Question about Harley Davidson XL 1200 C Sportster Custom Motorcycles
Posted by Anonymous on
Hi Anonymous, popping is usually caused by air getting sucked in combustion chamber do bad intake seals leaking. Leaking exhaust gaskets can also be suspect. Remove air cleaner and backing plate, while engine is idling spray WD-40 or Brake Kleen around intake manifold to head area, if RPM's increase you have an intake leak and seals need to be replaced, also spark plugs will be burning whiter than normal. Good luck
Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e
Posted on May 12, 2015
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
SOURCE: Engine skipping & popping
sounds like a lean out condition... pull plugs and look at them if there white and sooty its to lean.... jet it up or replace baffles..i think your on the right track with backpressure theory!
Posted on Nov 20, 2008
Check out the:
They have answers regarding the Crank position sensors. THey do fail. the symptoms are poor off idle performance and sputtering. Valves have nothing to do wih it.
Posted on Mar 16, 2010
It sounds like the typical "lean from the factory" problems but let's check one other thing first. Take ht air filter off the bike leaving only the backing plate on it. With the engine OFF, crank the throttle wide open. When you do this, you should see a shot of fuel squirt from the brass nozzle in the mouth of the carb. This is the accelerator pump. If you don't see a shot of fuel squirt into the carb, the pump diaphragm is bad or there's trash plugging the hole that lets the fuel get to the pump.
If you do see the shot of fuel, you may simply have a carb set too lean. I'd go with a #48 or #50 slow jet in the carb. Maybe add a 0.020 inch thick washer under the needle to raise it up just that little bit enrichening the mid-range.
Posted on May 13, 2011
SOURCE: bike runs but back fires
You didn't say what year or model bike it is but I would guess, and that's all this is, that the rear cylinder is running lean for some reason. You may have an intake vacuum leak sucking air into the rear cylinder. That's my best guess.
Posted on Jun 02, 2011
Testimonial: "thanks that gives me one more thing to eliminate.appreciate it"
Tips for a great answer:
Jul 30, 2014 | 2003 Harley Davidson FLHTCUI Electra Glide...
Feb 04, 2012 | 2002 Dodge Intrepid
Oct 28, 2011 | Motorcycles
Feb 25, 2011 | 2005 Suzuki DR 650 SE
Jan 31, 2011 | 1996 Honda VT 1100 C2 Shadow Sabre
Aug 27, 2009 | 1996 Yamaha Royal Star XVZ 1300 A
Jul 25, 2009 | 2001 Cadillac Sts
Jan 02, 2009 | 2005 Suzuki Boulevard C90
58 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: