Question about 1992 Suzuki VS 800 Intruder

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I have a 2004 volusia with vance and hines exhaust but has not been jetted. will jetting increase or decrease my fuel mileage

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It all depends which way you need to go on the jetting for best performance. A richer mix will burn more gas and a leaner mix will burn less. Either way, you will not see a major difference in mpg.

Posted on Jun 25, 2009

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It could decrease it slightly since more fuel is going to the cylinders. It would be very little if any difference. Also, if the bike still runs fine after changing the pipes, rejetting is optional. Some pipes don't change exhaust flow enough to require rejetting. They say it adds power and throttle response, but from years of experience, I have only noticed a difference on a few bikes.

Posted on Jun 25, 2009

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1 Answer

I bought a 1983 gs1100e i have put a vance and hines 4 into 1 exhaust and installed uni air filters need to know whats the best jets to upgrade to


Check into a set of stage 3 jets, you will need to take the bike to a bike shop to have them put in as well as have the carbs resinked afterwards.

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Low rpm loss of power with aftermarket vance and hines pipes


If you have carburetors you need to install a jet kit. If you have a fuel injected bike you need to add a Power Commander and program it for the changes you have made to the intake side of the engine. Make sure you installed all new exhaust gaskets or you will have lots of popping and back firing.

Jan 31, 2011 | 1996 Honda VT 1100 C2 Shadow Sabre

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I have a 2000 Honda VT1100 Sabre Shadow. It's got aftermarket Vance and Hines pipes. It continues to have a backfire when moving up through the gears. I've had the jets (and K&N filter and plugs)...


When you installed the Vance and Hines pipes did you use new gaskets? Popping and backfiring is often caused by leaking copper o-rings in the head to head pipe connection , or head pipe to muffler gasket. Sealing the system will prevent oxygen igniting the unburned fuel in the exhaust pipe. Hopefully , this is all you need to stop the popping.

Nov 13, 2010 | Honda VT 1100 C Shadow Motorcycles

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I need to know if i have to re jet my 98 yamaha 650 v star if i put on the vance and hines cruzer exhaust just the exhaust nothing else. and also what type and size of jets to use


You can try driving the bike after the install. After you change the exhaust it will run lean. You may want to coat the inside of the mufflers with an anti blu-ing agent or your headers will discolor. If when test driving you notice the bike has developed a flat spot in the acceleration curve you will want to re-jet the carburetors. The easiest way is to buy a jet kit from Cobra, Dyna-jet,etc.($80-$100). Other wise you can just buy several sets of larger jets and change them out till you are happy with the way it runs. Most people that change the mufflers and put in a jet kit, also install a K&N air filter .
More air flow + fuel flow = more exhaust flow (more power)

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Jet kit,vance n hines,k@n, ran well for 500 mi now runs rough at low rpm and backfires some when downshifting.i put new plugs and fuel filter on it.bike has 5000 mi on it


Jets could be the wrong size, could be the gas, or could still be the plugs. The backfiring is from too much fuel getting into the exhaust and igniting. Running rough at low rpm's is usually a sign of too much fuel as well. I would try adjusting the idle control to see if it doesn't help regulate the fuel to the jets.

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Mikuni jetting


If it's the Sreamin' Eagle Mikuni, it should come jetted close enough to take your bike to someone with an exhaust gas analyzer. That's the best way to get your card jetted correctly with the extensive amount of changes that you have made on this bike. I would advise that you take the bike to someone that has a dynometer that is equipped with an EGA and have the run the bike up. I would not want the mixture to exceed 14:1 at any time and preferrably run about 13.5:1. It's a bit on the rich side but it will help keep your engine running cooler. I've installed the carbs before but I cannot remember what jets they had in them. Sorry. Good Luck.

Jan 21, 2010 | 2003 Harley Davidson FLSTF Fat boy

3 Answers

Backfire and popping after installing vance & hines longshots


Let me know via baxr09@yahoo.com.au if you get a solution, Mine is doing similar but mine is holding back at half throttle to, Wont rev high at all just chokes under load

Apr 17, 2009 | 1999 Honda VT 1100 C3 Shadow Aero

1 Answer

Engine dosent stay on


not nessesarily.
changing the exhaust system usually requires rejetting the carb.
a different exhaust pipe will give/make the exhaust back pressure change. you should of gotten a paper with instructions saying something about changing the jetting.

Feb 22, 2009 | 2001 Honda VT 750 DC Black Widow

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