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Posted

My Shee was running great for a few months and then it slowly developed a small sputter/bog if I'm just cruising along at a low RPM and pin it (or give it any sudden throttle). It's not a bad bog, it's just enough to create a small hesitation before the tires start spinning. I wasn't worried about it until I got into a few situations where I needed power "right now" and got it a half a second too late because of the hesitation...

 

My theory is that the warmer weather lately has caused it to run a bit rich and I need to take a bit of fuel out of that area of the carb. Problem is, I don't know if I need to mess with the needle, idle circuit, or what. I know it's not a main jet problem.

 

I'm running the stock carbs, mods in sig...

 

Any ideas?

Posted

Lean up your needle by moving the clip up one position. Also drain your float bowls, maybe theres a small bit of water in them due to condensation.

Posted

When you say a sputter/bog what do you actually mean? I like to think of a sputter as a rich condition. A bog is more of a lean mixture problem. If a sputter I would say riase your needle one position. If a bog I would say turn in air screws all the way. If better you may have a dirty pilot jet.

 

Chris

Posted
When you say a sputter/bog what do you actually mean?  I like to think of a sputter as a rich condition.  A bog is more of a lean mixture problem.  If a sputter I would say riase your needle one position.  If a bog I would say turn in air screws all the way.  If better you may have a dirty pilot jet.

 

Chris

402293[/snapback]

 

I suppose a hesitation is the best description of it, basically it does "nothing" for a split second, then goes crazy as it should.

Posted

Before I changed clip position, air screw or pilot...I'd take both carbs completely apart, clean the bejezus out of 'em...then freshly sync 'em back up.

 

Might be a good time to make sure there is no gunk in the bottom of your tank, too.

 

If it still hesitates...then...I'd start with the needle....it really depends on where the bog is...on the lower end of RPMs...probably just turn the air screw out 1/2 turn or so. (Less than 4K RPM)

If more in the mid...4K to say about 6K or so....then, Needle clip.

 

Good luck!

Posted

If you have not cleaned your carb in a while, I would start there since the problem does not seem to be a recurring issue. Make sure all jets are removed and cleaned preferrably with an air compressor. Install, Sync carb cables and then your idle and see what happens. If still prominent then drop your needle one position.

 

Chris

Posted

I'd even go as far as stripping some thicker speaker wire, taking a strand and gently running it through the smaller holes in the carb and smaller jets.....

 

Hell...if you're gonna do it...do it right!!

 

:dance:

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