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Newbie to Cats

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Post  BiscuitLover on Fri Jun 19 2020, 15:34

First topic message reminder :

Eyup!

The names Reece and I recently bought my first Cat. Its a 2001 model in red and the PO's taste is questionable (sorry if they're on here! Wink )... a half pink seat, pink handles on the rear, Tasmanian devil stickers everywhere, LOTS AND LOTS OF CARBON WRAP, a giant cat sticker on the windshield and to top it off metal spikes in the screw holes that hold the screen on! The good points are that they fitted a digital speedo and LED lights and heated grips (not sure if these work.

I bought the bike last week as a none runner with no MOT. It turns over, has good compression and seemed in good shape. Anyhow fast forward to yesterday where I took delivery of the Cat and I managed to get it started within 10 minutes with assistance from some easy start (I know, don't judge... I just wanted to see what the engine sounded like). It wouldn't stay running on its own and since it had been stood for 5 years (my assumption based on when it last had an MOT) I decided to pull it apart and have a go at the carbs. Other than a few strong words, a lot of grunting from me and rounded off screws from the PO, I managed to get them off - HOW MUCH OF A PAIN IN THE A**E ARE THEY TO REMOVE?!

I'm not a stranger to the inside of a carb body, my last bike was a 1982 Yamaha XJ650 Maxim US Import, also a none runner (I can see a theme starting here), which I broke apart from the rack and completely stripped down changing all seals & cleaned up the insides in an ultrasonic bath.

On the Cat I've not taken them from the rack. I've taken the tops and the bowls off, removed all screws/jets/needles including A/F mixture (counting the current setting they were at and setting back to it... all were 1 & 3/8ths out as they are at factory setting) and blasted with carb cleaner and sprayed all orifices that I could see. They weren't as gummed up as a I thought however they were coated in varnish and had oxidised after being stood for so long so I used the trusted boil in water with a splash (bottle) of lemon juice thrown in for good measure... they came up a right treat!

So that is where I'm at at the moment. I lost a lot of coolant when I took the carbs off even though the pipe was kept upright so I'll need to flush the system and replace that whilst the carbs are off.

My next steps are to give it a service: oil, oil filter, air filter, spark plugs and clean the chain up/check tension. I'll then rebuild the carbs once the new gasket seals arrive and then balance them using the Morgan carb tuner pro that I have - amazing piece of kit.

I do have a carb related question which I'll post in the fuelling section of The Workshop so if you read this please check that out for me!  Very Happy

Here's a link to my Google Drive where I've added a few pictures that I've taken as I've gone along. They're not in any particular order and are mainly reference points for me to show me how it came apart as well as showing some before and after cleaning pictures.

Oh and if you made it this far, my favourite biscuit is a chocolate hobnob!

Happy riding!
Reece
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Post  bobh on Fri Jun 26 2020, 23:08

Are you absoultely sure that all the jets are clear? The holes are quite tiny and can easily get clogged up with residue from old petrol, and even ultrasonic cleaning doesn't always shift it. I've found blasting through with carb cleaner from an aerosol usually does the trick.

Good luck - Bob

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Post  BiscuitLover on Fri Jun 26 2020, 23:10

Thanks Bob, yes I’ve had them apart twice. Used carb cleaner spray and boiled them. Then sprayed again. When I took them apart the second time they were just as clean as when I did it the first time. All the old fuel was drained and flushed.

Waiting on a new pump and will take it from there.

Cheers
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Post  yamahamad on Sun Jun 28 2020, 16:45

Have you replaced the fuel filter?, overlooked by a lot of people & could be the original & blocked partially
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Post  BiscuitLover on Sun Jun 28 2020, 17:04

Yes mate I have
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Post  furball Yesterday at 10:14

Any update???
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