it in. this carb is agervating me. if anyone has any other imput please let me know. thnanks everyone brandon
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Old 8th February 2009
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2,1/2 turns out on the pilot screw is too much. What i would do is:
  1. turn it in until gently seated then out 1,1/2 turns
  2. run the engine until it is warmed up
  3. set the idle speed at about 1000 RPM
  4. counting by 1/4 turns as you go along, first turn the pilot screw in until the idle becomes a little rough, then turn it out, letting it go thru even idle, until it gets a little rough again
  5. set it in the middle of the two spots
This process is a little trickier than it sounds. You have to be careful to not burn your fingers on hot engine parts; listen carefully to the idle quality; enjoy all the damn noise!

First read the Stickys on carbs. There is one on cleaning, another on tuning, whatever.
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Old 8th February 2009
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set the pilot screw the way Mick says....... but I don't think 2 1/2 turns out is that bad..... since it idles okay but fouls while riding I would be looking at the main jet..... sounds like it's too big (cuz you're sure you're not riding with the choke on)

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Old 8th February 2009
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Quote:
Originally Posted by racerwill View Post
set the pilot screw the way Mick says....... but I don't think 2 1/2 turns out is that bad..... since it idles okay but fouls while riding I would be looking at the main jet..... sounds like it's too big (cuz you're sure you're not riding with the choke on)

Ww
I dunno - he said it fouled riding around the block in the first post.

And adjusting the primary will tell him - if, after setting it properly, he's STILL fouling plugs, YEAH THEN look at the main...
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