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Est-ce qu'il y a quelqu'un qui a un drz 400 sm avec une pipe complete yoshimura rs 2?J'aimerai savoir la grosseur de jet que je dois utiliser pour que le bike marche bien J'ai un filtreur kn&n et mon kit de jet est un dynojet.Merci a tous ceux qui m'aideront dans ma recherche.
 

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Carburetor & Airbox (For ridding from 0-4000ft above sea level)
The DRZ400S comes with a Mikuni BSR36 constant velocity carburetor. It comes with this carb for one reason and one reason only, because it can be tuned lean enough to be Environmental Protection Agency (EPA) standards. The only thing you should like about this carb is that it has the ability to adjust to changes in altitude better than the Keihin carbs.
First thing to do, regardless of what jetting/carb setup you choose, you need to open up the airbox so the engine can breath. Remove your airbox snorkel under your seat, and enlarge the airbox hole so it is a 3"x3" square hole, then use zip ties to secure your CDI (black box) in front of the airbox hole. When cutting the hole make sure not to cut too deep or you'll cut a hole in your rear fender! If you enlarge you airbox hole more air will be coming into your engine, causing it to run leaner. To compensate for the more air you will need to rejet with one of the options below to add more fuel. More air with the right amount of fuel equals more power! Do not open up your airbox hole if you do not plan on re-jetting.

Jetting Options
Purchase a DynoJet Stage One jetting kit. These kits are designed for an airbox that is not enlarged, so the main jets that they come with are not large enough. You need to modify the kit, and enlarge the airbox. For a stock, or a modified stock exhaust put in a 140 main jet. If you have an aftermarket exhaust use the stock 142.5 main jet. Then put in a 25 pilot (2.5 - 3 turns fuel screw) or the stock 22.5 pilot (3-3.5 turns fuel screw), you should be able to find both the main jet and the pilot jet locally. The main value of this kit is the needle and spring, they both work much better than stock. Put the needle on the 4th clip position. This kit cost about $60 and can be purchased many places.
The DRZ400S comes stock with a 142.5 main jet, 22.5 pilot fuel jet, change that to a 150 main jet, 27.5 pilot. The jets can be purchased from many motorcycle shops. This option will cost under $15. This jetting option is better than stock, but not even close to as good as jetting option one listed above. I highly recommend jetting option one.
 
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