Glad your back and well Doc !

Excellent Video ... I found all that out the hard way ... because the service manual doesn't really talk about the Vacuum Control Valve ... I think it was the cause of a gas feed failure when I was riding in very hot weather ... You really cannot test the valve unless you apply vacuum, and the factory route the tubing takes is kinda wierd ... I did purchase a straight through, but I haven't put it on yet ... good review about the straight thru valve ... Thanks ...

I miss owning a carbureted bike. It was a ritual... open fuel petcock, pull choke, twist throttle a couple times, turn on ignition, start... and the simplicity, my God how I miss the simplicity. Whenever I have too tear into my M8, it's getting a carburetor.

Welcome Back Doc!!!!! Good to see you posting once again and looks like you are doing well.... God does answer prayers. Be safe and be well Doc!!!!

Don't forget that if you switch back to the non vacuum fuel valve you're going to have to plug the vacuum line!

Sounds like switching to the old style is easier with less failure points

Great to have you back. Hope all is well in your world. I had to rewatch your older video to get my 'Doc fix'

Weird, i have the 2000 Fatboy which as you know had the vacuum petcock and I seen the price of them and the rebuild kits and said I'll just try the Pingel, so I did, the 1st one I installed I'd always forget to shut the fuel off (spoiled with that vacuum) and come out to a whole tank of gas on the ground. Did this a few times. so I got another gravity fed petcock and not once has it leaked out if I forgot to turn off the valve. But its' what I'm sticking with cuz it works. And i have the deep jiffy stand too, the one that makes you think its going to the ground and catches you off guard occasionally. lol. But thats my story on petcocks and my bike, Thanks for all your videos Doc, you've helped me out quite a few times.

Welcome back Doc. Thanks for the history lesson.

A bad vacuum fuel valve can also pull fuel through the vacuum and dump it into the intake, the fuel can then pass the piston rings and end in your engine oil.

Welcome back, Doc. Glad to see you again.

Glad you are back..stay healthy we need you

Glad to see you posting videos again Doc.

welcome back Doc, glad to you see back your feet. Keep it up and best wishes to you.

Welcome back Doc, balance has been restored in the Harley universe!!

Thanks Doc! Y'all stay safe down there in the low country with Ian passing through!

Hey Doc Glad to see you back, you’ve been missed sorely. Great tech tip as usual

Great to see you back Doc.

Great vid doc. Ty!

Your help for Harley owners is unique, thanks for all ,all these years.

Glad to see you back cheers from Australia

Thanks Doc. Glad your back. Look forward to more videos. I actually had that issue on my older 2000 FatBoy and went back to the old style petcock. One day I forgot to shut it off and someone said hey fuel is all I we the place. Now I run a 2019 Road glide and no issues as of yet except the vents in the fairing won’t stay open. Anyway you hanks again and two weeks ago at a local Arizona dealer I saw a Low Country Harley shirt and wanted to ask him if he knew of you. Someday I need to make a road trip to Low Country.

Thanks doc. I always enjoy your tech tips. Never to old to learn.

Hey Doc!!! Glad to see you are back I missed you, I hope everything is well with you now

I missed you. And I’m glad your back. Safe prayed up and enjoy the ride.

Nice to see you again Doc. Hope all is well and stays that way!

Doc, The diaphragm on my valve ('95 FLHTC) went bad 2 years ago (2020). The new valve was approx $94 at the time. I replaced the whole thing rather than just the kit because my screen was getting bad also. Another troubleshooting tip is to check the quality of the vacuum tube from the carb to the diaphragm. Mine was getting a little crispy.

Awesome content thanks Doc.

Those Keihin vacuum fuel valves abound on the major carbed brands too and are available in non-vacuum styles. They work well enough but I never run the vacuum style because I prefer manual control. If one fails and ya need to fix it quickly a Japanese dealer may have a match or close enough (bring your old one as a sample). YMMV but all my personal HDs get Pingel fuel valves. My oldest Pingel had daily use from 1988 until the mid-2000s when it started to seep. I resealed it and it's still going strong. Golan are fine too but I ensure all my aftermarket fuel valves match for convenience since I bought the Pingel rebuild kit to service my fleet. (I haven't had to rebuild any other Pingels but the kit was cheap at a swap meet.)

Hi Doc-another excellent tech tip and presentation! Welcome back! I was getting serious tech withdrawal symptoms without your regular tech videos.

Great video! I’m rebuilding a 97 bad boy right now. You just confirmed what I thought about that valve

Good advice…I just installed a Pingel on my 97 King tonight getting rid of a regular mechanical style petcock. I know this video is old but if you have a chance, I just rebuilt my cv to get ready for the season, the rebuild kit I got from Harley has a shorter accelerator pump spring than the one that came out…curious if there’s any variance between kits or what. I’m pretty well versed in carbs (4 bbls mostly) but I can’t really think of any reason the spring would be longer that was in there. I’m going to measure the compressed length but I’m looking at the longer spring will likely refill the pump reservoir quicker but potentially bottom out sooner giving less squirt…figured I’d ask if you have any insight. Thanks again and hope to meet you soon!!

Welcome back Doc you were missed. We prayed for you . Hope everything went well for you

Good to see you Doc. Interesting topic.

Glad you're back !

Good to see you Doc! Hope all is well.

Great info Doc. Thx

I'm Glad you are back ... Love yOUr video ... Je suis content . Que tu sois de retour . J'adore tes vidéos ... Merci Thanks ... From Montréal province of Québec , Canada ... A french Guy

Glad to see you’re back dock

Welcome back.

Good to have you back, so all okay with you I hope! Cheers from the Netherlands

I took the one on my 95 Sporty apart, cleaned it all up, put it back, works great.

I'm surprised you work on that old of a bike at that dealership. Dealerships in my area won't work on anything older than 10 years. You have to go to the independent shops. Of course the best Harley techs are at these shops anyway and they don't charge you an arm and a leg.

Great to see you back!, What's up Doc!!

Hi Doc, welcome back and many thanks for the information about fuel valves. Greetings from Germany ..... Harry

Hey Doc Glad to see you back!! Do have a video that shows how to repair the check valve in newer bike?

Welcome back…. Missed your knowledge.

Hey Doc Happy 4th to you and family. Like to know why Harley-Davidson does not have a temperature gauge to let us know if stuck in traffic we don’t cook our engines. We spend big money seems a gauge gives us a fighting chance

Great to c you brother. U look great man. Stay safe and thanks for vids. Ur the best

Great video, Doc - thanks much! Does HD still sell vacuum operated (22mm) fuel valves? I've been looking to replace the one on my 1999 Sportster 1200, but am not having any luck finding them online. Found plenty non-vacuum options, but I'd prefer to stick with the same type if possible.

Good info.. especially if you're on a trip.

Did Harley add the vacuum valve mid-year? I bought my 94 softail in May of 94 and it has the non-vacuum valve. I can tell when I don't turn it off due to the smell of gasoline in the garage.

Thank you Doc ,never knew of this ,may be a way to machine a blank plate to defeat this "" improvement ""

Doc if I change the factory fuel shut-off valve with an after market valve should I cap off the carb port?

Hi, Doc what will I do with vaccume hose when change to non vaccume "Pingle" ? Thanks for outstanding videos!!

Question? I have a 2021 Ultra and last year the coolant was overflowing. Took to dealer and they kept it a week. They said it needed a new Pressure Cap which they supplied under warranty. I had no problems until last month and it started to overflow again. I replaced the Cap myself and it appeared to have solved the problem again. My question, are their any know flaws with the OEM Cap that you are aware of? I searched the internet with no good answers. Any after market options? Thanks in advance.

Great tip

Yay, Doc Harley is back :)

Missed you Doc!

Can you explain the vacuum operated electrical switch and purpose please mate They can be adjusted for certain models and save money for owners

If you go the old school way, what do you do with the vacuum line? Remove it and plug it up at the carb side?

I wish we had KZfaq in the 70’s.

i have that problem but it stays on... its a 1997 FXDL... i am now going to install a Pingel petcock and plug the vacuum port at the carb...

Great video I have a 94 Electra

I bought a complete valve for my 05 xl1200 today at the harley dealer. $54 not $105 gasket was another buck thirty four

Welcome Back 👍

Had the issue with my 06 sportster, fuel pourring in the vacuum line directly in the intake, big over-rich mixture, black plugs and run like shit. I try to bypass the damn diaphragm, but it was not working well, so, for the price, i have buy a "Golan" (like Pingel but only better).... On all my previous bike i had to shut off the valve, so i had the habbit to keep turning it on the off position (even the vacuum valve).

Question..i have a 2004 harley roadking custom. Should I consider replacing the fuel pump even if I am not having issues?Some have said to because of the age.

😎👍

I have and 05 deluxe that seems like it pouring fuel from the back of it. Time for a new one I guess

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Just bought a used 2008 1200 sportster,,it has ver small leak around a black valve maybe under tank? Could this as simple as o ring or should i replace it

Can I ask a somewhat related question, in that it has to do with the fuel tank? My 05 Sportster tank has another hose coming off the right side of the tank, maybe a vent line? Can I replace this tank with an earlier model tank and just use a vented gas cap? Thank you

I have a 1997 road king fuel injected. Both check valves are leaking. I replaced the O-rings and the problem did not fix. Not sure what to do from this point, they don’t make the check valve anymore. Can check valves from a different year be substituted? I’m trying to find these check valves used and I cannot find them. Harley Davidson said they weren’t sure how I can fix the problem either.

But where do I get oem vacuum petcock? They don’t have it anywhere except ebay and I don’t really trust that

If I swap from this vacuum setup do I need to plug the vacuum port in the carb? My diaphragm leaks a stream of fuel straight down when running.

Hi DOC, In that type of Emergency if your Stuck on a Long Trip and that does go bad.. Could you Just Take Out That Diaphragm, to ride back Home...

my issue was remembering to turn it on 😂

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Second!

Is this the real Doc Harley or a computer generated robot Dok Harlie? The real Doc Harley mysteriously disappeared after a video on the EPA.😳

Really? Guy goes messing with the carb b4 determining the most simplest thing 1st??

too many gizmos on modern bikes. and yet they left the tank cross over line on FLH's and no way to drain the tank that has FI, That us unless you don't mid making a big mess with gasoline spilling down your hands , arms and onto the nice carpet on in your work shop. Dumb ass engineers should have put a drain valve in those bikes, but a few dollars would have had to be invested and they don't give a shit about the owners health and safety. Yes I read and followed the FSM and to say the least, that procedure sucks.

As always good info Doc, however I'm old school,I've been riding bikes since 1969 and only forgot one time to turn off the gas. There's no need to over think things for BOZOs who can't remember to shut off the gas. There's no need to to baby people. Ride a bicycle, Damn!!!

Most I deal with dont know how to operate a fuel shut off. Good luck teaching common sense.