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  #16 (permalink)  
Old 07-15-2017, 06:13 PM
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Originally Posted by Captain America View Post
If it's popping out of the carb it's lean, out the pipes is rich, the condition of your plugs will tell you quite a bit also. When you twist the throttle are you getting a good pump shot that you can see? If you're accelerator pump well is clogged from dirt or not full because of an incorrect float setting you won't have much of a pump shot. That being said, what engine do you have and what ignition system are you using?
Sorry, I read this one at work and forgot to reply. I'm running a crane single fire. My engine is a custom built 80". I believe he called it an 83 or 84. The engine is bored .40 over with 10:1 compression and the thinner head gasket, so I think 10.25:1 compression. Also has the tallest cam without doing major head work, but I did have to put double valve springs in it. As far as the accelerator pump, yeah, I've watched when the bike is off, and it squirts just fine.
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  #17 (permalink)  
Old 07-15-2017, 06:41 PM
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Bike Year, Make, Engine: 2004 Ultima Chopper
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Very good video Stein, pretty much sums up the different sound from rich to lean...also nice explanation about the pressure at the intake from the incorrect air filter causing problems...people seem to over look that..Be nice to have the dyno sitting in the garage...

2004 Ultima 127 Chopper
1975 Harley Davidson Shovel head Chopper
Shreveport Louisiana

Last edited by Shovel52; 07-15-2017 at 06:50 PM..
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