cb125 coil probs

[wbks]

with a 12v batt running on total loss with a 6v coil after 5 mins up the road a puff of smoke lets off and something liquid like is sizzling and bubling away then drips down onto the head in a white wax. The coil is quite hot too. Anyone know what I'm doing wrong?

[TZ350]

What you did wrong is run 12volts through a 6volt coil and burn't it out. You now need to buy a new 12v coil. Good Bosch ones can be had from Repco. Check wether your new coil needs a ballist resistor if it does you will nead to get one of those too. Coils that don't need ballist resistors would probably be better for your application.

[wbks]

How do I know if it needs a ballist resistor? and why would it have a 6v coil... I've never seen a 6v battery. is there any advantage or disadvantage into putting a 12v coil and battery in it?

[F5 Dave]

... I've never seen a 6v battery. :rolleyes:
That's because you're a teenager right? Most old small bikes were 6 volt. Even VW cars of the type you might have seen in movies like Herbie does dalas or whatever were 6V. So you knew it was 6v & you just decided not to believe it? Maybe they didn't know what they were talking about when they wrote 6v on the side of it. :Pokey:

[wbks]

I didn't bother looking and assumed that it was a 12 volt. So would putting a 12v coil with the 12v battery on it be fine or would it mess something else up or what?

[F5 Dave]

If you buy a Ripco coil it will be enormous, but it will state if it required a ballast resistor or not.

[Sully60]

:rolleyes:
That's because you're a teenager right? Most old small bikes were 6 volt. Even VW cars of the type you might have seen in movies like Herbie does dalas or whatever were 6V. So you knew it was 6v & you just decided not to believe it? Maybe they didn't know what they were talking about when they wrote 6v on the side of it. :Pokey:

Now now Dave take it easy on the poor wee fella. Some of that era Honda's ran 12V charging systems and 6V ignition systems ala CB125T, so not the hardest mistake to make. I'd hazzard to guess the ballast resistor has been removed from the system at some stage earlier by someone who thought they knew better.

[wbks]

Theres a "universal coil" 12 volt from whiteline for $80 I could get. Think that'd work fine? ... But like I asked after f5dave decided to give me shit (<3 :) ), would putting a 12 coil wreck anything else on the bike?

[Sully60]

Theres a "universal coil" 12 volt from whiteline for $80 I could get. Think that'd work fine? ... But like I asked after f5dave decided to give me shit (<3 :) ), would putting a 12 coil wreck anything else on the bike?

You can use the 12v coil and the bike will go a little better. The points won't last very long though.

[wbks]

fuck. what a hassle this is. I knew it would be more complicated then just chucking a battery and go....

[speedpro]

with a 12v batt running on total loss with a 6v coil after 5 mins up the road a puff of smoke lets off and something liquid like is sizzling and bubling away then drips down onto the head in a white wax. The coil is quite hot too. Anyone know what I'm doing wrong?

breathing . . .

[wbks]

10 characters remaining

[piston broke]

lmfao,
mate you're not the only one.:doh:
i just did the same to my a100,or something.
i shoulda known better tho as i've had several 6v bikes.
bugger eh.

[speedpro]

I ran 12v coils on a really high revving CB360 I owned but ran 18v into them to get the voltage high enough for the bike to run. One day I left the ignition turned on after I stopped it - same result as post #1. Didn't really matter though as it had dropped a sleeve as well.

[bucketracer]

WBKS

Welcome to Buckets where we get to make all the mistakes the wide boys can't afford too. And we get to race at the limit, cool fun.

[wbks]

Cool. Shall I go and run it on premix then

[k14]

Yeah def, 30:1...

Go to the wreckers tomorrow morning and ask him if he has a 12v coil that will fit the mount on your CB. Then wire it up and you should be good to go. Shouldn't cost more than $20.

[Ixion]

BTW , coils (non CDI type) are universal. Car, bike alla sama. SO a car wrecker might be a lot cheaper.

EDIT: Make quite sure the wrecker guy realises it's for a points ignition system. Not electronic anything. Or he'll sell you either a coil for a 12v CDI system , or one for one of those transistor assisted things. Which won't work.

[Ixion]

Yeah def, 30:1...

..

I'm tempted to say, disconnect the oil pump and use premix. But I'm a bit scared he might!

[wbks]

Hey are points cheap to buy? Kind of desposable?

[speedpro]

actually coils for transistor assisted systems work on the same principal so may be used as well. Just be careful of the resistance as they may be quite low resistance and use the electronics of the ignition amplifier to do the current limiting. Points may burn up pretty quick if the battery can supply the current the coil will allow. you can use a twin outlet coil as well. all you need to do is either bolt one output wire direct to the frame or put a spark plug in the cap and bolt the plug to the frame. Been there, done that, it works, though some electromic systems don't like it because of reduced impedance.

[wbks]

I'm tempted to say, disconnect the oil pump and use premix. But I'm a bit scared he might!EASEEEY ya bastard!:bash: I may be retarded about electrics but that is only because I haven't dealt with it before. I'm actually a good wrench. Just topped up my headlight fluid and put a new powerband on it. Now you tell me I don't know my way around a bike!:angry2:

[Sully60]

I'm actually a good wrench. Just topped up my headlight fluid and put a new powerband on it. Now you tell me I don't know my way around a bike!:angry2:

You can't be that good, you've forgotten the compression powder man!:rolleyes: