Is there an aftermarket exhaust....

bob706 · November 12th, 2009, 06:51 AM

....that requires no shimming or jetting? I'm thinking of changing the exhaust just for cosmetic reasons. I like the way my bike runs and the mpg I get so I really don't want to monkey with washers and tuning. I was thinking about a s/o can I seen on ebay but they don't say whether shimming is necessary or not.

tapdiggy · November 12th, 2009, 08:56 AM

The concensus I have gathered from others is that most slip-ons won't alter your aspiration enough to need a rejet.

M-Oorb · November 12th, 2009, 11:05 AM

I can't say from experience but I would say to get your bike running smoothly you may. Each of our bikes is different and the conditions (elevation,temp,ect) are all different. That being said, these bikes come pretty lean from the factory as is. Adding a slip on removes back pressure, even if its just a little bit, which will lean the bike out a bit further. If your bike runs perfect and smoothly now without shimming then a slip on shouldn't make a big difference. But if the bike isn't as smooth as you would like but have lived with it because its not that bad, adding a slip on may enhance this issue.

Just my 2 pennies
Posted via Mobile Device

HKr1 · November 12th, 2009, 11:07 AM

You should toss the DJ needle in your bike either way. I have a modded slip-on in the attic, if you wanna try it and see........ your more than welcome

bob706 · November 12th, 2009, 12:59 PM

Thanks Kerry. I may take you up on the offer. Gonna do a little more research online and see exactly what's out there.

k-os · November 12th, 2009, 01:04 PM

I believe most of the aftermarket exhausts out are less restrictive than the stock exhaust (therefore running leaner) and the bikes from factory are already on the leaner side so shimming is usually a good idea.

beqwarrior · May 29th, 2011, 09:32 AM

Quote:

Originally Posted by HKr1

You should toss the DJ needle in your bike either way. I have a modded slip-on in the attic, if you wanna try it and see........ your more than welcome

Kerry, Do you still have that slip on in your attic by chance?

November 12th, 2009, 06:51 AM	#1
bob706 ninjette.org certified postwhore Name: Sean Location: Mary Esther, FL Join Date: Jan 2009 Motorcycle(s): 2008 Ninja 250 1998 HD Road King Posts: A lot.	Is there an aftermarket exhaust.... ....that requires no shimming or jetting? I'm thinking of changing the exhaust just for cosmetic reasons. I like the way my bike runs and the mpg I get so I really don't want to monkey with washers and tuning. I was thinking about a s/o can I seen on ebay but they don't say whether shimming is necessary or not.

November 12th, 2009, 08:56 AM	#2
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	The concensus I have gathered from others is that most slip-ons won't alter your aspiration enough to need a rejet. __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

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November 12th, 2009, 11:05 AM	#3
M-Oorb ninjette.org sage Name: Matt Location: South East Florida/Rutgers University Join Date: Dec 2008 Motorcycle(s): 2008 250r (Fastest Color) Posts: 914	I can't say from experience but I would say to get your bike running smoothly you may. Each of our bikes is different and the conditions (elevation,temp,ect) are all different. That being said, these bikes come pretty lean from the factory as is. Adding a slip on removes back pressure, even if its just a little bit, which will lean the bike out a bit further. If your bike runs perfect and smoothly now without shimming then a slip on shouldn't make a big difference. But if the bike isn't as smooth as you would like but have lived with it because its not that bad, adding a slip on may enhance this issue. Just my 2 pennies Posted via Mobile Device

November 12th, 2009, 11:07 AM	#4
HKr1 IC2(SW) Name: Kerry Location: Pensacola Join Date: Nov 2008 Motorcycle(s): . Posts: A lot.	You should toss the DJ needle in your bike either way. I have a modded slip-on in the attic, if you wanna try it and see........ your more than welcome

November 12th, 2009, 12:59 PM	#5
bob706 ninjette.org certified postwhore Name: Sean Location: Mary Esther, FL Join Date: Jan 2009 Motorcycle(s): 2008 Ninja 250 1998 HD Road King Posts: A lot.	Thanks Kerry. I may take you up on the offer. Gonna do a little more research online and see exactly what's out there.

November 12th, 2009, 01:04 PM	#6
k-os ninjette.org sage Name: Andy Location: Sheboygan, WI Join Date: Dec 2008 Motorcycle(s): 1988 Honda Hawk NT650, 1989 Honda Hawk NT650, 1997 GSXR750 Track Bike Posts: 890	I believe most of the aftermarket exhausts out are less restrictive than the stock exhaust (therefore running leaner) and the bikes from factory are already on the leaner side so shimming is usually a good idea.