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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Michael Jordan, enjoying a meal at sunset, Zangskar Valley, India

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Photo by Michael Jordan
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Zangskar Valley, India



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  #1  
Old 9 Nov 2009
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Carb rubber query

I'm putting the engine back together after a lot of hassle getting the old exhaust headers out (see other threads, had to take cyl head off). The carb rubbers have split into two pieces - not a split in the rubber, but the rubber tube part has separated from the metal part that bolts to the cylinder head. I can't see how this would work, as there is nothing actually holding the carbs in place - just the rubbers for the airbox and the rubbers for the intake. I'm guessing that the rubber and metal should be bonded together. But in the parts catalogue they are listed as two separate parts - Joint, Carburetor 1 and 2, 43F-13586-01 and 1VJ-13596-00 - so they must be designed to separate.

Do I need new rubbers, or is it correct to put the halves back together with some kind of sealant?

Second question: there is no room to get the carbs between the head and the air filter stubs. Do I have to dismantle the airbox to get them in? All advice gratefully received.

I've stopped work because a) it is dark, and b) I'm starting to get into bodge-it-and-bang-it mode. Sadly, it looks like the little feller won't be back on the road for another week.
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Old 9 Nov 2009
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You can loosen the airbox and move it a few inches backwars.

UNder the seat theres 3 bolts, and then a bolt around the battery and a rubberjoint in the back, and you probably need to take the right side of the airbox of.

Sounds like much, but its sone in a couple of minutes, and really helps.
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Old 9 Nov 2009
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the 2 part no's refer to left and right rubbers they are slightly different sizes.
they should be in one piece
i'd stick em back together with epoxy or a good silicone adhesive as there is not much space between the carbs and the airbox it would be very hard to fit them after the carbs but not imposible but that would also help keep the repaired stubbs in check
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Old 10 Nov 2009
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Jens - I have loosened the airbox to allow it to move enough to get the carbs out, but there isn't enough movement to get them back again I will try what you say. It isn't a big job, but I wondered if there was a 'trick'.

Wolf - well spotted, I had missed the fact that they are different shapes. The LH one has that funny stub on it as well. I've also done a bit of research and it seems that the rubbers separating from the metal is fairly common. I've ordered some new ones, anyway. Might as well get it right now I have come this far! The problem with fitting them after the carbs is the access to the inside allen bolts. When taking it apart, I pulled the carbs out and then took the rubbers off, but it's not quite as easy doing that in reverse.

Work all week, now - I'll start again next weekend. Meanwhile, the Pan gets another week of commuting duties.
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Old 10 Nov 2009
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Do a search on Gorilla glue! Worked great for me. I had the exact same condition. Steve
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Old 10 Nov 2009
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i find an allen bit in a 1/4" micro ratchet ring spanner is great for getting in there
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Old 10 Nov 2009
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Quote:
Originally Posted by DAVSATO View Post
i find an allen bit in a 1/4" micro ratchet ring spanner is great for getting in there
Hmm. I have a set of ratchet spanners, and I have an allen bit. Might try that.

Thanks!

(How come I never think of these myself?)
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Old 11 Nov 2009
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Just for information, I got the rubbers from a guy called 'bikebusiness' on eBay. 43GBP including postage, ordered Monday night, delivered today (Weds). They look good quality and are exactly as the originals. Well pleased with that.
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Old 15 Nov 2009
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Cheaper through yamaha direct, they order from holland, 25 quid a pair.

Sorry.

The bond between metal and rubber looks well dodgy now - but bear in mind its 20 years down the line. It was bound to separate sooner or later.

Do the carbs whilst they are out.

enjoy G
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Old 16 Nov 2009
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Damn! Why do I always hear about these deals after I spent the money?

The originals were in good order when I started, but I was a bit brutal in taking them out and they parted then. No harm in having good ones, though. The bike needs to be reliable.

I didn't do much to the carbs when they were out, as the bike was running perfectly before. I just checked the float levels, but I left everything else alone. Carbs and computers - if they are working, stay well away!
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