idle jet question
#1
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I bought my 05 heritage used so I dont know whats been done to the carb. It had slipons and a high flow airfilter installed. I replaced the slip ons with v&h big shot longs. The plugs are white so its a little lean (runs perfect)but when I start it in the mornings I warm it up for about 5 minutes but it still idles low until I ride it about 5 more miles. Then its up to normal idle speed. I can shut the bike off for 10 minutes and its idling low again till I ride a few more miles. It will do this all day. Is that normal for harley cards or do I need some adjusting. The air/mixture screw is 2 turns out also. I have the idle speed a little high now because if not it was shutting off without holding the throttle cracked or using the enricher while hot till I rode it like I stated above.
#2
#3
#4
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Its done it in any temp. Its been in the 100s and lately its been in the 60s for the mornings. When I got it I ran a bottle of seafoam through it but thats all thats been done to it. I let it run about 20 seconds with the enricher all the way out then warm it up for 4-5 minutes with it about half way out.
Blob, I will back the screw out some more and see if that helps.
Blob, I will back the screw out some more and see if that helps.
#5
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Slower idle is normal after cool down, they cool down fairly fast especially in cool weather. Stock pilot jet is #45. An aftermarket #46 works the best for me but your air filter could make a difference. Harleys next step is as #48. Adjust the airscrew to the fastest idle when the engine is hot, but maintain a slow idle speed when adjusting for best results. If its not spitting back thru the carb after its warmed up, its probably fine. Ride it, get a good feel about it before you start making changes. It will let you know.
Last edited by Mikey 1450; 09-18-2011 at 09:59 PM.
#6
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As the guys have said, try turning the a/f mix screw out first. I would go a quarter turn at a time and ride it to see how it goes. Once you go to 3 turns out you may have to go to a larger pilot jet. Like Mikey said, 45 is stock, then 46 and 48. I don't think the dealer carries the 46 but you can get it here.
#7
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Since you don't know, I would definitely remove the float bowl and see what jets are in there (and also check to see if the pilot jet is clogged). It's not difficult and only takes a few minutes. I think 190 main and 48 pilot are the norm for high flow intake and exhaust.
I had the same issues you're describing, plus it would cough and stumble once in a while accelerating from a stop (plus it would kick back on me sometimes when starting it back up after gassing up). I pulled the float bowl to see if it was jetted too lean. I found that it did have a 190 main and a 48 pilot, BUT the pilot jet was about 70% blocked/clogged. After I cleaned it and put it back together, solved the issues plus it made a world of difference in bottom end torque.
Pilot jets have really small holes, and it's not uncommon for them to get partially blocked/clogged. Often times, people will rebuild the carburetor (cleaning the pilot jet in the process), when all that really needed done to solve the problem was clean/clear the pilot jet.
I had the same issues you're describing, plus it would cough and stumble once in a while accelerating from a stop (plus it would kick back on me sometimes when starting it back up after gassing up). I pulled the float bowl to see if it was jetted too lean. I found that it did have a 190 main and a 48 pilot, BUT the pilot jet was about 70% blocked/clogged. After I cleaned it and put it back together, solved the issues plus it made a world of difference in bottom end torque.
Pilot jets have really small holes, and it's not uncommon for them to get partially blocked/clogged. Often times, people will rebuild the carburetor (cleaning the pilot jet in the process), when all that really needed done to solve the problem was clean/clear the pilot jet.
Last edited by pnw_hd_rider; 09-19-2011 at 10:27 AM.
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