Question about 2006 Husaberg FE 450 e

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I just put on an R and D powerbowl and i have a problem

Every time i snap the accelorater on it has a big flat spot i changed the main jet from a 178 to a 180 i havent adjusted anything else except the mixture it idles fine and drives fine

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  • Anonymous May 21, 2009

    what is the theory behind doing this

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Remove the slide and then move the jet needle clip one notch lower. Try two notches if one doesn't do it.

Please rate this solution. Thanks Robbutterfie!

Posted on Apr 16, 2009

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1 Answer

How to tell which needle and seat go to which carb, factory stock?


Manual says - VT 1100 88-96 main Jet both nr.165, slow Jet 42

For VT C2 and 1100T main front 175, rear 180 , slow 42

For 97 main both 178 , slow 42

You can read Nr. on Jets, they are small

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I just bought a 2000 Honda Shadow Sabre 1100. It appears to be "running rich" and friends have said I should adjust the throttle/idle. How do I do this??? Thanks


To adjust your idle speed there is a single screw (usually with a black plastic knob ) that hangs down between the two carburetors. Turning the knob will raise or lower the idle speed. Clockwise will raise the idle. Counter clockwise will lower the idle. Changing the idle speed will not lean or richen the mixture. To change the mixture you will have to rejet the carburetors. I assume the carburetors have been rejetted to compensate for an after market exhaust system. In which case the carburetors are set too rich (too big of a main jet size) to compensate for a bad flat spot in the acceleration. If this is the case, take out the main jets and replace them with the next smaller size. If the machine is stock then check your air cleaner. If it is restricted/dirty, then the extra vacuum caused by the dirty air filter is causing the rich mixture. Try changing the air filter or in stall a high flow air filter like a K&N. This will put the mixture back to normal.

Jun 15, 2011 | 2001 Honda VT 1100 C2 Shadow Sabre

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I took the stock air filter off my 2000 Suzuki Katana 600 and put a K&N air filter in it, when i accelerate it stalls out a bit before kicking up to speed. a slight lag then go.


Changing to a K&N air filter changes the air/fuel mixture for your bike, and you're probably hitting an overly lean spot before things start to even out. For bikes still running carburetors, which I think you have, you can compensate for this by changing to a slightly larger idle jet. Your main jet is probably fine (it's kicking in after the lag); it's the crossover from idle to main jet that's causing the flat spot.
Talk to your dealership parts counter to get recommendations about jet settings. They may suggest, for example, to keep your existing idle jet and go with a different main jet. Expect to try a couple different setups to find one that works best for your bike and your riding style. I would highly recommend keeping your original jets, though, in case you ever go back to the stock air box.

May 09, 2011 | 2000 Suzuki GSX 600 F (Katana)

1 Answer

Put a big gun evo r pipe on crf 150f,changed pilot jet from 40 to 42 and main jet to a 115 from 98 .took snorkel out of airbox have a big bog when you crack the throttle open,if you leave the choke up a...


I think you went the wrong direction when you changed the main jet. Put the 115 jet back in, then work up from there. When you get it right, the spark plug inner insulator should be a light tan color. Black is too much fuel, and white with blisters is too lean. Good luck!

Jan 10, 2011 | 2005 Honda CRF 150 F

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I just rejetted ( at least I think I did ) my carburetor on my vstar 1100 custom. The problem is that the Cobra Carb Jet Kit 92-2170 only had main jets.... five of them. Does this mean that only the main...


In many case when you rejet your carburetors you are only changing the mains and the needles(to get rid of the acceleration bog) If they give you several size jets to try, be sure you are putting the right sizes in the right spots. Yamaha typically will run one carburetor leaner than the other. Depending on how the cycle is running , I have known people to match the jets in both carburetors. Check the color of your plugs to double check if you have set the cycle up correctly.

Oct 10, 2010 | 1999 Yamaha V Star 1100 Custom

1 Answer

I have a stock 1989 600xr. I have noticed tha it has a flat spot in the carberation from off idle to full throttle. If I put the choke on this goes away. Temp is around 80 and alltitude is 4000 feet. I...


They often had a flat spot from new, once the restricters were removed.
and there was a performance jet kit at the time.
Stock would mean it has a very restrictive end cap in the muffler, it may not still be there after 20 years, most were removed in the first few days.

you could try raising the needle a notch or two, then maybe a larger main jet.

Make sure it has a good air cleaner first.
Take notes about changes made and improvements.
adjust one thing at a time
dyno jet will have a kit I imagine.

Jun 27, 2010 | 1989 Honda XR 600 R

1 Answer

Rf has race can K&N and dyno jet fitted when i got it, but terrible flat spots all over the place. can you give me a clue what size of main jet to use


No one can tell you what jet size to use unless they know exactly what exhaust and jets you have now. The best thing for you to do is go back to a known good configuration. If it has never run right since you had it, go back to stock (make sure it runs right with stock settings now!) and start your adjustments from there. Change one thing at a time and do performance testing between each change. Dyno runs are best, but timed runs might work too, depending on your application.

Jun 30, 2009 | 1994 Suzuki RF 600 R

1 Answer

I want to know the theory behind changing the needle clip setting 1 or 2 to take out flat spot when i snap the accelorator on since i have put power bowl on and changed the main jet from 178 to 180.


The most important thing is to read your spark plug. As long as the insulator surrounding the electrode is completely golden brown then you are doing things right. The plug will tell you how the engine is running at different RPMS. Closest to the insulator is at idle and the further you look down the insulator, the higher the RPM. When you raise or lower the needle you change the fuel mixture and if the plug is black then you are feeding too much fuel in. If the plug is white or grey then you are too lean and on the verg of melting engine parts. Any modification is OK as long as you have the proper air fuel mixture and have the proper back pressure. It only takes a few seconds at full throttle to melt your engine so do research before doing any modification.

May 22, 2009 | 2006 Husaberg FE 450 e

1 Answer

It cuts out at high rpm but the plug is fine.


Pull the spark plug. If the porcelain cone is whitish then change the main jet to a higher number i.e.. 178 original main jet changes to a 180 or a 182 if needed.

If the porcelain cone is blackish or sooty then change to a lower number i. e. 178 down to a 175 or 172.

Apr 22, 2009 | 1977 kawasaki KE 125

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