carb o rings

[montana.man]

any one know where i can get the cheapest o rings for the carb boots i think i need new ones . wanna get em' cheap

[Vlad]

i just bought mine at home depot... they r like $2.58 or so for 10 of em

[Kreylyn]

any one know where i can get the cheapest o rings for the carb boots i think i need new ones . wanna get em' cheap

Any of the dealers offer them locally, or you can buy online. About $2 apiece. If you match up others elsewhere, make sure they are not overly thick. If you get them too thick, you will crack your boots when trying to torque them down.

Krey

[Black_peter]

boots?

[Kreylyn]

boots?

I guess technically they are called "Intake Pipe Assembly"... but... most mechanics I know call them "boots"...

Krey

[montana.man]

boots

how about "intake pipe assembly boots?"

[Black_peter]

o-rings?

I'm confused, neither my airbox to carb nor the carb to head boots have o-rings..

[scottynoface]

I'm thinking he means the big rubber boots...

[Black_peter]

Nope! I'm stupid, there is an o-ring there.
I thought I took mine off last year, I didn't. I just replaced the screws..



Sorry

[Kreylyn]

Nope! I'm stupid, there is an o-ring there.
I thought I took mine off last year, I didn't. I just replaced the screws..



Sorry

Those things get so smashed up flat in there, and I believe the use some black rtv gasket sealant on them OEM.... it's really easy to miss them being there.

Common leak point for older Kats though...

Krey

[foxox]

The orings between the boots and the cylinder heads? Don't those have to be made of a certain material so they don't burn up... "Viton" or something? Not nitrile...

Nitrile is "Buna-N" on this chart:

http://www.marcorubber.com/material_chart.htm

I just ordered OEM ones online a week ago so I wouldn't risk melted/burning oring surprise. Still waiting on them in the mail. I think http://www.ronayers.com had the best price. I ordered a number of parts together, and ronayers had the lowest total price (compared with http://www.bikebandit.com/ and http://www.cheapcycleparts.com/); the orings themselves I cannot remember exactly.

[Wild-Bill]

Those things get so smashed up flat in there, and I believe the use some black rtv gasket sealant on them OEM.... it's really easy to miss them being there.

Common leak point for older Kats though...

Krey

I don't think the factory uses RTV in there. That seems more like an attempt to fix a leak by someone who didn't realize they could just replace the o-rings. I thought about using RTV in there until I realized that the slightly raised ring was actually the remains of an o-ring. (Yes, it was mashed that bad!)

[Kreylyn]

I don't think the factory uses RTV in there. That seems more like an attempt to fix a leak by someone who didn't realize they could just replace the o-rings. I thought about using RTV in there until I realized that the slightly raised ring was actually the remains of an o-ring. (Yes, it was mashed that bad!)

After pulling about 7 sets of them, and some of them obviously never removed... I'm finding a thin layer of black material around the edges and such. Could be a film from the boots or something... but surely looks like something.

The last set I put back on this weekend I did include a very thin layer of high temp gasket with new orings. I guess I'll see how that works +/- for me. It was on BadFaerie's new to her Kat, so it will be around for a while.

Krey

[Wild-Bill]

I think that "thin film" was the remains of the o-ring!

[steves]

I've never found RTVs on those in take boots on the one's I've messed with... although it's possible that the oring actually started to break down and/or smear at some point.

http://katriders.com/vb/showthread.php?t=86924

I tried using RTV to fix one that was cracked once, but it didn't help at all.

Also, new boots come with new o-rings... and from what I've noticed when the orings are beat up... the boots aren't too hot either.