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Old 06-21-2009, 09:13 PM   #1
NinjaZX9R
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Default Aftermarket Exhaust

Ive got a 03 Ninja ZX9 and it has a muzzy exhaust on it. it doesnt seem to have alot of torque. i cant even get the front wheel off the ground when i punch it. i have to let it bounce a few times before i can get it up. is this because of the exhuast?
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Old 06-21-2009, 09:48 PM   #2
newagetwotone
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No, leave it alone so it forces you to stop being a tool, now you cant act like an ******* and do wheelies on the road!
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Old 06-21-2009, 10:12 PM   #3
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No, leave it alone so it forces you to stop being a tool, now you cant act like an ******* and do wheelies on the road!


dude i dont drive like a tool. i drive good because of the exhaust cause i live in a smal town. and who says i do wheelies on the road?
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Old 06-21-2009, 10:23 PM   #4
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Sorry, you have to excuse NATT for assuming you didn't have dirt-tires on your ZX9 and rode it over hill and under dale.
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Old 06-21-2009, 10:27 PM   #5
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Yea sorry, i didn't see the high beak fender and knobbies on your Zx9... awesome, you put sad bags and a go faster stripe on that thing too?

Ok sorruy, i've been drinking heavly... no **** it, im drunk...
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Old 06-22-2009, 04:58 AM   #6
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To answer your question, no, it's not because of the exhaust.

Your bike, believe it or not, is NOT optimized to perform wheelies. It is optimized to accelerate hard and go around corners rapidly.

This means that the engine is positioned far forward to place a lot of weight on the front wheel for good steering, and to keep the bike from wheelying under hard acceleration.

Also, in order to get the highest power out of the engine, most of the power is produced at high engine speeds (RPM).

In order to get easier wheelies, gear your bike down by installing smaller countershaft sprocket, or larger rear wheel sprocket. This will give you higher engine speed (more power) at lower vehicle speed, and the front end will come right up.

Have fun, and please don't do this on public roads.
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Old 06-22-2009, 05:36 AM   #7
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"...i have to let it bounce a few times before i can get it up...."

Sounds like a personal problem. May I suggest Viagra???
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Old 06-22-2009, 12:21 PM   #8
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"...i have to let it bounce a few times before i can get it up...."

Sounds like a personal problem. May I suggest Viagra???

haha thanks for the tip.

thanks for answering my question pplassm. im really not that worried about it. i was just wondering.
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Old 06-22-2009, 03:44 PM   #9
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haha thanks for the tip.

thanks for answering my question pplassm. im really not that worried about it. i was just wondering.
Most aftermarket exhausts are tuned for max horsepower so they get nice dyno charts to display on their websites. You probably lost some low-end torque when the stock exhaust was removed. If you have a programmable ECU you might look for some maps that bump up the torque. You'll lose some top-end, but that only means you'll top out at 170mph instead of 180.
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Old 06-22-2009, 04:07 PM   #10
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Originally Posted by Kenneth_Moore View Post
Most aftermarket exhausts are tuned for max horsepower so they get nice dyno charts to display on their websites. You probably lost some low-end torque when the stock exhaust was removed. If you have a programmable ECU you might look for some maps that bump up the torque. You'll lose some top-end, but that only means you'll top out at 170mph instead of 180.

ya ive heard they make you lose a little torque but i wasnt sure. its a totally stock bike and i'm thinking i'll keep it that way for now. but ill keep that in mind
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