Zip Ty Fuel Screw?

42 replies to this topic

Posted December 15, 2004 - 08:03 AM


Anyone have one of these? How does it install? Do you have to screw out the existing screw to install this or do you have to take the carb apart?

  • bigc

Posted December 15, 2004 - 08:23 AM


I just got one,but haven't installed.You have to screw out your old one and just replace with the zip ty.Do not lose the tiny spring and washer when you remove your old one,other wise you will have to order a complete fuel screw,sping ,and all from Yamaha.

  • mkporn

Posted December 15, 2004 - 08:25 AM


There is a o-ring in there too.... Might stay in place or it might fall out... Pay attention.... It goes ....screw, spring, washer, o-ring and then carb

  • Ken_B

Posted December 15, 2004 - 08:40 AM


I installed one in my bike about a 2 months ago, pretty cool. They recommend getting a factory baseline on the number of turns out from bottom prior to removing the factory screw. This will help in installing the new zipty fuel screw to factory specs. I had problems getting the baseline because the factory screw is so hard to reach with a flat head screw driver. I set mine to 1 3/4 turns out from bottom. The bike seemed to run OK.

I was hoping maybe one of you guys can get a baseline and let us all know what it was?????



Posted December 15, 2004 - 08:45 AM


The baseline is 2 turns out.

  • yz400fl1

Posted December 15, 2004 - 08:47 AM


When I did mine in my 99 400f I had to take the bowl off and take the stock out then replace it with the Zip-Ty. From what I remember the instruxions said 8 turns from the moment the treads grab. That is when it is all the way in. Then adjust out. I have mine 1 1/2 turns cuz my bike is completely stock.

  • grayracer513

Posted December 15, 2004 - 09:33 AM


Check this:


It's for a 250F, but the procedure is the same.

  • del_scorcho

Posted December 15, 2004 - 02:59 PM


Do you have to screw out the existing screw to install this or do you have to take the carb apart?

You don't have to take the carb apart to take out the existing screw. I used a small screwdriver to remove the screw, installed the o-ring, washer and spring on the ZipTy and screwed it back in. If you don't have a small screwdriver you can just make one by filing down the end of a piece of metal or a large nail. Shouldn't take you more than a few minutes. If needed you can rotate the carb a little to get more access.

  • smokin529

Posted December 15, 2004 - 05:12 PM


I installed one of these on my '04 450...Probably the single best mod that I have done

  • sirthumpalot

Posted December 15, 2004 - 07:09 PM


Anyone have one of these? How does it install? Do you have to screw out the existing screw to install this or do you have to take the carb apart?

The Zip-Ty Fuel Screw is a must-do mod for any 4-stroke. You just remove the stock screw and screw in the ZipTy model. I would recommend giving the spring on the stock fuel screw a SLIGHT stretch before re-installing with the ZipTy screw. Maybe lenghten it by 2-3mm. This will keep the screw tight. With this thing in place you can adjust the fuel screw even with your gloves on! :cry:

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  • mxchase

Posted December 15, 2004 - 11:11 PM


I ordered one. Not sure when its going to be here though...

  • skthom2320

Posted December 16, 2004 - 12:25 AM


If you don't feel likeputting in a zip-ty, I just took a flat screw driver drill bit and a nylon standoff, drilled out the standoff and epoxied the bit into it. Makes for a super cheap and easy adjuster. I never put an external adjuster on my YZF since this always worked just fine.

I *did* put a zip ty on my CRF though because you can't get in there easy like on the YZF, and I started racing and sometimes needed some last minute adjustments. But the dang thing vibrated out!!!!!! So - be sure and stretch the spring a little to some extra tension on it and don't turn it out more than about 2.5 turns.

  • yamaboy23

Posted December 16, 2004 - 05:00 AM


the only drawback to installing that Zip-Ty fuel-screw is when you go to remove the float bowl the screw must come out......the solution is grinding that little section away from the bowl and it will clear the screw coming off to clean or re-jet

  • Wyatt

Posted December 16, 2004 - 07:22 AM


Mine vibrated out also. They are junk IMO. Use a small screwdriver bit and adjust your fuel screw for the day and be done with it. Stretching the spring a little sounds like a good idea, but when you have the assembly in your hand looking at it you will see that it is not a good option.

  • yzwiley

Posted December 16, 2004 - 07:23 AM


If it vibrated out then you didn't install it correctly. Read the directions.

  • del_scorcho

Posted December 16, 2004 - 07:36 AM


Also, make sure you don't have it out too many turns as this will increase the chances of it vibrating out. Mine is usually between 1 1/2 - 2 turns out depending on the weather. I believe the directions state that any more than 2 turns out you should start looking to up the pilot jet.

  • Ga426owner

Posted December 16, 2004 - 08:02 AM


I had mine in my 03 since I purshased the bike - never a problem - they do not fall out unless you back it out to many turns - if you have to back it out more than 3/4 turns - you got jetting issues

The float bowl is not a problem to take off either - just unscrew the fuel screw and keep all the parts together - sometimes the oring will stay in place other times it remains at the carb threads - no big deal -

this is one of the best mods to make to your 450 - :cry:

  • Nitrox

Posted December 16, 2004 - 08:15 AM


My son and I both run one on our bikes, 250f and 450f and does it make it nice for fine tuning. We've been getting big changes in temp and humidity and we've got it now where we can listen to the bike when it's warmed up and make minor changes during practice (cold damp morning). As the day goes on we can have a thirty five degree or more temp change and humidity goes to nothing. So when the 1st moto comes around we can tune it again.

Reaching in with a screw driver tip is ok but you can't do that on the gate. It does take time to know your bike and make those adjustments. And I don't think I ever made more than a 1/2 turn and most the time it's like a quarter turn.

The best thing is that my bike starts on the first or second kick every time. And that's one thing that won't happen unless you tune your fuel screw.

I do like the Zyp Ty design too. Easy to grip with your fingers with gloves on and big easy to read numbers.

2 cents



Posted December 16, 2004 - 08:45 AM


I would recommend giving the spring on the stock fuel screw a SLIGHT stretch before re-installing with the ZipTy screw. Maybe lenghten it by 2-3mm. This will keep the screw tight.

AMEN Brother!

I didn't the first time and lost my spring and o-ring when it vibrated out... Damn lucky I found my Fuel Screw laying on the ground.

You cannot purchase the spring and o-ring separately, so you have to order the entire stock FS assembly for $34.00 to get another.

Additionally.... The baseline is 1/4 turn to 2 turns out from fully seated. If you have to turn it more than 2 turns out to make it run, your pilot jetting needs to be changed.

Bonzai :cry:

  • cgaluter

Posted December 16, 2004 - 09:17 AM


Just get the screwdriver for the eyeglass repair kit. I bought mine from Longs Drug store for $1.60. The screwdriver is about 3 inches or less. It is so small that you can carry it with you while riding. I stick mine by the triple clamp with velcro and it never comes off.

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