Carb Rubbers wrecked - big job?

[herulach]

So, cleaning the fazer this weekend I noticed that the carb rubbers (which have been on their way for a while) have no developed distinct cracks, through which air will definitely be leaking.

First off, is it going to do any harm running it like this for a bit (a couple of months, maybe 1500 miles) till I can properly afford the new ones (any ideas for bodges would be awesome).

Second, Is there anything else worth doing while I've got the carbs off? Tonnes of carb cleaner through them is a given.

Lastly, why are they so fucking expensive? £95 quid for 12 inches of rubber hose, surely there must be a cheaper way?
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YBR 125>FZS600

[stinkwheel]

I presume you're meaning the airbox rubbers between the carb and the airbox?

Won't do much harm I wouldn't have thought. If they are really bad, it'll draw air through them rather than the filter and may run slightly lean. To compensate, it'll bugger up the vacuum through the carb slightly so it'll be down on power.

Net result. Not much you'd notice.

Brand new airbox rubbers are a piece of piss to fit to most bikes because they are soft and pliable. Taking old ones off and on is a total nightmare.

If you have no reason to suspect you have a carburettion problem, leave them alone. At most I'd balance them.

I've used self-amalgamating tape to patch them up in the past.


If it's the inlet manifold rubbers (between the carb and the engine). It would be more of a problem if they were leaking air. Can make you run seriously lean to the point of holing a piston. If they were leaking air, it would probably have a rough and intermittant idle, possibly reving itself up when sat on tickover.

There is a simple test for leaky inlet manifold rubbers. With the engine at tickover, spray WD40 or EZ start over them. If the revs increase as you do so, they are leaky.

They are so expensive because Yamaha know full well you can't get them anywhere else so they can charge whatever they want and you just have to bend over. Most motorbike spares are like this unless they are commonly enough used for someone to make a pattern part.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[temeluchus]

I've done a temp bodge on inlet rubbers (engine side) using slivers of fuel hose in the cracks covered by silicone sealant.
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Some shite cruiser. Now with guns and FREEDOM!

[herulach]

Yeah, its the inlet rubbers. WD40 makes a slight increase in revs but not huge.

Idle is reasonable, slightly up and down, but only by about a needles width.

May try the amalgamating tape route as a temporary fix to cover the next few weeks.
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YBR 125>FZS600

[Suntan Sid]

New inlet rubbers will be far easier to put on than the old ones will be to remove!
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"Everybody needs money, that's why they call it money!"

[N cee thirty]

fazer carb rubbers are shit

mine are all cracked,but don't think there too knackered yet

i think someone used alraldite on some once
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[garth]

I changed mine, they came off easy enough and new ones made quite a difference to the performance!

PITA to put back on though.
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You ain't a has been if you never was

[kramdra]

they are quite thick rubber?!

I thought engine vacuum was very strong. I would be careful that bodged repairs dont get sucked in.

look on ebay/breakers. I imagine most bikes are around the same size, so lots of choice

[Casper]

Get down to Halfords and start opening boxes of inertubes untill you find one that would slip over your rubbers. Cut right lenth and slip over cracked rubbers. Stick some glue in if you must but it will do a not bad job till you get new ones.

[stinkwheel]

If they're very stiff when fitting the new ones, soak them in a pot of very hot water from the kettle. They'll go soft and pliable (and will scorch your fingers when you handle them, there's a magic temperature where they are still soft but can be handled without injury).
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.