Racer X Films: How to Service a Dirt Bike Throttle Tube

Have you ever wondered how a factory mechanic would do a number of bike maintenance tasks? Well, wonder no longer. We have teamed up with former factory mechanic Scott Adkins of Pro SX MX Tech to show you exactly how the professional teams in the pits of Monster Energy Supercross and Lucas Oil Pro Motocross go about taking care of their rides.
Scotty's got credentials, too; he's worked as a mechanic on both series for 12 years and wrenched with some top talent like Nick Wey, Ryan Sipes, Jeremy Martin, and Christophe Pourcel, to name a few. So sit back, relax, and in this installment you'll learn how to properly service your throttle tube. Check out the steps below.
Remove the dust cover.
Remove screws out of the housing, then remove housing.
Unhook the cables, then slide off the throttle tube.
Use contact cleaner to clean off the handlebar and cables.
Clean the inside of the throttle tube.
Clean out the throttle housing, make sure to get both halves.
Now it's time to reassemble.
Use a light grease on the bar itself and then small spray of WD-40.
Slide throttle tube back on.
Grease up the end of the tube where the cables run, and on the ends of the cables.
Reattach the cables.
Put the throttle housing back on. Make sure you have about an 1/8 of an inch of play at the end of the grip.
Reinstall the dust covers, and you're done!
ABOUT NAMURA TECHNOLOGIES
Pistons and Gaskets Coming from decades of Powersports aftermarket manufacturing, Namura continues to impress riders and dealers alike with their aggressive development and innovative product design and manufacturing in MX and ATV Pistons and Gaskets. Based out of the suburbs of Minneapolis, Minnesota, Namura is taking piston quality and durability to another level.
Visit Racer X Online: bit.ly/2VKTEp0
Subscribe to Racer X Magazine: bit.ly/2E45hlW
Follow us on Instagram: bit.ly/2X2F7Xc
Follow us on Facebook: bit.ly/2HvF6Wy
Follow us on Twitter: bit.ly/2JWWaWV
Subscribe to Racer X on KZbin: bit.ly/2HvhS2E

[@nyashnader1]

Bought a used Fz6. First bike, thought the throttle play was gritty. Cleaned, greased, lubed as per your video. The smoothness and consistent action my throttle has now is one of the most beautiful things I’ve experienced in my life. 🙌🏼

[@blaaaabla]

thanks bud! this worked for me and now my throttle is no longer sticky - it now returns as nice as yours

[@ernesto_yz125x]

Great video it helped me i was having problems on my crf 250r but did what u show and now its good thank you

[@philthebarbertv1134]

Great Vid. Super helpful. STEP BY STEP 💪🏽💪🏽💪🏽

[@MrEzplay]

Most helpful video on KZbin!👍

[@darrenkelly9638]

Great job. Your straight forward and professional.

[@gavenatwood8808]

This helped so much and saved me a ton of time and money

[@Tboss741]

Have a yz450f that had gritty throttle and followed your video step by step now it twist smooth even better than factory. Thanks!

[@jameshall7627]

Good video man 👍

[@karthikkaty2483]

Ur video got me outa trouble tonight

[@drakedeger5657]

Great vid, thanks

[@connersnow298]

Awesome vid and edits and filming and bike and shop

[@Battlenude]

i use a toothbrush to clean inside the throttle handle

[@lorenzoresendiz3898]

did it work good ? because i’m about to use a tooth brush

[@Battlenude]

@@lorenzoresendiz3898 ya. You can wrap a cleanWipe around it too. works even better

[@buddahmayne9273]

Cleaned mine this way to using rubbing alcohol

[@bryantucker1270]

I was just getting ready to say toothbrush works great

[@EthanAdey]

Thanks!

[@ELKYO93]

Cheers mate

[@enriqueaguayo4811]

I wouldn’t use grease. That’s what gums up everything anyway. Light oil on tube and lubed cable but no grease on the throttle cam

[@dill5500]

That dry oil stuff

[@roegenrosi-carney7580]

Thanks very helpful

[@TN_HondaDad]

I did this and it helped but after further troubleshooting the throttle cable was frayed and taped down below the number plate by the previous owner!

[@caseybrown7530]

When i took my bikes throttle apart a little white thing came out like a plastic white thing what is that

[@Bigdirtbikeguy]

Be nice to know what year make and model

[@FirstGendodgegarage]

I use my nans toothbrush to clean the handle

[@dcxplant]

Won't that grease/lube attract dirt and gum up the throttle tube and cable housing?

[@komicalkittens2460]

Can I do this even if I have hand guards on my bikr

[@chyerery9584]

Yes just use an allen or whatever bolt is used for the guard.

[@Jackson-yj5pb]

What type of grease

[@danielgardzina6982]

most dirtbike shops sell a tub of waterproof grease that is basically a lifetime supply for like $10. you can use it all the time for bolts you don't want to rust up, random things on your dirtbike or car, etc. the brand I have is maxima.

[@ItsAceItsAce]

@@danielgardzina6982 thanks

[@paulhetherington3854]

Racer = sanctioned id - well documented! You will be - indicted! X'= Our Oriental women!

[@chrisbilling]

Im trying to change the grips on mine and just realized the grip and the throttle tube is all one piece. What a great design 🤦‍♂️ gonna have to buy a new throttle tube

[@cruizebitler4968]

Lock on grips. Just took a set off my 450 r and it was not fun now having trouble with the new tube and grips.

[@salsandoval4069]

Throttle cable sticks from carburetor

[@lalique1980]

👍👍👍👍👍👍🎄👍👍👍👍👍

[@chrisbilling]

Good video tho

[@chrishitchcock9644]

Only thing wrong with video is namura… had two piston skirts break within an hour. One wiseco, no issue.

[@TAP-T0-HAVE-SX-WITH-ME_67]

y'all don't make fun of me but one of the cables on mine was a bit freyed and I couldn't get it in right so I just cut it off. the throttle works great now but I don't know what that other cable was for.

[@limargasim6661]

Great instructions my man! but too many "Itself" LOL

[@JoeWayne84]

Such bullshit they use Phillips screws still today like what the fuck give us a hex head or Allen key Philips or one time use fasteners they strip and cause a headache eventually

[@decentdiversions]

Odds are it isn’t actually Philips but JIS. Looks like Phillips but not the same. You won’t strip with a JIS screwdriver. But yea, Allen would be nice!

[@bradyn2193]

terrible

[@jasonb6570]

No u.