Author Topic: Refitting Cb500 four carbs  (Read 293 times)

Offline bobv7

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Refitting Cb500 four carbs
« on: February 03, 2020, 01:24:08 PM »
Hi

I've taken mine off to get them sorted but getting them off and out was quite a struggle. What methods do the learned members suggest as the best way to refit them?

Cheers, Bob

Offline Johnwebley

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Re: Refitting Cb500 four carbs
« Reply #1 on: February 03, 2020, 01:52:30 PM »
Loosen the  airbox.
Use a heat gun to soften the rubbers

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Offline Bryanj

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Re: Refitting Cb500 four carbs
« Reply #2 on: February 03, 2020, 02:22:37 PM »
Btute foce and swearing a lot plus new rubbers to cylinder head

Offline Nurse Julie

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Re: Refitting Cb500 four carbs
« Reply #3 on: February 03, 2020, 02:29:20 PM »
A pot of red rubber grease helps no end. Plus the hairdryer or a pan of boiling water to soften the rubbers.
Im a Nurse, trust me, this won't hurt.....much !!!

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Offline GTB981

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Re: Refitting Cb500 four carbs
« Reply #4 on: February 03, 2020, 02:49:24 PM »
I`ve had the carbs off my 550 3 times in as many weeks now (long story). I have found you can get the outer airbox rubbers out from the bike after releasing the clamps. The 2 inner ones I pop into the airbox. Keep clutch cable clear and the carbs slide in and out from rhs. The rubbers on my bike are new and I also use red rubber grease. I perfected this method after many a grazed knuckle.

Offline Trigger

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Re: Refitting Cb500 four carbs
« Reply #5 on: February 03, 2020, 03:13:06 PM »
I`ve had the carbs off my 550 3 times in as many weeks now (long story). I have found you can get the outer airbox rubbers out from the bike after releasing the clamps. The 2 inner ones I pop into the airbox. Keep clutch cable clear and the carbs slide in and out from rhs. The rubbers on my bike are new and I also use red rubber grease. I perfected this method after many a grazed knuckle.

Very hard to re glue the 2 inner ones once you have retrieved them from the air box  ;)

Offline bobv7

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Re: Refitting Cb500 four carbs
« Reply #6 on: February 03, 2020, 05:24:19 PM »
Many thanks, they were a right bugger to get out.......and I've ordered some red rubber grease. Don't tell the wife! ;)

Offline GTB981

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Re: Refitting Cb500 four carbs
« Reply #7 on: February 04, 2020, 07:03:25 AM »
Re-glue ? Are they meant to be glued in ???

Offline Trigger

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Re: Refitting Cb500 four carbs
« Reply #8 on: February 04, 2020, 07:34:38 AM »
Re-glue ? Are they meant to be glued in ???

If you get a old set of rubbers and look in the groove, you will see the remains of a brown adhesive. It is also on the chamber to airbox rubber  ;)


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Offline GTB981

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Re: Refitting Cb500 four carbs
« Reply #9 on: February 04, 2020, 07:36:19 AM »
Cheers for that. Kind of makes my method a tad impractical.

Online deltarider

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Re: Refitting Cb500 four carbs
« Reply #10 on: February 04, 2020, 08:07:55 AM »
Are you sure it's glue? I always thought it was either vaseline or some sort of silicone paste. I see no harm NOT to glue them.

Offline bobv7

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Re: Refitting Cb500 four carbs
« Reply #11 on: February 04, 2020, 09:04:50 AM »
Mine aren't stuck and I noticed that the 2 outer ones have a pip on the edge and there is a similar one on the airbox. I assume that they are supposed to line up?

Offline Johnwebley

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Re: Refitting Cb500 four carbs
« Reply #12 on: February 04, 2020, 09:43:36 AM »
Mine aren't stuck and I noticed that the 2 outer ones have a pip on the edge and there is a similar one on the airbox. I assume that they are supposed to line up?
The 2 outer ones are handed.

Align the dots

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Offline bobv7

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Re: Refitting Cb500 four carbs
« Reply #13 on: February 04, 2020, 10:59:41 AM »
Thanks for the confirmation :)

Offline Oddjob

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Re: Refitting Cb500 four carbs
« Reply #14 on: February 04, 2020, 11:34:59 AM »
Are you sure it's glue? I always thought it was either vaseline or some sort of silicone paste. I see no harm NOT to glue them.

No it's glue alright. I remember pulling some off when the airbox's were new and it was still slightly sticky and came off like mozzarella cheese.

If the engines been out I drop the front of the engine down by removing the engine bolts so just the lower back one is fitted, fit the carbs onto the inlet rubbers and just pull it back into place, helps if you remove the bolts holding the airbox to the frame. Works everytime and no messing with the airbox rubbers risking splitting them.
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