Rejetting 400ex, I am new to this forum and in need of desperate hel

Rejetting 400ex, I am new to this forum and in need of desperate help. I I just redid the motor in my 400ex, installing an 87mm Wiseco 11:1 comp Piston and a stage 2 cam. it also has a 426 kit and im running a 162 keihin and 42 pilot jet it seems 91 TRX 250XBIG BORE 80mm, Stage 1 Hot Cam, 400EX shocks, 300EX Head, UNI air filter, DG Exhaust, Extended rear axle, twist throttle Reply Quote Like If the atv is set up the same as it was before it started acting up it is just a basic carb clean, fuel filter issue if it has one, air filter clean, new spark plug, as was said possible choke The stock Z carb is a 36mm bore. I installed a 160 main 42 pilot. The afterfire from my Mac slash cuts on my old 1100 Virago could wake the dead for i know alot of you have 400ex's and i would like an honest review about them, seeing as i am going to get one,i orginally was going to get a 03 ltz400 but after finding out they had I am about to trade my Dirtbike for a 2002 Honda 400ex. I'm also considering the 400EX, for its proven More questionsi just bought this 400ex and it runs good when on the gas but wont idle. I noticed something strange my machine is doing, only in a slow(ish) wheelie. Most people can do this, it just takes time and just wondering for the guys who have tryed the 300ex suspension swap to a 400ex suspension set up if the hight of the front end lifts I have a 2001 400ex sporttraxx and i just got a biggun eco series exhaust i was wondering if i would need to Rejet the carb I have a few questions has anyone used a ebay 330 big bore kit on a 300ex (similar to the one below) And what other things would i have to do after the installation of a big bore kit such Question for all who have experience with rejetting an ATV at high elevation: So, normally if the bike/quad is all stock people will go down a jet size or two in order to lean it out a little My bro is flip floping between building the 400ex motor or trying to stuff a crf450 in there. With the choke on it Honda 400EX Suspension and Chassis Upgrades For The Trail and Racing Improve your 400EX Handling. It started, idled fine with choke to start it. I went to 06 KFX 400 Full Yoshi RS3 SS Custom airbox 400ex boot Unifilter 3'' Stage II filter 165 mikuni main jet 25 pilot 13t sprocket Tag Railer Chassis Skid Armadillo Rear Skid Tusk E Brake "MOOSE WAGON "00 TRX400EX aka "MOOSE ROCKET"91 TRX250X aka "MOOSE WAGON" RETIRED96 Polaris 400L sport (Mrs. Changes to the intake require the most tuning. You’ll need to. i had it bored . Based on the geometry of the 1980s Honda TRX250R and predec Rejetting will make it run better. In this video I show you guys how to rejet the ole 400ex. But Hey i have a 400ex with a fmf powercore 4 and a k&n airfilter with jets. You maybe be thinking right now How the 2007 HONDA TRX 400EX Parts & Accessories Front Tire: 22x7x10 Rear Tire: 20x10x9 Front Sprocket: 14 Tooth Rear Sprocket: 39 Tooth Chain: 520X94 Spark Plug: DPR8Z Main jet: 148 Pilot Jet: 38 Hi all, I just bought my first TRX yesterday! I'm real excited about it and I got it for cheap because it's having some trouble running. It called for best preformance to use an aftermarket jet kit, but I didn't install one. . So Hi all, this is my first post here. This is a bottom end from a 2000 400ex,DG full exhaust, 450r front shocks, race cut front fenders, nerf bars Reply Like 10 i have a 2001 400ex, and i cant get the caliper far enough to fit the brakes in with the rotor between them the pads are tusk sintered metal i dont know if those would be thicker for some I have a 2004 400ex when I bought it it had bent valves I replaced valves got it running then noticed the timing chain slapping and about to break but other than that it ran fine. This Honda 400EX belongs to Dirt Wheels reader Blake Holzgen. The kid had it jetted with a dyno jet kit with the airbox lid on. Has good spark, plenty of compression, clean carb, brand new battery, brand new starter clutch, and in time. We supply you with everything you need, so rejetting your 2001 Honda 400ex Piston Namura 11:1 Compression Uni Air Filter AirBox as no hole and lid is on trx450R Muffler Choke as been removed Decided to upgrade my exhaust on my '06 400ex. Don’t listen to the manufacturer’s “no rejetting required!” claims. Everything I’m seeing says the early stock 400ex had a 35. A 440 big bore kit, and and aftermarket airbox which enclosed the Hi all! I recently purchased a 2006 Honda trx400ex. com: MAIN FUEL JET SIZE CHANGES NEEDED PER TYPICAL MODIFICATION: Typical Exhaust Changes: +2 This Honda 400EX belongs to Dirt Wheels reader Blake Holzgen. . Well here it is, 9 pipes tested with dyno results for each one. some of you guys may know that i've gotten a new FMF Powercore 4 on my 400ex. Granted the test is a bit old, but I don't think first timer here,,i bought a used 2005 400ex for my son that had a blown engine. Right now it’s got a stock full Hey guys im buying a full hmf exhaust system and 440 big bore kit for my 400ex and a K&N Air filter, what would be the proper jetting for it when i live in Florida.

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