Cbr900 Bike Carbs

[Guest 2b cruising]

You bloody tease.

[tractor]

where did you get manifold from

[Dean Roberts]

Sorry to tease...but the balti & beer was calling

 

 

As you can see from the picture below something don't look right with the inlet, a small object inside:

 

inlet blockage_zpsezsl2rlq.jpg Photo by Dino2B | Photobucket

 

I find out its a small piece of metal from where???

metal piece_zpsctigwzgk.jpg photo by Dino2B

 

I thought i would just get a wd40 straw and try it down the inlet:

IMG_1985_zpsrluk10pm.jpg photo by Dino2B

 

As you can see it pushes thru into the manifold without any issues.

 

Whereas all the other 3 inlets:

IMG_1986_zpsw3hy0q5k.jpg photo by Dino2B

 

Only lets the straw move down the inlet about 3mm.

So I fired up the car and put my finger over the inlets and found that all of them except one is blocked.

So eventually, it seems - what i thought was the faulty carb, is probably the only one firing correctly and has a vacuum. The other 3 has no vacuum (or very little) on the inlets and must be heavily restricted. I feel a right tit and cannot believe I missed this earlier.

 

I was wondering, can I just remove the manifold and drill the blocked inlets and is there anything I have to be aware of, size of the inlets etc.....

[HAWKNORTH]

Look on the bright side, if that had found its way through your problems could have been much greater.

[tractor]

I would drill them 3 to 5mm

[tractor]

from the pictures and the obvious poor manufacture its not a danst manifold when will you boys learn tut tut tut!!!!!

[Dean Roberts]

Cheers guys, I have learnt a lot of stuff on this outing.....engine compression, stripping carbs, balancng etc.

 

Looks like tomorrow jobs will be to remove the manifold and carbs again....

Drill the holes so they all match in diameter, clean out the manifold and make sure there are no metals bits.

 

Refit/balance/test and give feedback to you guys.

[Guest 2b cruising]

Carb expert now Dino. We all know who to turn to in future!!!

[tractor]

just get stuck in best way to learn

[Dean Roberts]

where did you get manifold from

 

The usual place.... Carbs & manifold was advertised on locostbuilders & eBay

 

Do u think the car will run a little better when I get the inlets cleared ?

[tractor]

if you get the carbs balanced yes of course it will

[tractor]

if it aint pissin it down tomorrow might pop over and see you

[Andi]

I would seal them up and get rid of the servo

 

Andi

[Longboarder]

Did you read my first post?

 

Nigel

[Dean Roberts]

Latest update:

 

Car drained, manifold removed and drilled.

Everything put back and fired the car up.

 

Carbs balanced and tick-over running sweet and the carbs now sound tickety-boo.

 

Very happy & cheers Chris for popping over and drinking all the tea