A Must-Do Mod for the DRZ400 (Carb Rejet)

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[@yammienoob]

I'm tempted to take the DRZ out for some wheelie practice now before I give it away... jk. Seriously though, time's running out to get entered to win the DRZ so head over to

[@ronniefnd]

Love me some DRZ400. I bought mine brand new in 02 and have 110,000 miles on it still going strong

[@hdrenginedevelopment7507]

Popping on decel, hesitation and easy stalling just off idle just getting moving is probably too lean on the slow jet/pilot jet. Slide needle diameter controls mixture in lower part throttle once you get moving (transition off of the pilot circuit), needle clip position controls primarily mixture at higher part throttle but also affects balance of mixture between lower and higher part throttle (so drastic changes in needle position may require a change in needle size to recalibrate the lower throttle mixture...my CR specials have 7 clip positions), needle taper change if available affects primarily mixture balance between lower and higher part throttle without changing the low throttle mixture, and the main jet somewhat affects high part throttle but progressively mostly full throttle. Riding on cold versus warm days will help you feel what parts need changing, as areas of the throttle range too rich will improve when it gets colder out and areas that are too lean will improve when it gets warmer out. In a perfect world, you create a consistent calibration that gets lean or rich equally with weather changes and then just have a set of winter jets/needles/settings and summer jets/needles/settings if you ride all seasons. It can be tricky to read plugs, because if your calibration spans both rich and lean, the different operating realms can clean or soot up the plugs and your readings will only reflect what was most recently run, so a rich top end followed by a bunch of lean cruise on your way home to check plugs in the garage will probably show lean. Best way to read the main jet is to find a deserted stretch to rip a good full throttle pull and then kill the engine right away and read the plugs right on the spot. Then just repeat for the tip, mid, and base of the slide needle. It's probably easier with a direct controlled slide versus CV carbs, but that's the general idea.

[@mattnye8313]

I love how honest this guy is so it doesnt make me feel like shit when i mess up too 😂

[@bbs5400]

Imagine living somewhere so warm you feel obligated to explain why you’re wearing a skimpy little jacket 😑 so jealous

[@rolanamatus3411]

hi good day yammie noob i'm one of your fan here in the Philippines. thank you for those videos even though i dont have bigbike i still learned the the different specs of it and i'm looking forward to have one someday especially the honda cb650r.. good luck to your next videos.

[@ericdoswell8115]

A Haynes manual is the best $20 you can spend on a vehicle.

[@svensharpsword9837]

I like when Spite gets to do his own episodes, he's no papa but it is cool to see him get more comfortable with talking as time goes on!

[@benson4u215]

Im at 3200+ feet altitude and a dj132 main is too lean for my dr200s even, I have the dj142 installed with the clip on the third notch as suggested, doubled up on the vacuum spring for fun, drilled out the 2 vacuum ports at the end of the slide for a smoother venturi on lift-off, took the lid fully off my airbox and drilled through a few of the stock baffles but kept the fire arrestor, cant plug the carbs overflow tube like they say or the vacuum gets messed up and will suck the bowl dry. My dr header glowed a couple times like a turbo on antilag till I figured that one out and the bike flys with almost zero adjustments needed year to year since I got it dialed in, 5-85mph steady cool combustion temps :) I did have to "resize" the pilot with a suitable size drill bit to get rid of the lean pops, ive got my 2015 right at the edge of a stage 2 even with a stock pipe opened up and itll lift the front tire even with oversized tires

[@2wheelTaylor]

Could used this video earlier 😂 I stripped my float bowl screws and it took FOREVER to get it apart.

[@shaniebaby333]

Just did the jet kit, 3x3 mod today with a new yoshi full exhaust system! Getting a little bit of back fire as the revs come down while slowing down... time to pull the carb back off 😤

[@ajaxracing]

My experience with this kit is factory settings are way to lean (located in socal)recommend a wideband o2 or dyno tune

[@oldschoolbugs]

Need to drill out the factory plug so you can adjust the air screw.

[@PsychoGirlMagnet1216]

Once again, awesome vid. I’ve never been able to tell if you are calling this boss man, “Spike”or”Spite”... so, “”Spork” it is. Great tech vid!

[@sampatton548]

Also, if you have inconsistent idle, your fuel screw on the bottom of the carb probobly needs dialed in, or you pilot jet needs one step up or down.

[@paulhorvath9784]

I put an M4 full system and Quick shot 2 on carbie..Big Improvement.. Mind you I spent $10 000 Au dollars on Wheels ,suspension. Removing all electrical parts and conversion to kick start, anodised triple clamps to match anodised hubs..Stabilizer,,,Custom bash plate ,lowering linkages, and changed front sprocket among few other things that made it the Most externally customised 2010 Black Drz400e in Australia that was featured in US magazine. ..lost app 40 lb off the original weight..

[@Indio7]

“Carbureted it does not know how to adjust its fuel mixture” 😂😂😂 so funny that you have to explain that....

[@MrSlizz-wz5nb]

I did the jet kit mod it Idles but when i let the clutch out and give it gas it dies. is there something that has to be done with the idle adjustment???

[@DoomStarRequiem]

Yammie now: imma rejet the drz's carb.

[@seanwhitfield9223]

Look up Vessel JIS screwdrivers on Amazon. I swear by them with my Kawasaki Vulcan