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  #1  
Old 11-04-2006, 07:43 PM
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Default Weak or no spark on bandit

My bandit doesnt have a spark, or has a VERY WEAK spark on any of the cylenders. Ive changed the coils and leads and plugs and caps and it still isnt working, however the other day it did the same thing and then suddenly fired up and ran fine for ages, and then today its doing it again which is when i swaped out the coils and it still doing it.

Anyone got any ideas?
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Old 11-04-2006, 07:48 PM
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Try taking the right hand front engine cover off, the ignition advancer behind it is held on by one bolt, if this has backed off a bit you would have these symptoms.I speak from bitter experience.Good luck.
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Old 11-04-2006, 07:57 PM
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Is it defintly the right hand side cover on the bandit 400 and before I head to the garage, will undoing this cover piss oil out everywhere?
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Old 11-04-2006, 08:14 PM
Spondonchris Spondonchris is offline
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Ah i thought it was a 1200.Yes its the right hand front cover, the small one on the 1200 its held on with half a dozen allen bolts and i generally lean the bike to the left for easy access anyway but no oil leaks out from there.I presume the 400 is similar.
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Old 11-04-2006, 08:21 PM
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right then ill go and give it a try now.
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Old 11-04-2006, 08:27 PM
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My mate had a similar problem a few weeks ago with his 1200, turned out it was the ignition switch which was faulty.

Prior to finding that out he was advised to check the ICU (I think thats right, not very technical me !)
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Old 11-04-2006, 08:50 PM
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Just been to try it and you cant get covers off with oil in the engine on the 400 so cant try that tonight. Put a meter on the wires that feed the coils and im only getting about 3 - 4 volts there, but it is a regular pulse.
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Old 11-04-2006, 08:54 PM
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Was running fine at the weekend though ffs. Im getting pissed off with this bike now. Anyone want to buy a 400 bandit G reg??!!
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Old 11-04-2006, 08:59 PM
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measure the resistance of the pickup coils to make sure they ent breaking down?

wouldnt have thought it would cause an intermittant prob though?

jules
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Old 11-04-2006, 09:05 PM
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Yeah cant be the pickup coils cos as i say the pulse is perfect out of the plug cap, just not enough volts.
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Old 11-04-2006, 09:07 PM
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Does anyone on here have or know where I can get a wiring diagram for the bike? Im normaly good at electrics once I can see what is going on.

Just a thought, there is no clutch switch on my lever so it must have been dissconected at some stage, could this be anything to do with it.....
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Old 12-04-2006, 08:32 AM
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Quote:
Originally Posted by trikerdan
Was running fine at the weekend though ffs. Im getting pissed off with this bike now. Anyone want to buy a 400 bandit G reg??!!
good advert, there must be millions who want it now

try www.bikelectrix.co.uk

you can still lean your engine over to get your cover off without the oil pissing out
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Old 12-04-2006, 08:53 AM
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if its all 4 cycls must be summat common to all 4..........id be looking due to age of bike bad connetion somewhere......or an intermitent earth!!!

with lectrickery patience is a virtue .............also make sure hammer is well out of way, whenyou get even more frustrated!!!
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Old 12-04-2006, 02:56 PM
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going to go down and have a play in a minuite with the multimeter.

i am still after a wiring diagram if anyone has one they can scan in id be most gratefull.
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Old 12-04-2006, 03:46 PM
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Sound slike you should get a reliable bike. Something like a Harley maybe
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  #16  
Old 14-04-2006, 12:42 AM
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Thanks, thats really helpfull !!

No one got any ideas on this then? Ive been over the wiring, all looks sound, but still bugger all spark, but last weekend it was running sweet as a nut and all ive done since is adjust the chain tension!!

Could it be anything to do with sidestand or clutch switch wiring? How are they wired? My bike has no clutch switch on it and I cant find a trace of the wiring for it so assume its been bypassed, maybe its been bypassed by an idiot??
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Old 14-04-2006, 08:05 AM
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Question Couple of thoughts.

First thought-EEK I hate electrics.

Secondly.All four plugs means power not getting there.I'd have a poke at kill switch and take ig switch back off and clean it all up.

I guess it is turning over and you can smell petrol?

Lets have some more info!

Cheers,

Drew

Ps.Don't like harleys
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Old 14-04-2006, 08:43 AM
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I had a similar problem on my GPZ, is the rev counter dropping at all when this happens?
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Old 14-04-2006, 11:09 AM
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When the bike was running, turning it over on the starter would make the rev count flick up and down a tiny bit before it fired. Now the rev count stays still.

Switch gear has been swapped with a mates one and still has the same problem.

Engine turns over fine and there is a smell of petrol.

All other electrics on the bike work perfectly.
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  #20  
Old 14-04-2006, 11:27 AM
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Trace the wires to the CDI and check them for any corrosion, it might be that some moisture has got in and is having a party.
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  #21  
Old 14-04-2006, 11:59 AM
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There's 400 manuals/fiche here but dunno if there the right model?


manuals
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  #22  
Old 14-04-2006, 08:20 PM
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not the right model which is a pain.
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  #23  
Old 15-04-2006, 06:55 AM
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Lightbulb swop shop!

If your mate has same bike-easy street!

Stick your cdi on his,no firing-phuked!

Once had xs1100 that broke wire between ig pick ups and coils-worth checking for continuity.

Couple of sites more bandit knowledge worth a go.

http://www.oldskoolsuzuki.info/

http://www.suzukiownersclub.co.uk/default.asp
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  #24  
Old 15-04-2006, 04:51 PM
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Just been investigating it further.

If you hold the spark plug on the chassis and turn it over you dont really get anything, but if you hold the plug away from the frame, but still fairly close, you get a spark from the plug jump to the frame

The plugs are new and ive tested them on a lawnmower engine and they spark percectly.
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Old 16-04-2006, 12:30 AM
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easy way to see if its got power there is to hold onto it... if you can feel it but it dont hurt then its not right if it gives you a good belt then its ok...

well thats a bit of a redneck way of doing it i spose but did it on mine by accident when it broke down... only tingled didnt wack so somit must be up with it. normally get a belt off it

Jules
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  #26  
Old 16-04-2006, 11:25 AM
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Its ok, its running again. Took a car battery down there and jumped that up to it and vvrroomm started on the button. Bikes battery must be a bit tired and volts drop down too low for the cdi when the starter is operated and the boost charger i had on it oviously werent powerful enough beeing run off a generator.

Such a silly problem, all that messing with wiring and it was the battery all along!!

Thanks anyway for all you ideas.
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  #27  
Old 16-04-2006, 01:24 PM
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Now check yer charging circuit!
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  #28  
Old 16-04-2006, 02:50 PM
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It's not unusual for Bandits to have intermittent faults in the wiring loom. Which causes all kinds of nasties.

Can't remember the actual prices, but I do remember thinking that new looms weren't expensive. Which tends to indicate that there might be a bit of a problem with them.....
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  #29  
Old 16-04-2006, 03:19 PM
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Well its working lovely again at the moment. Had been starting and stopping it a bit, maybe just charge it up and take it for a nice long ride.

Im thinking of selling it anyway as I bought it cheapish and should make a bit on it and im selling my reliant trike and my old honda 125 so should have a nice chunk of cash to buy somthing newer and nicer.
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  #30  
Old 16-04-2006, 07:44 PM
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Default Similar woes...

I have a similar problem with mine.
So far...
New plugs, new CDI unit... It will fire when cold but then run it for a few minutes till it gets good and hot then try and fire it up again and it just wont start.

I am sure it's the pick up coils breaking down with the heat.

Anyone near Aberystwyth got some spare bandit coils I can check before I go spending loads?

Rich
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