Defeated

[quacker_boy]

Well, i give up, i'm a failure!

I've checked everything there is to check and ultimately she still doesn't breathe.

To save time here's what i've already checked

- Spark
- Fuel getting into cylinder (plugs have been wet each time i took them out)
- Carbs (stripped and rebuilt to clean out jets; carbs have been overflowing from the intake mouth and been told it's the float valve, that'll be sorted out)
- Gaskets; as far as i can remember every gasket went back on
- I've run the battery flat from turning it over and still no joy

It's firing away quite happily with the battery turning her over but just doesn't want to run under her own steam and she's SO close to catching.

PLEASE HELP!

I don't want to betray DIYers and take her to a GARAGE *DUN DUN DUHHHHHH*

Chris
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[Robby]

Aha.

Hook it up to a big battery and keep it trying to catch for longer.

Also, just to piss you off, choke, killswitch?

[quacker_boy]

Done that already, had it turning it over for about 5 mins constantly 5 second break for about an hour!

And YES I'VE HELD THE BLOODY CHOKE IN PLACE WITH MY HAND DAMMIT!!!!!! AND THE ENGINE WON'T EVEN TURN OVER WITHOUT THE KILLSWITCH ON!!!!

The bike's a Bandit 250 for those who don't know
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[phantomtek]

Checked the air filter?

Could be knackered.

[Robby]

Do you have fat blue sparks, and is the air filter clean?

If yes, strip those tiny carbs again.

[quacker_boy]

I've taken the air box off for now for easy access to the carbs so it can't be that.

As for fat blue sparks, i don't know what your average sparks should look like but they're definitley bright blue...might get new plugs anyway cuz everytime i've taken the plugs out they've been soaked in un burnt petrol...
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[Ichy]

Don't know the history but have you messed with the timing or the cams? Check the TDC marks against the piston position.
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[Nath]

Spray a load of Easystart through the carb inlets.

Though if it fires when being turned over by the startermotor but won't run, then it does sound like there's something wrong with the valve or ignition timing.
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Hard livin', hard luck.

[NSR Mick]

[stinkwheel]

[quacker_boy]

Cheers for all the replies guys.

Me old man came home late today but bought home four new sparkies; so the plan is to sort out the over flowing carbs and give it a shot again.

I timed up the engine flawlessly putting it all back together, i know it's all in the right place and the cylinders are all firing when they should be.

Cheers

Chris

P.S Stink is the airbox that essential? I thought all it did was clean the air going into the carbs...
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[NSR Mick]

It should at least fire up with no airbox, probably wouldnt ride toowell though.
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If you dont like the way that I ride.......Stop trying to keep up!!!

[Cog Head]

have you tryed bump starting it ?

dont know why but that came to mind, hope it helps
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Rieju RS2 50cc MATRIX Race Replica - Cagiva Mito 125 - VFR400 NC30
LukeVFR: Cog Head is a Karma whore
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[stinkwheel]

[phantomtek]

[tonyyzf]

The more modern a bike is the more important the airbox is, its design is very much part of the way your engine runs.

And I would also check your ignition timing too

[Harold_Shand]

Take it to a garage. It's great. You put it in, it comes out fixed

DIY for anything other absolute basics is over rated.

I want to be riding it, not spending my fucking bank holiday fucking weekend pissing about with stuff I don't know fuck all about when everyone else is eating easter eggs and enjoying themselves.

I speak from experience.

I thankyou.
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BCF's 6th favourite poster 2009-2010

Harold_Shand's theory might be the best explanation.

[quacker_boy]

@ Harold: That's no fun, i'm doing a vehicle maintenance and engineering course and i'll feel like a failure if i take it to a garage

@ Stink: Sorted out the float valve so the carbs stopped overflowing so that's not the problem.

I told a fib when i said the ignition was fine, by that i meant all the plugs are sparking, you or your old man got any ideas how to check the spark timing on a CDI bike?

C'mon guys it's so close i just want to get the bloody thing back on the road now! It deserves it!
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[stinkwheel]

[NSR Mick]

I'd double check the you've got the plug leads on in the right order. Although on a lot of 4 cylinder bikes it's not that big an issue as a lot of them operate using only 2 coils therefore they use the wasted spark system firing every time the piston is at tdc (or there abouts)
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If you dont like the way that I ride.......Stop trying to keep up!!!

[Nath]

As stinkwheel said, swap the wires going from the CDI to the coils. If you currently have them the wrong way round the bike will jump into life. alternatively if the HT leads are long enough, connect the leads from 1 and 4 to 2 and 3, and vice versa.

If the bike is getting fuel and is sparking, then you've got to look at the engine. As has been said, check that when the pistons are meant to be at TDC that they really are by looking down through the spark plug holes with a torch, if you can get at them. Double check the valve clearances - The valves may have bedded in whilst you've been turning the engine over resulting in no clearance and the valves not being able to close.
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Hard livin', hard luck.

[bidman]

Hi, I starting to think its more of a fuel problem myself. If the plugs are coming out soaked each time, then to me that screams too much is going in.
On a cold engine just the right amount of petrol has to be present in the cylinders for it to spark any more it will flood any less nothing will happen. Once your engine is hot it is less of an issue but from a cold start its vital. Its like going to start your bike in the morning with the throttle open, no chance, or trying to start some bikes with no choke in the morning, no chance.

Firstly I would sort out the overflowing carbs. Then dry the cylinders out by turning the engine over with no plugs in. Then put the carbs back on and turn the idle screw right back so it should really be getting no fuel, then while the engine is turning over slowly screw the idle screw in until you get 1 or two fires, on any cylinder, doesn't matter which if one fires thats enough, you may even find it starts up like this. If not now is the time to start playing with the choke, a little smidge of choke and it should fire into life.

Hope this helps, Dan
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Don't ride it, RAG IT!!

[quacker_boy]

@ Bidman: I sorted out the fuel overflow problem look at my last post and the lines directed to Stink.

@ Stink: Each two cylinders has a coil hence i've got two coils and two leads coming from out of those coils. The thing making me think it's nigh on impossible for them to be in the wrong order is because of the length of the leads themselves. Each lead; from the coil, is long enough to reach a certain cylinder. Hope this helps.
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.

[stinkwheel]

Well don't try it then. No skin off my nose.

I was working on the assumption that you have been buggering about with the engine in a fairly in-depth manner and might have put one of the wires back in the wrong place.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[quacker_boy]

Fair play stink, thanks to all of you for helping though, guess there really is nothing for it but to book it into the garage...
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wizzzard wrote: Imagine God just stopping by, tidying your front room up and then quietly letting himself out again. Statisticly more likely to happen than Korn being on here.