poorly bandit

lynuke · L Plate Warrior Joined: 25 Nov 2007 Karma :

Hi i am new to this forum so to start off with i would like to say hi to everyone. I'm a aborn again biker and been back on the road for a couple of years riding a 600 bandit. But have very little in the way of mechanical know how. So i am after a bit of advice if anyone can help.
Last week my bike failed to start, it would turn over but not fire. I replaced the battery as the old one would not hold charge. I took tank off checked the filter in tank for gunk (it was fine). Checked tap operation and all fuel lines for blockages etc (fine). I have now replaced the plugs and the bike will start, but only on 2 cylinders 1 + 2. I am getting a spark on 3 + 4 but not firing. I thought maybe a coil gone but if so would that not cause maybe cylinders 1 + 3 not to fire as 3 + 4 on are on seperate coils? As far as i can tell all electrics work fine.

If antone got any ideas i would appreciate it. Thanks

Richard_Schmid · Scooby Slapper Joined: 01 Nov 2007 Karma :

Possibly a problem with the carberetta - Experts, what do you think?

greatmoorred · Nearly there... Joined: 13 Jul 2005 Karma :

Hi.
My 400 Bandit does something very similar when its low on juice !!
It doesnt like being on reserve and will often run on 3 when it gets that low.
Always best to start at the really easy options and work up. Very Happy

Also these connections pictured (orange and yellow ) were loose on mine, so tightened them up and wd40'd them.

Phil_P · Trackday Trickster Joined: 10 Nov 2007 Karma :

Make sure that choke linkages are both opening and closing (fully) the choke flaps on all four cylinders.
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ms51ves3 · Super Spammer Joined: 08 Jun 2007 Karma :

Are you sure it's turning over?
Could just be your starter motor spinning but the solenoid not engaging.
Have you tried bump starting?

Mark

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

ms51ves3 · Super Spammer Joined: 08 Jun 2007 Karma :

lynuke · L Plate Warrior Joined: 25 Nov 2007 Karma :

Thanks for the tips and pointers guys. I ain't gonna get a chance to look at my bike for the next couple of days, but i will let you know the out come of my tinkerings
cheers

400bandit · World Chat Champion Joined: 21 Dec 2005 Karma :

As has already been said, sounds like fuel starvation. I would wip the carbs off and give them a clean. BTW what colour were the old spark plugs you took out? I take it you are running with the standard ar box and not pod filters?

All the best, Joe
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Current Bikes 650 Honda Bros, VTR1000 Firestorm // Past Bikes: Sachs Madass 50/110cc - Bandit 400 - FZR750
(+ a XS650 in lots of pieces in my garage and other places...)

Keir · World Chat Champion Joined: 11 Apr 2006 Karma :

as others have said. i think its a fuel starvation issue.

If your getting a spark, and the air filters ok then the only other thing needed is fuel. You say you have checked the fuel tap and line so it must be further down the line. Id suspect the carbs too.

either clean them, pay to have them cleaned or just buy a working set.
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Current : '08 Yamaha FZ1s
Previous: '99 Honda CBR 600FX, 03 ZX636 B1H, 99 Fazer 600 (red), 02 GSX-R 600 K2, 00 SV650s (red), 2008 ZX10R, 97 Bandit 1200N, 04 ZX6RR K1H, 04 GSX-R 1000, 98 Fazer 600 (gold), 05 Madness 110 Pit bike, 04 CR125R, 00 SV650s (black), 06 KTM 625 SMC, 99 SRAD 600 track bike, 03 SV650, 98 Bandit 1200N, Bandit 600SY, 03 GSX-R 600 K3, 01 GSX-R 600, 01 Fazer 600 (black), VFR 400 NC30 x3, 78 Honda Dream, 00 Speedfight 50

Ichy · World Chat Champion Joined: 15 Jul 2005 Karma :

Guys if you read the original post the OP said that his bike is running on two cylinders.

Now before you start ripping your carbs to bits or buying new ones just open the drain screws and see if any fuel comes through. If it does then it means the bowls are filling up as they should. If not then there could well be a blockage in the fuel supply between carb 2 and 3. Next crank the bike over and check if the plugs are wet. If they are then the carbs are supplying fuel. If you have a compression tester just check the pressure is ok. This rules out a problem in the gasket between the two barrels.

You could swap the plugs over between the working and non working barrels and also the leads from the shared coils. This rules out any ignition problems.

if its still not running at this point then I would strip and clean the carbs.

MaybeGuy · Super Spammer Joined: 12 Mar 2007 Karma :

valve spacings
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Blue_SV650S wrote: it was a sh1te wheelie, but it proves that he can get it up in 3rd and can do angles. In summery, mattsprattuk is a gobby little sh1tebag, dopehead tw4t, but sadly for all of us, he probably isn't THAT full of sh1te!! Mr. Green

Kickstart wrote: Hi I tend to agree with Matt. All the best Keith