Question about 2007 Yamaha V Star Classic

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I want to pull the baffles out of the muflers and wondering if i have to jet kit the bike so i dont damage the moter

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Yes it will require rejetting.
It might only need the air mixture adjusted, and needles raised, but could also need mains

It also will make the bike loud which authorities and neighbours hate

Posted on Mar 23, 2011


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Hesitates and backfires

hi the air box and exhaust restrict the air movement through the cyclinders to match the jets in the carbs. i have bikes that you can remove baffles or airbox with no problem, others are so finely tunes that it is impossible to run the bike without the restriction. the easy option would be to get a jet and air filter kit. then if you need to restrict air flow any (hopefully you wont need to) you could very slightly raise the inlet/outlet valve gaps to the maximum amount which will open the valves for a slightly shorter time. you could also restrict the exhaust by using large washers on the exhaust gaskets. similar to those used to restrict a bike.

Mar 07, 2013 | Motorcycles

1 Answer

1982 honda CB900C carbs re-jetted and straight pipes with volkswagon baffles for backpressure won't idle ect..

hiya sounds like your float in the leaking carb is sticking. this will cause the problems you have. check and clean float system in carb, check for leaking float too.

Mar 06, 2013 | Motorcycles

2 Answers

I have recently put a jet kit in my 1999 kawasaki zx6E! It seems that when i get it at a really high RPM in 3rd, 4th, 5th and 6th gear, it spits and sputters like its starving for fuel. I was wondering if...

Your not reaching the RPM level for your rev limiter are you? The rev limiter will automatically shut fire off intermittently to keep the motor from damage at high RPM's. I have to admitt I am not up to par an all these newer bikes, but if you jetted the carbs, then I doubt you have a fuel pump on the bike. Most bikes with fuel pumps use fuel injection! Call the dealer who sold you the jets and ask them what else needs to be done, I am sure they will be glad to help.

Nov 16, 2010 | 1999 kawasaki ZZR 600

1 Answer

Bought bike had open pipes, old owner never had bike adjusted, added baffles for back pressure, runs 85% better, was wondering if it was possible to adjust carbs rather than rejetting?

In order for your motorcycle to run correctly you will have to put in larger main jets. Most jet kits also come with a set of needles that have a different taper from the stock needles. If you want the power band of your motorcycle to accelerate smoothly and get rid of the flat spot/hesitation when you apply throttle , you should spend the $100 and put in a jet kit.

Oct 15, 2010 | 2004 Honda VT 1100 C2 Shadow Sabre

1 Answer

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

2 Answers

Whether or not to remove the baffles on my kawasaki nomad

Probably not.

As you know or should be aware, everything on a motorcycle is there for a reason and a purpose. All parts complement all other parts. The muffler has these parts inside so your riding will not be annoying to others as well as to provide proper pressure and back pressure for the proper operation of your engine.

The best rule of thumb to follow for modifying your motorcycle's engineering is dont.

Probably not what you wanted to hear. I have been riding for just over 37 years and have followed my own advice and had pretty good results.

Thanks for visiting

Dec 13, 2009 | 2002 kawasaki VN 1500 Vulcan Classic...

1 Answer

Removing baffles

When removing such things or even changing exaust system, make sure carb jets are reset. Or if your bike is fuel injected to have it reprogramed.By changing exaust flow you change intake flow.

Jul 21, 2009 | 2001 Triumph TT 600

2 Answers

Engine skipping & popping

sounds like a lean out condition... pull plugs and look at them if there white and sooty its to lean.... jet it up or replace baffles..i think your on the right track with backpressure theory!

Nov 20, 2008 | 1998 Suzuki RG 150 Gamma II

1 Answer


just make sure you rejet the carb all bikes come from the factory on the lean side to meet epa standards etc. if you dont rejet you'll actually lose some power and have nasty backfires as well take the time to put a jet kit in i personally recommend dynojet easy to install and comes with suggestions for your application

Jul 21, 2008 | Harley Davidson Harley-Davidson Motorcycle...

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