URGENT TECHIE HELP NEEDED guys..It's driving us nuts!!

[tony.mon]

Good suggestion re reg/rec, - perhaps meter it before all else.
Then I'd start with a fuel flow test.

Take a couple of lengths of 10mm ID hose, clamp them onto the fuel tap outlets, start the engine- there will be enough fuel in the carbs to start and run normally for a while.
Observe how much fuel flows out of the open end of the pipes, and make sure there's enough.

Have a look at the little vertical drain spigot underneath the fuel tap when running, make sure there isn't fuel dripping out- if so, tap diaphragm.

If not those, and it starts normally after a few seconds, then after recreating the problem carefully touch both ex pipes to see which one's hot and which one's cold- that isolates the fault to one cylinder.
Then try the coils swap over to see which one is affected.

[tattoo]

sounds just like the problem i had just after christmas....fuel tap diaphram had a pinhole in it...either change the whole tap or change the diaphram in your own...i just changed the tap tbh

[Anotherbikerbabe]

Firstly, the bike looks bloody lovely. Like the white on the belly pan.
Any-hoo, my wifes Ducati Monster S4 (sorry) started to run like a sack o' poop, particularly at higher revs and after many fears it turned out to be the regulator/rectifier heating too much and not giving the correct voltage to everything; engine, lights, dash etc. It's a real simple check, plug your optimate type thing or a volt meter and run the engine on your drive until it gets hot ( 10 mins should do it ) and if the voltage drops or is lower than 12.5 ish then it's not doing its job.
Just an idea anyway and costs nothing to check.
Good luck
Ged

IT ISN'T MY BIKE pictured hun, it is Daves that's the problem.Thank god!.lol..

[Anotherbikerbabe]

FOUND IT!!!!!!!!!!!!!!!!!!!!!! Diaphragm had a slit in it! Thank Christ for that! It was doing our heads in! Dave took the tap off and checked and sure enough,low n behold, you could see this long slit! I had messaged BH and he has a spare fuel tap and came to the rescue so thank you so much guys for the helpful advice and to all who think it is my gawgus beast in the pic, I can assure you it most definitely is not! Thank god I have a 19l tank and a newer bike! So once he gets it fitted onto his bike (30 mins ish?) I'll post up and let you know it's sorted! fingers crossed and see you all in Wales in September!! Cheers guys

[VTRDark]

it is Daves that's the problem.Thank god!.lol..

Well done on finding the problem. Nice easy one to fix as well, just not to diagnose.

(:-})

[lloydie]

Good news and a easy fix :-)

[sirch345]

Tracy, fingers crossed that is the problem. The trouble with fuel and electrical problems is the symptoms can be very similar for both.

Keep us posted

Chris.

[Anotherbikerbabe]

Yes guys, it wasn't easy to diagnose and was a process of elimination and Dave is quite confident now after he's checked almost everything else, that this is the fix! Hope so anyway..I can tell you, but in the process the bike has had probably more done to it than other other bike lol..So at least Dave sorted a lot of other things that were probably not helping anyway and changed a lot of stuff so hopefully!!

[Wicky]

Diaphragm had a slit in it!

Boots Chemists should have some - not sure if he needs a prescription....

[AMCQ46]

bugger...........just read through the post and was going to send a post to diagnose it as a fuel flow problem based on the description............but you already got there before me

glad its sorted

[Anotherbikerbabe]

bugger...........just read through the post and was going to send a post to diagnose it as a fuel flow problem based on the description............but you already got there before me The thought was there though, and that's what counts

glad its sorted

[eamonn]

Has the exhaust been changed or modified, could be excessive back pressure not allowing the engine to breathe !

[Bikerstrumpet]

Just reading through this thread and it's given me hope, as my Storm is doing exactly the same as yours!!!! It's not my breather pipes as I've ridden at high rpm with the filler cap open and problem still remained, So I was about to go down the road of re jetting the carbs (as previous owner didn't do that after cutting the exhausts down!) but I think I'll check the fuel tap/diaphragm first

[Anotherbikerbabe]

ALL SINGING all dancing FIXED..via new fuel tap and filter and Dave took it out for a spin down the dual carriageway (has to build up speed over 70) and HELL YESSSSSSSS not a blip! hooray and thank fook!

Job done no more ripped diaphragm.. He fitted it and away he went, so guess who's out next 2 days on his days off ...I'll be right behind him lol Happy days