Erratic performance 5,000 rpm

zixxer · Post by **zixxer** » Wed Dec 17, 2008 12:24 pm

Hi Chris, I think we can rule out the pickup coil because I tinkered with the carbs a little over the weekend and the problem is the same type but much worse. I thought it might be because she was running too rich and so adjusted the air mixture screws. I set them 2.5 turns out from clockwise and the bike is driving terribly now, its the same problem as always but much worse. This makes me think I've isolated the problem to the carbs.

bikerpiker · Post by **bikerpiker** » Wed Dec 17, 2008 12:55 pm

I your desperate to get it running without too much messin about ,it might be worth buying a set of carbs from an Ebay breaker and shovin them straight on, that way you should know for sure !
I dont think there too expensive,any ive seen never go for much.

I done that with my Triumph,i bought a set and fitted em , but it turned out it wasnt the carbs, so i sold em through ebay again straight away for a small profit.

Post by **sirch345** » Thu Dec 18, 2008 2:55 pm

zixxer wrote: hiya lads, i've had the good luck to arrange to swop the carbs out of a firestorm thats running well on saturday and see if it is actually the carbs giving me trouble.

if i stick in his carbs and the bike works, i have a set sorted for 100euro from a breakers in dublin for my bike. so fingers crossed and i'll come back and let you know how she goes.

That's good news Zixxer

Make sure you balance the carbs before you road test the bike

Chris.

Wicky · Post by **Wicky** » Thu Dec 18, 2008 5:21 pm

And if it is the carbs, then do a thorough postmortem autopsy on the old pair to find out what the cause of the problem is.

zixxer · Post by **zixxer** » Fri Dec 19, 2008 7:57 pm

if it is the carbs i'm gonna tear them apart to find out what this all was.....before i send them to hell!

my only fear is its not the carbs. then what?

zixxer · Post by **zixxer** » Sat Dec 20, 2008 10:43 pm

its not the carbs

i ran today with the tank and carbs off a storm thats running great on my bike and it made no difference at all.

so swopping out looms tomorrow. nightmare lads, a pure nightmare.

Post by **sirch345** » Sat Dec 20, 2008 11:04 pm

Zixxer,
Well, I still say check out the pulse generator coil

Good luck with it all

Chris.

zixxer · Post by **zixxer** » Mon Dec 22, 2008 10:02 am

you won't believe this.

I swopped out carbs, tank, pickup coil and loom and resealed exhaust and she is still doing the very same thing.

i swopped out the entire loom off another bike and she is the very same.

today i'm doing the very last thing left and thats the stator. every single other possibility has been ruled out.

the pulse generator coil is the little black box with the magnet just inside the clutch cover isn't it? well thats been swopped out and made no odds.

Seven Of Nine Firestorm · Mon Dec 22, 2008 10:38 am

Is it possible to do a compression check on the cylinders and or take apart might be further down dammanged valves, warn cams etc

Post by **sirch345** » Mon Dec 22, 2008 10:59 am

Zixxer,

This gets stranger by the minute

I have been trying to come up with another possibility, but with all the thing's you've tried I'm running out of ideas.

I was also thinking on similar lines as Seven Of Nine Firestorm, like could it be that the valves clearances are too tight, that would explain it only happening when it's warm, but then surely it would happen all the time not intermittently. The same thing really if the valve timing was 180 degrees out, it wouldn't be an intermittent fault.

You don't think that, that repair you did to the PAIR system has started playing up again, as when you did that it seemed to be fine for a while before it came back again.

When you changed over the wiring loom did you also change over the switches

as if you didn't I'm wondering if you could have a fault from the kill button and starter button switch, either the switch itself or the wiring.

If I think of anything else I'll let you know.

The very best of luck with it all,

Chris.

PS. Yes that is right, the pulse generator coil is behind the clutch/water pump housing

zixxer · Post by **zixxer** » Tue Dec 23, 2008 9:58 am

hi lads.

i got rid of the bike. i had a major day of hassle yesterday. I brought the bike back to the guy i bought it from and demanded my money back and he took back the bike. he wasn't going for it at first, but he backed down eventually.

it had gone too far. i had the bike almost 3 months and she performed for only 2 of them as she was supposed too. i paid top dollar for a bike that was literally breaking my heart. I'm disappointed but at least its all over now.

I changed out - carbs, airbox, tank, loom, pickup coil, ecu, cdi, plugcaps, switchgear, all the electrics etc and more stuff im probably forgetting and could never find it. isn't it amazing that you can swop out so many systems off a bike and the problem stays the very same? it got the better of me in the end and one of the best mechanics i've ever met in my life and after over 70-80 hours working on the bike, never found it.

the really mad part is i'm half tempted to but another firestorm! but im afraid of them now.

thanks again for all your help lads, especially Chris and for stickin with me!

fishface · Post by **fishface** » Tue Dec 23, 2008 12:44 pm

dont be put off mate im guessing if he took the bike back after 3 months he sold it with the fault ive had mine 1yr now and still happy as a bunny with it and thats a long time for me

Pete.L · Post by **Pete.L** » Tue Dec 23, 2008 5:49 pm

Sorry you didn't get there Zixxer
I've been watching this thread with interest.
On the bright side...if you do get another one at least you'd know your way around it

Pete.l

Post by **sirch345** » Tue Dec 23, 2008 11:14 pm

I'm sorry too Zixxer you didn't get to the bottom of finding the fault, although I can fully understand your frustration after trying so many different things. I also like Pete would liked to have know what it was that was causing it.

If you did buy another one I'd be very surprised if you came up against the same problem again. Most problems we usually get to the bottom of in the end, albeit not this one. Obviously whatever you decide has to be your choice.

Do let us know what you get once you've decided

Good luck in deciding,

Chris.

zixxer · Post by **zixxer** » Thu Dec 25, 2008 10:21 pm

i'm going to go and have a look at a couple of storms this weekend lads. i've decided i love these bikes and they are the one for me. both of the two i'm going to see are 2000 models, one is black the other red. both are also fully faired. the red one has 15k miles up and hi-level micron race cans. she has race tek gold fork internals (makes me wonder why they were installed in the first place) and comes with a brand new pair of metzler racetec M3s.

the black one has 25k miles, has art race cans, and seems a well looked after machine.

there is another though, a dark horse, a Fireblade. 2000 model 929cc. very sweet bike and i'm going to have to take a look at her. i'll come back and tell you how i got on.

i hope you are all having a great christmas and all got something nice for your storms off santa.