locoboy
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| posted on 7/3/07 at 08:25 PM |
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R1 Cylinder no.2 not firing UPDATE
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]
ATB
Locoboy
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dilley
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| posted on 7/3/07 at 08:26 PM |
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carb or injection?
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locoboy
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| posted on 7/3/07 at 08:27 PM |
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Sorry
Its carbed
ATB
Locoboy
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RichardK
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| posted on 7/3/07 at 08:31 PM |
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plug wet?
Gallery updated 11/01/2011
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dilley
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| posted on 7/3/07 at 08:33 PM |
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is the float chamber filling up?
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locoboy
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| posted on 7/3/07 at 08:36 PM |
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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?
ATB
Locoboy
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dilley
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| posted on 7/3/07 at 08:39 PM |
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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.
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RichardK
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| posted on 7/3/07 at 08:40 PM |
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Maybe just try tapping gently around the float chamber just in case it just got stuck a little.
Gallery updated 11/01/2011
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smart51
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| posted on 7/3/07 at 08:47 PM |
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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.
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locoboy
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| posted on 7/3/07 at 09:52 PM |
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ok chaps,
Will give it a go tomorrow evening.
Thanks
ATB
Locoboy
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Hellfire
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| posted on 7/3/07 at 09:55 PM |
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First thing I'd try is new spark plugs 
Phil
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locoboy
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| posted on 7/3/07 at 10:21 PM |
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Already tried it
ATB
Locoboy
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Hellfire
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| posted on 7/3/07 at 10:27 PM |
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Why didn't you say so then in your first post. Might have saved me looking like a twat......... 
Phil
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chockymonster
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| posted on 8/3/07 at 12:02 AM |
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quote:
Originally posted by Hellfire
Why didn't you say so then in your first post. Might have saved me looking like a twat.........
Phil
Pah, impossible
PLEASE NOTE - Responses on Forum Threads may contain Sarcasm and may not be suitable for the hard of Thinking.
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G.Man
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| posted on 8/3/07 at 06:40 AM |
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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
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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Paul TigerB6
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| posted on 8/3/07 at 06:41 AM |
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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]
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dilley
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| posted on 8/3/07 at 07:41 AM |
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quote:
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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amalyos
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| posted on 8/3/07 at 09:43 PM |
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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!!
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locoboy
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| posted on 9/3/07 at 07:34 AM |
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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 
ATB
Locoboy
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locoboy
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| posted on 20/3/07 at 09:42 PM |
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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
ATB
Locoboy
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Paul TigerB6
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| posted on 20/3/07 at 09:48 PM |
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Have you tried removing the jets and maybe swapping a couple of them over?? Sounds like you have a blockage (ooo err) somewhere.
Paul
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G.Man
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| posted on 20/3/07 at 10:01 PM |
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have you checked the carb diaphragm on number 2?
Is the carb slide moving up when you throttle the engine?
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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locoboy
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| posted on 20/3/07 at 10:24 PM |
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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!
ATB
Locoboy
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tks
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| posted on 20/3/07 at 10:48 PM |
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thats
deffo a blocked jet then
just take (all the 4 off in my opinion)
and give then a good clean.
TKs
The above comments are always meant to be from the above persons perspective.
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G.Man
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| posted on 20/3/07 at 10:52 PM |
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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
Opinions are like backsides..
Everyone has one, nobody wants to hear it and only other peoples stink!
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