Help on old Z200

[Harry__]

Hello all, 

 

I’m trying to get an old Kawasaki Z200 that has been sitting in a shed for 20 years running, it had no battery so I put one in, connected the earth fine, but when the hot lead came into contact with the positive terminal of the battery for 10 secs smoke appeared and a small pop was heard, after looking the regulator-rectifier is what’s smoking and the rubber/epoxy it’s sealed it has a small cut where is blown out from the inside. I father did say he thought it was bad but couldn’t remember, what I am hoping to know is was this just because of a bad regulator-rectifier unit or is this the result of something else as I don’t want to buy a new unit for that one to blow also.

 

attached are some images of the underside of the regulator-rectifier unit where the rubber/epoxy is

 

Any help is greatly appreciated 

 

[Mickly]

Ah, yes, I think the technical term is F*cked

Use the internet to find a suitable replacement, doesn’t have to be OEM part for that actual bike, just something cheap to get it going at first so you can eliminate other issues.

[Harry__]

13 minutes ago, Mickly said:

Ah, yes, I think the technical term is F*cked

Use the internet to find a suitable replacement, doesn’t have to be OEM part for that actual bike, just something cheap to get it going at first so you can eliminate other issues.

Ok thank you for the help

[Bianco2564]

Once you have your new rectifier, before you hook up the battery, connect a multimeter with the dial on resistance, positive lead to battery positive (hot) lead and the negative probe to bike earth, if there are any other dead shorts it will show up as no resistance, buzzer will sound if you have that function on the meter. If it does, would be a case of systematically going around the bike disconnecting everything to find the culprit/s ,don't assume there may only be one fault.

BTW,  when connecting a battery, bolt the positive on first, reason is, if you connect negative first then accidentally ground a spanner when tightening the positive terminal, you'll have fireworks.

[Harry__]

On 23/12/2023 at 19:10, Bianco2564 said:

Once you have your new rectifier, before you hook up the battery, connect a multimeter with the dial on resistance, positive lead to battery positive (hot) lead and the negative probe to bike earth, if there are any other dead shorts it will show up as no resistance, buzzer will sound if you have that function on the meter. If it does, would be a case of systematically going around the bike disconnecting everything to find the culprit/s ,don't assume there may only be one fault.

BTW,  when connecting a battery, bolt the positive on first, reason is, if you connect negative first then accidentally ground a spanner when tightening the positive terminal, you'll have fireworks.

Thank you for the help, I have 2.7-3 ohms of resistance between the earth and the positive lead, is this ok? When I put the multimeter to continuity it was also beep when I do the same test

[JRH]

26 minutes ago, Harry__ said:

Thank you for the help, I have 2.7-3 ohms of resistance between the earth and the positive lead, is this ok? When I put the multimeter to continuity it was also beep when I do the same test

That doesn’t sound right. Unless you have an alarm or a clock Fitted there should be infinite resistance. A reading of 3ohms at 12volts would mean a current draw of 4 amps. 

[Guest]

I suggest you look at your alternator before you do anything else.