Pw80 Carburetor install and how to adjust carb

Do you have a leaky carb in your PW80?. I did, and I couldn't get the leak to stop after many float adjustments and changing out the needle valve. So I purchased a brand new OEM carburetor, along with new cables, throttle tube, on off switch, and grips. I show how I took apart all of the parts and installed new parts. I purchased all my OEM parts from PARTZILLA, they were all in stock and shipped quickly. Thanks PARTZILLA for the great service. At the end of the video I show how to adjust the carb to get it running properly. I did fix the leaky issue for now. If you liked this video, be sure to check out all my other videos on the PW80. I have a few other projects as well you can check out on my channel. Be sure to hit the LIKE button, and SUBSCRIBE for more content in the future. Leave a comment or question below I always respond to the positive comments. Cheers, and thanks for Watching!.
YAMAHA OEM PART NUMBERS USED:
Carburetor: 10-21W14101-01-00
Throttle Tube: 10-434-26243-12-00
Handle ON/OFF Switch: 10-21W-83976-00-00
Throttle Cables: 10-21W-26311-02-00. and 10-21W-26312-01-00

[@Crystal9123.]

I just bought a 05 pw80 for myself to learn, thank you for this video! I feel wayy more confident going and taking my bike apart. I have buddies to help out but I’m not here to wait on them! Lol thank you so much sir!

[@bigair0176]

Awesome glad it was helpful. Cheers!

[@arthurhornby3772]

Hey, I just bought my daughter a 1998 Yamaha PW80. I want to thank you for your videos. They are super helpful. I really appreciate it. Mine idles way to high. I just replaced the carb and now know how to set it because of this video. Once again thank you

[@bigair0176]

Glad it was helpful. Cheers

[@EBthere]

When I had a bowl/overflow leak I couldn't stop on my Suzuki FA50 Mikuni - I found out it was the o-ring at the base of the needle valve seat housing. Anyway, great video.

[@bigair0176]

Good to know! Cheers!

[@amitrithimas1706]

Your a hero you just help me get my dirt bike back running

[@bigair0176]

Glad to help brotha! Cheers!

[@McGuinness89]

Thanks for all your videos dude. Helped me out once again. Changing an aftermarket carb to a new OEM one 😁

[@bigair0176]

Yea oem the only way to go unless you get it professionally tuned. Glad to help. Cheers!

[@McGuinness89]

@@bigair0176 looks like I had the same aftermarket one you had. Leaks gas like crazy! I bought some fuel filters to go inline with it. It'll be fine even though it's mixed gas right? Thank you

[@macaholik9789]

Great video buddy Helped us a ton 🤙🏻

[@bigair0176]

Awesome. Glad it was helpful. Cheers!

[@ToolManTaylor]

Great Vid as usual bud, Bike is looking sick

[@bigair0176]

Thanks TMT!...I will only have a few more videos for this bike upcoming. Cheers

[@jamesbond2472]

Great video. Helped me get mine going.. Thanks..for your efforts.

[@bigair0176]

Very good. Glad to help. Cheers

[@milksoundlhh2078]

Thanks for the explication !!!!

[@bigair0176]

Anytime! Glad to help. Cheers!

[@sports7991]

Hi! Two questions for you. 1) I also have that rattle noise on my bike. Any idea what that is? 2) The tube coming from the top left side of the carb looks like it connect to something. I tore mine down without noticing what, then I noticed you left yours open to atmosphere. Is this some sort of breather? If so, shouldn’t it be filtered? Thanks in advance.

[@bigair0176]

The rattle is more then likely the 2 stroke motor. Could be rings or exhaust but these bikes are known to rattle. Typical two stroke. All intakes should either be closed off or have a hose on them. Not sure if your seeing what looks like a hole but isn’t a hole.

[@smokeypitbbull]

Ive got a pw80 which ive installed a new gen carb on it. Runs and idles great but stalls as soon as i put it in gear. Any advice? Also drips a bit of petrol from overflow

[@bigair0176]

Lol. Not sure but exp tells me anything other then stock seems to leak. I have not found or heard an aftermarket that works. Hope you find one. Cheer

[@syn502]

Hey man I have the same exact issue did you find a fix! Please enlighten me.

[@mr.wizard2028]

Thanks for sharing your repairs Love all your maintenance videos

[@bigair0176]

Glad you like em. Hopefully they help you out. That’s why I do em. Cheers!

[@TherapyWithRicardo]

Thanks! 👍🏼

[@bigair0176]

Hope it was helpful for ya! Cheers

[@chrismancuso6436]

I just picked up a 2002 pw80, put a new carb on and it starts and idles fine, as soon as I twist the throttle any it Boggs and if I hold the throttle open long enough it does. Any idea what could cause this?

[@bigair0176]

I suspect your pilot screw isn’t set correctly. I would start there. If the problem persists take carb off and clean it. Your pilot screw position all depends on a variety of things like the condition of your motor, elavation, plug condition, reeds, and possibly compression. But start with adjusting the pilot in or out at like 1/4 turn at a time till you have a crisp throttle response. Just make sure motor is warm before you adjust it. Hope that helps.

[@Zoofactory]

Lucky kid. ❤ Can I ask what you used to buff/clean up the tank plastic. I’ve got a KX 60 tank and a PW 80 fender to do. Grit size/ wheel or cup?

[@bigair0176]

I don’t remember the grits off hand. I know I used wet sanding paper so it was quite a fine grit.

[@TAKETopicS]

PUT CARB ON STRAIGHT UPWARDS AS YOU CAN REALISED THIS IS 1 OF THE REASONS PWS RUN BAD IS FLOIAT THEN INCORRECT CARB ANGLE

[@HaydenGenetti-vg4tu]

Sir question do I have to remove the gas tank to replace the throttle cae

[@bigair0176]

There’s like 3 bolts holding the tank on and the cable usually goes under the tank. Would be easier for sure to lift the tank a tiny bit. Cheers

[@stevenfrederick4997]

Do you have a link to get the box for throttle after you delete the oil pump?

[@bigair0176]

I’m sure the local Yamaha dealer or if online try partzilla they have tons of oem Yamaha parts. Easy and quick too

[@josetomas8220]

How I just a clutch of pw 80 Yamaha

[@bigair0176]

Clutch is centrifugal. So basically throttle engages the clutch. You will need to pull it apart if it’s hooped.

[@michaelrichardson6242]

Hi I have a pw 80 for my son had new carb fitted looks all good but when starting with Chork on then just bogs out when going to rev could it possibly be a spark plug thanks for any help

[@bigair0176]

I am assuming you turned choke off and it still ran or did it die?

[@michaelrichardson6242]

Nah once chork was off just seems to die even when i try to use throttle

[@bigair0176]

@@michaelrichardson6242 ok. So next step will be to adjust the pilot screw. Make sure your air filter is clean as well before you adjust the pilot screw. Depending where your located above sea level will determine how much you need to adjust the pilot screw. Just remember to adjust the pilot screw when the motor is completely warmed up. I can’t remember because it’s been a while. But I think mine was like 1.5 turns out from bottom. It’s in the video which one is the pilot screw. Is it an oem carb or cheap Chinese aftermarket carb?

[@michaelrichardson6242]

@@bigair0176 great al give that a look in the morning it was just a cheap after market 1 tbh thr proper carb seems good still clean aswell pins all looks to be clean and clear never checked the air filter as just bought the bike few days ago did seem to be idling OK but once got it home when seem to rev just cut out shame cannot send vids on here then you may know bit better lol

[@bigair0176]

@@michaelrichardson6242 I would definitely run the oem one over the aftermarket carb. You will find the aftermarket one will give you nothing but hassles. I am speaking from experience. I only run oem carbs from now on unless it’s an improved aftermarket carb. The cheap ones don’t seem to work very well. Hope ya find the problem. Clean air filter and adjust the pilot screw from there. Let me know if you figure it out. I have a few vids on adjusting carbs on my channel. Cheers

[@connorKnudsen]

Hi

[@bigair0176]

Hey Connor!

[@MrHattrick300]

Do you have issues with the throttle sticking after removing the oil injection?

[@bigair0176]

Nope. Works fine.

[@wsg4918]

yo, my pw80 carb has a cord that keeps it attached to the dirt bike and I don't know if it's suppose to be there or not.

[@bigair0176]

Weird are you sure its not just the throttle cable?

[@wsg4918]

@@bigair0176 Im pretty sure it is the throttle cable but it has a cord that we can't even cut or get off.

[@bigair0176]

@@wsg4918 if you unscrew the top of the carb it will come out of the carb.

[@evanwilliams2602]

I did this the same way u did and my pw80 has alot of throttle free play even adjusted out and the throttles not returning this things a nightmare dude.

[@bigair0176]

Is it an oem cable?

[@evanwilliams2602]

@@bigair0176 pro motion.

[@evanwilliams2602]

I think I found my problem. It's the inside of that tube the cable that goes to the handle bars The cable doesnt stay tight inside that plastic piece that the 2 cables attach to. It's one thing after another with this bike worst bike I've ever bought for my kids. If it's not cable problem it runs like crap. Replaced everything about know to man on this bike and it's still breaks somehow

[@bigair0176]

@@evanwilliams2602 I would recommend an oem cable. If you measure the aftermarket. They always seem to long. I bet that fixes your problem

[@evanwilliams2602]

@@bigair0176 I might just get the oem one it was like 50 bucks at my local yamaha😮 it comes in a bunch of piece I do not use oil injection anymorw

[@gunsandhorsepower]

In your air box does it have an airliner cause when I got mine it didnt have one but when I put one in it it doesn't want to run

[@bigair0176]

Do you mean a filter? They should have a filter in the air box. You may have to adjust the carb if you didn’t have one before. An air filter will restrict a bit of air flow but not a ton

[@gunsandhorsepower]

@@bigair0176 thanks when I got it it didnt have I hor the wrong one bid its bog enough to bother the whole

[@brenden_m]

uhm i have a problem with mine i bought mine for 300$ i crashed it and bent the shifter and i bent it in place know the 2nd gear has more power then 3rd and 2nd goes faster

[@bigair0176]

Not sure why that would be. Maybe your top end is starting to lose compression and the taller gear it doesn’t have the power anymore.

[@imranzen7691]

What kind of jets do you have?

[@bigair0176]

Just the stock ones that came in the new carb. Can’t remember the jet size off top of my head

[@youngremy8633]

I bought one and the throttle doesn’t engage when giving it gas I checked the bike and still don’t know what wrong

[@bigair0176]

Could be a variety of things. Could have a pinched or broken cable. The slide in the carb could be installed wrong. Could be an electrical issue. I would start at the top at the throttle and work your way down to the carb. Hope ya figure it out.

[@youngremy8633]

I got it to give throttle but the needle gets stuck causing it to stay opened it doesn’t have the oem carb on it

[@bigair0176]

@@youngremy8633 ya some of the aftermarket carbs are inadequate for sure. Have you checked to make sure the slide is in correctly. Basically make sure the slot is lined up with little nub on the inside of the channel. Could be why it’s sticking wide open or your cables are binding as well

[@youngremy8633]

@@bigair0176 not sure what you mean

[@bigair0176]

Pull the top off the carb and look down inside where the slide goes in. There is a little metal nub about 3/4 down on the inside of the carb. Then you line the channel up on the sleeve to the nub. It should slide down easy. If it’s not lined up the slide will not go in properly. If you have to force the slide in your doing it wrong.

[@cathrynzenger8256]

Too much talking, get down to business

[@bigair0176]

Ikr. Cheers!

[@catalinacatalina1474]

Hi, for 80 cc malossi with malossi exaust and 21 carburator what idle should it be? Now I have 50 idle wich I thinks to big... main is 98.. thank you

[@bigair0176]

Depends on a few things. Usually altitude and obviously the air fuel will be different. If you start with the pilot screw first then work on the idle once you have crisp throttle response. Only turn pilot out a quarter of a turn at a time to find the right air fuel mixture. Good luck!

[@onlysnaps69]

new deckals 💀

[@bigair0176]

Yup new decals. Cheers!