How to repair old rubber carburetor boots!
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- čas přidán 30. 08. 2021
- We have tried lots of different methods to fix / repair old carb boots on our dirt bikes and other equipment but have never had much success. We did find that soaking them in Aerospace 303 made them much more flexible, but it didn’t help with the cracks. We have also tried vulcanizing the rubber, but once again that doesn’t repair the cracks.
So what has worked for us is applying silicone rubber gasket seal, that is compatible with fuel, and mixing in strands of drywall fiber glass tape. I assume that stranded fiberglass would work as well. Let it dry for a few days and you are ready to go. We have actually had boots almost torn in half that are now back on bikes and have been running strong for years. Just make sure you start with a clean, grease free boot. - Auta a dopravní prostředky
That fiberglass tape/gasket maker is a great idea to keep it flexible. I used JB weld and brushed it on my carb boot years ago, but it doesn't flex. Will try this way next time.
You saved me from buying a new one! much love!
Great fix while you find new ones. Thank you for sharing this great solution.
thanks so much using it for an ol kx85
Thanks so much i just got a polini 2002 x3 and its a pain to find parts i hope this lasts a long time on my manifold.
wow brilliant, thanks for sharing
My pleasure
Thanks for taking the time to share this. Was about to use shoe goo, tire air chamber and electrical tape to fix a throttle body intake boot on a 2000 Arctic Cat zr600 EFI. Replaced it with a new one couple years ago and it has already ripped (new old stock?). Are you concerned that some chunks of the gasket maker applied under the fiberglass tape could get sucked in?
All the boots I have repaired had cracked because of age, there weren't chunks missing. However if you have some bigger chunks missing just shred up some fiberglass and mix that in with the gasket maker. Once you see how this all lays down you won't be concerned. Just make sure the gasket maker is good for fuel contact.
Heck now that I've done it a few times I almost think I could make a new boot from scratch using this technique. Basically a paper mache project.
Hi could you please make a tutorial on how to create your own rubber manifold from scratch thankyou!
I won't have the time to make a video of that for a bit, but if you just used cardboard to make the original tube between the carb and engine and then start wrapping it with fiberglass tape and gasket maker you can slow build it up to what you need and then just dissolve the cardboard away with water.
My boot is different than yours , it is just round on both sides with no bolts but it has those 2 rubber tabs on one side like yours. How do you orient those tabs or does it even matter? I pushed one side on to the carb now the side with those two rubber tabs gets pushed onto the engine side , should I keep those tabs down or up?
If you have tabs and the correct boot they should align with a notch on either the carb side or other side. If there isn't a notch or raised piece then it may not be the original boot and orientation doesn't really matter. Only reason to worry about how these boots go on is to make sure the carb is pointed the right way and make sure that there are no air leaks.
@@hotrod-machines thank you ! I did finally figure it out . I felt like a donkey when I saw the metal tab . I appreciate you answering and helping out though , alot of people wouldn't take the time so thank you.
Is there any companies that will make one I have A 86 tt225 and no new or good ones exist or around
You can make it yourself, start with some rubber hose pieces the size you need and start piecing it all together, and then cover it the way I show in the video to tie it all together. It’s basically a papier-mâché project. The intake boots don’t get very hot.
Or start with one that is a close fit and build it out or make it longer or shorter.
Would this cause the bike to run like complete crap with choke off but decent with choke on
A cracked boot will cause issues with the engine running properly. The carburetor wants to see a 14:1 air to fuel ratio, if you have leaks in the boot the air to fuel ratio gets messed up and it won’t run properly. Turning the choke on reduces the air and enriches the fuel, but if you have an air leak in the boot, turning on the choke may just get the ratio closer to what it should be. You need to repair the air leak.
@@hotrod-machines yes sir thank you
Yeah don’t flex tape them it doesn’t work I tried last night I’m gonna try this this morning
Clean the rubber really well, and let it dry afterward. Also scuff it up a bit with a wire brush or sandpaper. Then start applying. A few thin coats is better than one heavy coat.
Holy crap, 100$ for a new one for my 98 kx 125