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16th August 2012
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Know It All
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Join Date: Jun 2012
Posts: 178 Sportster/Buell Model: XLH Sportster/Buell Year: 1977
Reputation: 51
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Quote:
Originally Posted by IronMick
Blistering hot is good for setting the idle [unless it prevents you from doing a good job of it]. You had it set correctly for idle so put it back. Next you need to install a larger slow jet to solve the acceleration problem.
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Could the slow jet just be dirty? Basically trying to decide if I should:
a) order a jet, wait for it to arrive, then disassemble the carb
or
b) disassemble the carb, clean it and see how things look
__________________
I'm just a newb with an ironhead, a toolbox, a computer and a FSM.
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16th August 2012
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Banned
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Join Date: Apr 2011
Location: Deep South
Posts: 1,613 Sportster/Buell Model: XLH Sportster/Buell Year: 1976
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Takes maybe 30 minutes to disassemble, clean, and reassemble.
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17th August 2012
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,730 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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+1
Do [b]
But spend more time, maybe a couple of hours. See the carb cleaning Sticky for how to make a simple carb stand. Makes the whole process better and more accurate.
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17th August 2012
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Know It All
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Join Date: Jun 2012
Posts: 178 Sportster/Buell Model: XLH Sportster/Buell Year: 1977
Reputation: 51
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Ok...
Got the carb cleaned. The slow jet was most definitely gunked. Everything is reassembled. But I've got one question:
When I pulled the carb from the manifold it had an o-ring AND a gasket. The FM only shows an o-ring. The gasket looks like crap, so if I don't neeed it everything is going back together without it.
What say the great IH minds?
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17th August 2012
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Custom Bike Builder
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Join Date: May 2009
Location: 37° 17' 45" N by 79° 53' 49" W
Posts: 2,459 Sportster/Buell Model: XLCH Sportster/Buell Year: 1975
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this is how i have my S&S set up, no gasket, just the o-ring.
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steal your face right off your head!
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17th August 2012
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,730 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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My '78 had both when i got it 3 years ago. I asked on this forum, then discarded the gasket. Since then the special-shape o-ring broke so i am using just the gasket.
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17th August 2012
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Know It All
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Join Date: Jun 2012
Posts: 178 Sportster/Buell Model: XLH Sportster/Buell Year: 1977
Reputation: 51
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So i put everything back together, but it's still stalling around the 20% - 40% throttle area. By running it richer and richer I can shrink the dead zone, but it's there all the time. With pilot about 2 turns out it's ridable, but still has a dead spot, all though it's small enough to work around. But I'm definitely super rich. Fouling the front plug and BURNING through gas. Maybe getting 15MPG.
Took the carb back out and made sure to clean (as best i could) the slow and bypass circuit of the carb.
No change.
Thoughts?
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17th August 2012
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Biker
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Join Date: May 2012
Location: Halifax NS
Posts: 38 Sportster/Buell Model: XLH Sportster/Buell Year: 1973 Other Motorcycle Model: Honda CB550 Other Motorcycle Year: 1974
Reputation: 11
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No offense but check basics: oil level? clogged air filter? fresh gas? air leaks?
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17th August 2012
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Know It All
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Join Date: Jun 2012
Posts: 178 Sportster/Buell Model: XLH Sportster/Buell Year: 1977
Reputation: 51
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Quote:
Originally Posted by Kingrabbit
No offense but check basics: oil level? clogged air filter? fresh gas? air leaks?
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None taken. Everything checks out. |
17th August 2012
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Rider Of The Iron Steed
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Join Date: Dec 2003
Location: London, ON Canada
Posts: 23,730 Sportster/Buell Model: XLH Sportster/Buell Year: 1978
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There is no point in messing with the pilot screw setting. Set it according to the Sticky and leave it there.
If you are at greater than 1 turn out on the pilot screw you can go to a larger slow jet, which may solve the problem.
Review please: what carb? what main jet? what slow jet? how many turns out on the pilot screw?
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