Hi all i have got my wiring sorted and had it started tonight

It was running rough as hell and no.2 exhaust branch is cold to touch.

It has a spark so how do i check if i have fuel present?

Cheers

[Edited on 20/3/07 by locoboy]

carb or injection?

Sorry

Its carbed

plug wet?

is the float chamber filling up?

plug was not what i would call wet and it did not smell of fuel.

You will have to bear with me..............Float chamber thats just obscene!

How do i check this float chamber thingamywhatsit?

sory didn't meen to swear!

on the bottom of each of the carbs you have a float bowl, you should have a drain screw on each of the bowls, undo the one on no2 carb and if its filled upit will leak.

Maybe just try tapping gently around the float chamber just in case it just got stuck a little.

open the float chamber bolt a bit to see if fuel is draining out. You need a 5mm allen key.

My favorite trick is to squirt WD40 into the mouth of the suspect carb when the engine is running. If it has no fuel then it will spring into life with WD. Not too much though.

ok chaps,

Will give it a go tomorrow evening.

Thanks

First thing I'd try is new spark plugs

Phil

Already tried it

Why didn't you say so then in your first post. Might have saved me looking like a twat.........

Phil

quote:

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Originally posted by Hellfire
Why didn't you say so then in your first post. Might have saved me looking like a twat.........

Phil

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When engines are left standing without fuel for a while, they are known to develop a biege fluffy corrosion around the float needle which stops fuel flow into the carb...

If there is no fuel in float bowl number 2, then whip the carbs off, unscrew the crosshead screws on number 2 float bowl, life the float bowl off holding the carbs upside down, and you should be able to se the needle valve... where the fuel comes into the bowl..

My bet is clogged with fluffy corosion

Have you tried cleaning the jets out? Had a blocked jet on a Dellorto carb in the past after they sat for a while as petrol doesnt really like sitting.

Paul

[Edited on 8/3/07 by Paul TigerB6]

quote:

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Originally posted by Hellfire
Why didn't you say so then in your first post. Might have saved me looking like a twat.........

Phil

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Have you checked you have the leads the right way round.
Sounds silly but I had mine the wrong way round, the engine will run rough and not all your exhausts will get hot!!

I have fuel in my float chamber,

And i have the plug leads in order 1-4 from the sprocket end to clutch end.

I have noticed that i am missing one of the rubber clamp type things from the engine to the rubber carb mounting collar on no.2 Cylinder.

Dont have a spare one so will whip the carbs off and leave one of the other cylinders without the clamp and see if the symptoms move or not.

Could do with getting another one really though

Right,

I got a new clamp and clamped it all up but its still not firing on No. 2.

No.1 seems a little off too.

I sprayed a little brake cleaner down the inlet and it ran a little better.

I have fuel in the loat bowl.

What else could be stopping it drawing in fuel?

Im close to hearing it run propperly

Have you tried removing the jets and maybe swapping a couple of them over?? Sounds like you have a blockage (ooo err) somewhere.

Paul

have you checked the carb diaphragm on number 2?

Is the carb slide moving up when you throttle the engine?

Right Carb diaphragm,

thats the black rubbery thing under the top cover?

I have not had it out as yet, should i be looking for splits etc in it?

I cant actually get the engine to run with throttle in order to see if the carb slides are moving under throttle, should they move when its turned over and fires?

I have looked in the inlet when im cranking it ( im waiting for the carb backfire to get me in the eye!) and i can see what i think is small ammounts of fuel running down towards the butterfly on numbers 1,3 and 4.

Is it a big job to whip the carb apart to check the main culprits?

Can i put brake cleaner into the float bowl ( take the drain screws out and squirt it in) to clean it out, or would it possibly degrade some seals or something?

Sorry for all the questions!

deffo a blocked jet then

just take (all the 4 off in my opinion)

and give then a good clean.

TKs

start engine

look down carbs and rev engine... what do the slides do?

Do they all move together?

If so then probebly a blocked jet..

If not, sticky slide or damaged diaphragm

Thanks for all your help,

Ox U2U,d me and came over on Thursday evening and took the float bowls off and they were full of what looked like green algae you get on the side of a fish tank!

Most of the jets were blocked and crusty.

half an hour later the carbs were back on and a bit of fettling and she was ticking over

She seemed to rev clean through too, bit loud with only the headers on though

Thanks again to OX for putting himself out to help a bike engine numpty - at least i will be able to do it my self next time

And yes i did fire it up again after you left

I am a happy chappy now

quote:

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Originally posted by locoboy
bit loud with only the headers on though

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