Got my first Yamaha. Are fuel screws different from Hondas?

4 replies to this topic
  • Stupendous

Posted December 04, 2006 - 11:51 AM


I used to have a '05 CRF 250X. I had pulled the carburetor a couple of times so I was familiar with it. I knew where the fuel screw was and had replaced it. The stock fuel screw was also visible when just looking at the bike.

I just picked up a '07 YZ450F. I went to the track yesterday to start breaking it in. I had to make a very minor adjustment to the idle (I hadn't started riding at the track yet). While doing so I noticed the lack of a fuel screw. I could not see it. Is it supposed to be visible? I see the hole where it came out on my 250X.

Now what I'm wondering is are Yamaha's different? Both carburetors are Keinin so I imagine design is the same. Or did my fuel screw already fall out? I had never touched it and prior to arriving to the track I putted around for less than 1 mile. But what is weird is my bike ran fine yesterday so that's why I'm confused about it falling out.


  • never59

Posted December 04, 2006 - 12:59 PM


You can not see the fuel screw if jou are just kneeling down looking at the side of the carb. You can see the hole where the fuel screw is but not the fuel screw Your best bet is to buy an aftermarket fuel screw. Just take the existing spring, brass washer and o-ring and put it on the after market fuel screw and screw it back in. If your bike is running good,screw the existing fuel screw all the way in and count how far it's out so when you put the new one in you know exactly how many turns it needs to be out. I bought my fuel screw at rockmountainatvmc and it was $20.00. You can also buy them here at the TT store

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • 02YZ426

Posted December 04, 2006 - 02:39 PM


I think the fuel screws are the same. I have one from a Honda in my 06YZ450 right now.

  • Stupendous

Posted December 04, 2006 - 03:57 PM


Well I just meant in terms of visibility from looking on the side of the bike.

  • Drfletcherdc

Posted December 05, 2006 - 10:32 AM


No you won't be able to see it, just the hole on the bottom of the carb in front.

Related Content


Chubby dad, looking at bikes , First trip to the orange/black forum ! by Slow_ride

Dirt Bike   Make / Model Specific   KTM   250-530 EXC/MXC/SXC/XC-W/XCR-W (4-Strokes)
  • Hot  28 replies

Should I buy this bike? help....... by Numsa Hul

Dirt Bike   General Dirt Bike Forums   What bike should I buy?
  • * * * * *
  • 10 replies

Wilson the Blue Privateer by jetfuel

Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  50 replies

2016 YZ450 by CaptainKnobby

Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies

Snake pit oct 30th by The Anvil

Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.