1843 replies to this topic

[timmy850]

Yep, you really need a really well rebuilt set of twin carbs or you'll forever be trying to tune them. My set have just been bead blasted and had a CRK101 kit installed.

The 295 head looks to be in good nick though!

[Jase]

You probably know that SU carb rebuild kits are readily available. I did the same thing, bought a pair of twin 11/4's from ebay, the plan is to replace everything that moves. I bought a sonic cleaner to aid with cleaning these small parts, works very well especially with carbs.

[Petrol]

I'm really pleased with the head, it looks in great condition. I bought the carbs off here but planned on refurbing them anyway.

 

Stripped the green paint off by soaking in thinners

 

 

Then scrubbed with Farecla G10 using a toothbrush

 

 

The plan is to try a new throttle spindle in the body and check for any play. If the bodies need bushing I will probably just buy a brand new set of carbs. If I had my time again, I would have just bought a brand new set and had done with it. Hindsight is wonderful thing though. To be honest, you're better off with a single big carb but twins look good and sound a bit better.

 

Weather was half decent today so I did a black paint run. I'm working towards a rolling shell slowly. One of the things I need to bolt to the shell before the rear subby is fitted is the fuel tank support

 

 

Pete

 

 

 

 

 

 

[phil hill]

Pete, what "thinners" do you use ??  Is it normal celly thinners ??

 

I can get what they call gun cleaning thinners reasonably cheap for cleaning stuff, is that what I need ??

 

I don't "do" painting yet so it's not like I have any kicking around me.

 

Phil.

[Petrol]

Hi Phil,

 

Celly, whilst still available has pretty much long gone. Standard thinners or gun wash (same as gun cleaning thinners) is what I used to remove the paint from the carbs. It's great for cleaning stuff up but it does leave a residue behind. If you want to degrease then panel wipe is the best bet. To remove heavy, ground in dirt from say an old engine part the I use Turtle wax degreaser which is a water based product.

 

Hope that helps, any more Q's just ask

 

Pete

[phil hill]

Thanks Pete.

Phil.

[Petrol]

No problemo

 

Pete

[Jase]

Price of new carbs is astronomical - £600ish?? There a re a few good refurbishers about. How would you check for re-bushing? Is this a visual check?

[Petrol]

Checking the carb spindle for wear is pretty easy. If there's any play in this bearing then it needs either a new shaft, bushing or both. I'm going to try a new shaft in the hope it gets rid of the play

 

 

Seam sealed the rear subby and primed over the seam sealer

 

 

Then sprayed it black

 

 

 

Used the spit frame to hang it up the the garage

 

 

 

 

Bit cold for these games - I must be mad!

 

Pete

[Artstu]

Nice. At least you've not got 2" of snow like us. 

[Petrol]

Nice. At least you've not got 2" of snow like us. 

 

No but it's not ideal spraying when it's so cold. I used a bit more thinners than usual as the paint was so thick.

 

The problem with twins carbs is, if everything isn't bang on they run out of sync which can lead to erratic idling and fueling. Tried a new spindle in the carbs and result no play whatsoever.

 

 

In the kit are bushes to fit into the throttle body if needed

 

 

Complete kit looks like this

 

 

Should keep me busy for a while building that lot up

 

Pete

[Down&Out]

Cor, i love a clean carburettor.

[Jase]

How are you going to finish these? I was looking at buying a polisher (upright mop) to polish mine up. Although my set have been sat on a shelf for the last 2 years.

 

Looks good and good news regarding the body.

[Petrol]

I used grey scotchbrite then Farecla G3. You can go mad with these and polish them up like chrome but I prefer the more original look

 

 

 

 

 

Pete

 

 

[Ben_O]

Much better bare then that green paint.