Pipes - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
 
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post #1 of 10 (permalink) Old 09-23-2008, 11:46 AM Thread Starter
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Pipes

I just had the Speedstar Staggered Long Drag Exhaust installed on my Raider. They sound great but the popping is driving me crazy...I went back to the dealer and he said, "That the pipes pop a little." Can this be true? I know the bike is new and he maybe unfamiliar with the bikes tuning. I also installed a DYNO power commander to see if this would help however its still the same.
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post #2 of 10 (permalink) Old 10-25-2008, 06:26 AM
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Have it put on a Dynamometer [dyno] and adjusted accordingly... Poping...unacceptable....Ride hard..fast..Stay..safe.......
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post #3 of 10 (permalink) Old 12-19-2008, 05:30 AM
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Adjust your dynamometer make it accurate... to make it ride safely...


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post #4 of 10 (permalink) Old 04-03-2009, 12:20 PM
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I Have The Same Problem With My Roadliner, I Put Dynojet, Kn Airfilter, 2-1 Sideburner Pipes. Poping Drives Me Nuts Also. I Was Told Thats The Price For Performance. I Do'nt Bielive It. Going To Look At Other Options. Let Me Know If You Have Any Luck.. I Think Its Somthing In The Engine.
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post #5 of 10 (permalink) Old 04-21-2009, 11:48 PM
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what pipes did you put on your Roadliner? i'm looking at the Cobra Power Pro HP 2 into 1 Exhaust for my 950 and it would be good to know if the popping is because of the particular pipes or some new design on Yamaha's V twin engine.

is there any way to know how much louder over stock a particular exhaust system will be before actually buying it and installing it?
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post #6 of 10 (permalink) Old 05-01-2009, 03:27 PM
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Quote:
Originally Posted by bluemb375 View Post
I Have The Same Problem With My Roadliner, I Put Dynojet, Kn Airfilter, 2-1 Sideburner Pipes. Poping Drives Me Nuts Also. I Was Told Thats The Price For Performance. I Do'nt Bielive It. Going To Look At Other Options. Let Me Know If You Have Any Luck.. I Think Its Somthing In The Engine.
If you're popping when you back off the throttle after changing out the air filter and exhaust for a less restrictive ones, the problem is usually unburned fuel dumping into the hot exhausts and detonating. When you intake and exhaust restrictions, you alter the back pressure which changes the fluid dynamics associated with the exhausts valves which allows more fuel air mix to get in. By also changing out the air filter to a less restrictive one, you've eliminated part of the fuel limiting mechanism which means more fuel to detonate. The fix for the changes in the flow dynamics is changing the timing but that will reduce performance unless you design a custom cam shaft but then it isn't the same engine.

If you want loud, you can get loud without altering the exhaust back pressure or upsetting the fuel/air/flow mix rate with a less restrictive filter. If you are trying to increase power, then you have some ugly trade offs.
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post #7 of 10 (permalink) Old 05-15-2009, 06:24 AM
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Pasquale, does the Raider have an AIS or Air Injection System on the motor? The RoadStars have them and usually have to be removed when either installing aftermarket pipes or modifying the stock exhaust for the popping you describe.. The AIS puts air into the exhaust to help burn off any unburnt fuel to clean up emissions. The Raider is Fuel injected so it may not have such a system, I don't know.
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post #8 of 10 (permalink) Old 05-28-2009, 10:44 AM
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You will have some excess noise, just like headers on a car or truck. I also have a Victory Jackpot, and there is a constant discussion and guys complaining of the "Pop", with the "non-stock" pipes.
Like whetstone said if your looking for extra performance you have to make some sacrifices.
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post #9 of 10 (permalink) Old 05-28-2009, 04:12 PM
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thanks guys, not sure what i'm going to do.... thanks for the info.
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post #10 of 10 (permalink) Old 07-22-2010, 09:44 PM
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Do you know for sure that new gaskets were installed where the pipes bolt to the heads? Not all pipes come with new gaskets and sometimes people will try to reuse the old gaskets and if they aren't sealing it can cause the popping you're talking about. This can happen with new gaskets too if they aren't installed properly. I've got an '04 V-Star 1100 with Bub's pipes and I tried reusing the gaskets when I bolted the pipes back on after removing them to change the oil filter and ended up with a leak at the front pipe and the popping was terrible. Put new gaskets in, no more popping.
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