Weak spark

[Thom]

Right, here we are again!

My new (old) gs500 e has what seems to be a very weak spark, i fitted new plugs today and it still appears weak, yet it does ignite the fuel... sometimes!

It takes a while for the spark to catch. Now it appears my battery is going as it wont hold a charge for very long at all, is it likely a new bettery would solve the problem of the wek spark or am i looking at coils and stuff?

If so what might be the answer to my problems?

I had a big backfire yesterday so im assuming theres fuel going through just not igniting.

[tutton]

Didnt think the battery controlled the spark apart from letting it spark by having enough power for it to know the ignition is armed.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[Thom]

fair do's i didnt think it would be the battery but just wanted to rule that out.

[Blau Zedong]

[tutton]

Seriously your a tosser
and take it up the gary.
and post useless shit.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[finpos]

Never try and diagnose anything electrical on a bike with a dead/flat battery. Instead of doing it's normal job (providing power in borderline situations, e.g. with an idling engine) it will instead suck up any available power stopping other things - like the sparks - working properly.

f.

[hmmmnz]

charge your battery ect and try again,
have you got a multi meter??
if you want help testing hen send me a pm and ill give you my number,
and ill talk you through everything.
i still have a spare set of gs500 coils here, that ill happily send to ya, if yours are toasted D:
____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[ZaphodBeeble]

Indeed, charge your battery.

A flat battery will absorb a lot of the charge coming from the alternator and will cause the weak spark you are getting.

EDIT: Spelling
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Current bike: VTR1000F Firestorm. Previous: Firestorm (written off) - XJ600 Divvy - NSR125 - DT125 and a load of offroaders.

[Thom]

Well im just going to buy a new battery as this one is pretty dead to be fair.

Once i've got a new battery in place i'll see how the spark is. an no i dont yet have a multimeter but its one of those tools i need to buy as well as a spark plug socket, caliper piston pliers and a blow torch

Just out of curiosity, if its not the battery is it likely to be anything expensive?

[hmmmnz]

the only other things it could be is wiring, coils, ht lead, ht caps,

____________________
the humans are dead
I kick arse for the lord
Wiring Diagrams BIDNIP it bitches

[Thom]

ah thats not too bad then

thank god for that because with replacing the chain/sprockets, rear disc and a few other bits and pieces im looking at £200+

glad she was cheap!