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Apr 16th, 2007, 06:44 AM
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#1 | | Newbie
Join Date: Apr 2007
Posts: 1
| Hello, New Guy Needs Help
Have A 98 Evo, Just Installed New Plugs @ .040" New Wires And New Coil As She Was Popping Out The Exhaust When Cold And I'd Get A Spit Out The Carb After Decelerating Then Getting Back On The Throttle. Ran Great At First With The New Parts But After 50 Miles Starting Doing It Again. Runs Ok After An Extended Warm Up (15 Minutes But Seems Low On Power And Still Spits After Decel Then Back On Throttle. What Should I Do?
Last edited by CSECORA; Apr 16th, 2007 at 06:47 AM.
Reason: mis-spelling
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Apr 16th, 2007, 08:57 AM
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#2 | | Administrator Frequent Posting Club
Join Date: Jan 2005
Posts: 1,548 Model: Harley FLHX Interests: Harley's, Saltwater fish tanks, and inventing new ways to keep busy. Occupation: Web Specialist by day, 25+ years of carb building by day, hey what happened to my day?!
| Couple of things to look at. First make sure you don't have any vacuum leaks and that you have a good seal at both the intake and your exhaust flanges. Check your connections at your VOES switch as well. If you have done any adjustments to the carburetor make sure you have the mixture screw adjusted correctly.
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Bike Talk Motorcycle Forum Admin | |
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Apr 16th, 2007, 10:33 AM
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#3 | | 200+ posts and climbing
Join Date: Apr 2007 Location: Central Valley, CA
Posts: 255 Model: 2005 RoadGlide, 1996 RoadKing, 2005 Delu Interests: Motorcycles, Grandkids Occupation: HD Service Tech
| Sure does sound like an air leak. While it's idleing, spray some WD40 on the seals of the intake mainfold. If the motor starts to stumble or decrease idle, you've found the leak. Don't get too carried away with the spray and get it up into the back of the aircleaner or it will surely stumble.
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Apr 16th, 2007, 01:54 PM
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#4 | | Has posted 500+
Join Date: Apr 2006 Location: Charlotte, NC
Posts: 1,211 Interests: Anything outdoors (climbing, backpacking, fishing, Mtn biking, riding) Occupation: Chemistry teacher
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Have a '96 FLSTC. Mine acts the same when cold, during the cold weather. I checked for intake leak, and also the enrichner for it sticking on, but nothing. She's just cold natured... As soon as she warms up, it's balls to the wall... Don't know... Maybe she's cold natured...  | |
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May 2nd, 2007, 11:03 AM
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#5 | | Newbie
Join Date: Apr 2007 Location: Louisiana
Posts: 9 Model: 2005 Electra Glide Interests: Riding
| Did you buy the bike new? And how long have you had it when it was running good? Most of time, and it is my experience, not opinion, that popping and caughing is fuel/air related. Aslo, is it Carbed or injuected? | |
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Sep 19th, 2007, 12:39 PM
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#6 | | Moderator Has posted 500+
Join Date: Feb 2005 Location: Liberty Hill Texas
Posts: 794 Model: 94 FXDS Dyna-Custom Interests: Scootin' & shootin'! Occupation: City Government / Administrator
| 98...carbed...
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Sep 19th, 2007, 02:31 PM
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#7 | | Moderator Has posted 500+
Join Date: Jul 2005
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Sep 19th, 2007, 02:55 PM
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#8 | | 200+ posts and climbing
Join Date: Aug 2007 Location: san leandro ca
Posts: 213 Model: 02 fxdx Interests: harley,pool,darts Occupation: maintenance mechanic
| if it starts pretty well you could try advancing the timing a degree or two it might make it run a little warmer | |
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Sep 19th, 2007, 06:54 PM
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#9 | | Newbie
Join Date: May 2006 Location: San Antonio Texas
Posts: 9 Occupation: Pro TIG welder
| popping on decel
I had the poping trouble once>>it turned out to be the round exhaust gaskets in the heads>>I put in the screaming eagle exhaust gaskets in along with stainless steel flat washers & stainless 5/16 nuts & lockwashers& it was cured>>have about 8500 miles with this setup | |
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Sep 19th, 2007, 11:59 PM
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#10 | | 200+ posts and climbing
Join Date: Oct 2005 Location: West Texas
Posts: 306 Model: '68 FLH, '99FB,'02 RK Interests: riding,custom paint, pinstriping. Occupation: retired
| It is more than likely one of the things mentioned above, vacuum leak or carb. What kind of carb are you running? If you try all the above suggestions and none of that works than my guess would be valve timing, possibly a slightly bent stem, that is not too likely but then again you run into all kinds of strange things. I assume you are running hydraulic lifters you could check them to make sure none of them are colapsing and readjust the pushrods. AL | |
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Sep 20th, 2007, 07:39 PM
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#11 | | 200+ posts and climbing
Join Date: Apr 2007 Location: Central Valley, CA
Posts: 255 Model: 2005 RoadGlide, 1996 RoadKing, 2005 Delu Interests: Motorcycles, Grandkids Occupation: HD Service Tech
| Quote:
Originally Posted by bikerjim1  98...carbed... | Fuel Injection came out in 95. Could be injected also.
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Life may not be the party we hoped for,
but while we're here let's ride....
Last edited by VYBR8ER; Sep 20th, 2007 at 07:41 PM.
Reason: second thought
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