straight pipes on my vn900 custom - Kawasaki Vulcan Forum : Vulcan Forums
 
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post #1 of 5 (permalink) Old 02-24-2011, 03:40 PM Thread Starter
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straight pipes on my vn900 custom

I'm told I need some sort of fuel modifier or something like that if I put straights on my bike. It had something to do with loss in compression or whatever.

what's that thing called? or was the guy full of shit and I don't really need anything?
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post #2 of 5 (permalink) Old 02-24-2011, 03:47 PM Thread Starter
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btw, these are the pipes I want... http://meancycles.com/store/parts/vi...?partID=216326
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post #3 of 5 (permalink) Old 02-24-2011, 04:57 PM
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You shouldn't need a fuel processor unless you change the air breather, my brother just order drag pipes for his 1200 sportster and he was told he would lose compession so he also ordered compression cones that slide into his header exhaust before he bolts them on. but i dont know if thier available for the application you are doing. personally i think you'll be ok...good luck
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post #4 of 5 (permalink) Old 02-25-2011, 12:54 AM
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Originally Posted by diehard rider View Post
so he also ordered compression cones that slide into his header exhaust before he bolts them on.
Maybe compression cones for his ears

http://www.homedepot.ca/webapp/wcs/s...k=P_PartNumber

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post #5 of 5 (permalink) Old 02-25-2011, 02:03 AM
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Originally Posted by hue-e View Post
I'm told I need some sort of fuel modifier or something like that if I put straights on my bike. It had something to do with loss in compression or whatever.

what's that thing called? or was the guy full of shit and I don't really need anything?
If you think the bike manufacturers program the ECU for performance, you're wrong. They do what they do in order to pass emissions standards for the various countries they market their bikes in. A detuned engine runs cleaner and I'm not talking soot out the pipes.
Straight pipes make noise while a tuned exhaust unleashes hp. Add a free flow air cleaner and there will be an imbalance that the ECU cannot adjust and the engine will have flat spots and quite possibly loose hp, not gain. An after market fuel management system can provide the means to adjust the air/fuel ratio for better performance and/or economy. They all work hand-in-hand.
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