RUbbers

BONLY1 · Post by **BONLY1** » Wed Mar 15, 2017 8:35 pm

Just about to clean up a set of carbs for my Exup.
Unable to recognise smaller 'o' ring arrowed.
I know all the others.
Must be an age thing

Anyone help please?

Post by **nuggitt** » Wed Mar 15, 2017 9:18 pm

Going by memory. I think it sits under the plastic part that holds the emulsion tube. I'll have a look at my spare carbs in the morning to confirm it.

BONLY1 · Post by **BONLY1** » Wed Mar 15, 2017 10:13 pm

nuggitt wrote: I think it sits under the plastic part that holds the emulsion tube.

No, from what I've already seen, that's the thinner of the two large rings.
The thicker of the two large rings is the float holder ring while the thicker 'small' ring is the one that sits at the top of the carb under the cap.
So where's the last one go? Great if you can help nuggitt, thanks.

Post by **nuggitt** » Wed Mar 15, 2017 10:33 pm

Hmm you've got me thinking now. I'll have a gander tomorrow.

Post by **nuggitt** » Thu Mar 16, 2017 11:47 am

Here we go Bonly. It looks like #5 to me.

BONLY1 · Post by **BONLY1** » Thu Mar 16, 2017 8:33 pm

Thanks for going through all this for me Nuggitt.
I'd found the 'o' ring on the pilot air screw, same as in #5 of your pics.
But I'm still unsure, as can be seen in my pic here, 'cos the supplied unidentified ring appears too big. All the others are fine.

BONLY1 · Post by **BONLY1** » Thu Mar 16, 2017 8:40 pm

Can't seem to bring up the tech data site at present, but I do recall seeing an 'o' ring shown with the main jet on the carb diagram, but I ain't physically seen a ring around any main jet so far.

Post by **nuggitt** » Thu Mar 16, 2017 8:46 pm

I'm a bit stumped now Bonly. I'm wondering if the old #5 has shrunk over time. I'm scratching my head now.

BONLY1 · Post by **BONLY1** » Thu Mar 16, 2017 9:05 pm

I've always got bits and bobs left over after any work I do, so reckon the unidentified rings are gonna be the ones left over.
I'm stumped too, but will try without.
They're too big to physically fit into the pilot screw orifice without twisting.
Maybe bad manufacture process?
Or maybe just me - ain't got a clue!

Thanks anyways

roadrunner · Post by **roadrunner** » Thu Mar 16, 2017 11:53 pm

If I remember correctly I also found those O rings too big and just refitted the old ones. I seem to remember that they fit against a sort of brass? dished washer. Anyway I never had any issues after refitting them.

banner001 · Post by **banner001** » Fri Mar 17, 2017 11:01 am

your main jet is supposed to face up to a square-profile rubber o-ring to give a proper seal...they degrade with time and are normally either removed with a pick, or left to rot into the recess it sits in.

part #29
http://www.cmsnl.com/yamaha-fzr1000-198 ... ml#results

i dont think your spare o ring is a replacement for this one, maybe its a superfluous one, my guess would be maybe some models came with a modified float bowl to take a carb heater circuit and its the o-ring for that??? pure guesswork, ive never seen a fzr1000 with a carb heater.

Post by **nuggitt** » Fri Mar 17, 2017 11:17 am

I've had a look at that Jon and its a chunky o ring. Its a pity we can't get hold of the manufacturer to make a proper one to go in the kit.

banner001 · Post by **banner001** » Mon Mar 20, 2017 9:17 am

i know its a moot point now Bonly1 as you have already bought your seal sets...but you really should have gone here first:
http://litetek.co/Carb_Kit_Yamaha_FZR1000_89-95.html

not only does it have the washer and o-ring for the pilot jet needle, but it also has the square rubbers for the main jet.

blair/maelstrom/lite-tek (he goes by many names) makes really good kits, never had a single problem with any of them that ive bought, and ive bought a few

BONLY1 · Post by **BONLY1** » Mon Mar 20, 2017 12:10 pm

Many thanks to all who've helped here and particularly to banner001.
Never seen/found or searched for that site before and may well place an order anyway as I have two sets of carbs here.
Looks to be a really useful link for anyone sorting carb's - added to my favs!

Post by **nuggitt** » Mon Mar 20, 2017 12:14 pm

Having seen these new seal kits. It's inspired me to think about refurbishing a spare set of carbs I've had in a box for years. That'll be a nice little job for next winter. Cheers Banner lad.