[Rpm90001]

Well I'm at the end of restoring a very clean 86 trx200 sx. I fired it up for the first time the other day and took it for a short ride and noticed after about 10 minutes the headlight blew, then noticed today the tail light also went out. May or may not be a problem... But have a feeling it may be an issue. Anyone else have this problem?

Here is what I tested with my DVM

Battery alone not running. 16.40v
Not running at tail light 15.93v
At tail light at idle 17.74v
At tail light revving motor 19.0v



Looks like I need to test the rectifier/regulator . The Honda manual says I have to use a certain voltage meter, I have a fluke should I be able to use it?

Ok, I got the regulator sitting on the table in front of me. Fluke is at work, but have my craftsman DVM. Accurate or not, it seems like I should get some type of readings. Following the Honda repair manual I get no reading between most all the wiring? Here is what I did. I do not have the recommended meter as called for in the manual (sawn and kowa).

Meter set at 20k ohms*
Red to yellow1. No reading
Red to yellow2 no reading
Red to green no reading
Black to green 0.54 good

Green to yellow1 no reading
Green to yellow2 no reading
Black to yellow1 no reading
Black to yellow2 no reading
Black to yellow no reading
Black to green 0.54 good
Black to red no reading

0 continuity between the 2 yellow wires is this normal?

Anyone get anything out of this?*

George

 

[Helmut]

Welcome to the forums. I'm not familiar with the test you're doing, but 16.4 volts is a lot of voltage for a battery with the engine not running. You're definitely overcharging. If all the wiring is correct, I would replace the regulator/rectifier.

 

[shadetree]

replace the reg/rec..16.4v is way to high...what i don't understand is..even if your reg/rec is bad..it shouldn't keep blowing the light bulbs..now..it would over charge your battery..and make it bubble over..spilling out all your acid..but..it shouldn't affect the light's...if your blowing light bulbs..then i would say you got a short somehwere..something is grounding out..causing your light bulbs to blow..a bad reg/rec shouldn't do this.

 

[Helmut]

replace the reg/rec..16.4v is way to high...what i don't understand is..even if your reg/rec is bad..it shouldn't keep blowing the light bulbs..now..it would over charge your battery..and make it bubble over..spilling out all your acid..but..it shouldn't affect the light's...if your blowing light bulbs..then i would say you got a short somehwere..something is grounding out..causing your light bulbs to blow..a bad reg/rec shouldn't do this.

I've seen bikes and ATVs that have the headlight that runs off the stator, and not the battery, blow the lights when they're overcharging. I've never seen that happen to one that has a battery, though. Another thing is, why is the battery voltage so high, with the engine off?

 

[shadetree]

replace the reg/rec..16.4v is way to high...what i don't understand is..even if your reg/rec is bad..it shouldn't keep blowing the light bulbs..now..it would over charge your battery..and make it bubble over..spilling out all your acid..but..it shouldn't affect the light's...if your blowing light bulbs..then i would say you got a short somehwere..something is grounding out..causing your light bulbs to blow..a bad reg/rec shouldn't do this.

I've seen bikes and ATVs that have the headlight that runs off the stator, and not the battery, blow the lights when they're overcharging. I've never seen that happen to one that has a battery, though. Another thing is, why is the battery voltage so high, with the engine off?

yeah..i've seen atv's that the front head light..and tail light run off the stator..the susuckies do that on thier old bikes....as for a battery showing high voltage.even with the bike off..no clue on that one..unless thats how much the battery already charged up too..before he done the test ?

 

[Helmut]

unless thats how much the battery already charged up too..before he done the test ?

Yeah, that's the only thing I can think of too. It must have been really charging hard to go up that high.

 

[shadetree]

unless thats how much the battery already charged up too..before he done the test ?

Yeah, that's the only thing I can think of too. It must have been really charging hard to go up that high.

i agree..and i hope it did not burn out his stator in the process..lol.

 

[Rpm90001]

changed and now everything is good! thanks!

Geo

 

[ron r]

19 volts is 50 percent more than the rating of the bulbs.
the rectifiers are for changing AC to DC, your regular is defective.

Fluke makes an excellent meter
RR

 

[tomvito]

I have the same model, and it did the same thing when the voltage regulator/rectifier went. But mine was making something like ~50+ volts running, and reving. It too blow every bulb. The voltage was just way to high for a 12VDC bulb. After 20+ years of being an industrial electrician, I can tell you most incandesent bulbs, will work up to about 15% overvoltage, for a short time, more than that they blow quick.