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rectifier, how hot does it get?

This is a discussion on rectifier, how hot does it get? within the ZX-12R forums, part of the Kawasaki Motorcycles category; I have a 01 zx12r, 30k mi. Does the rectifier get to hot to touch? Could a weak battery cause the rectifier to over heat(my ...


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Old 07-28-2011, 12:00 PM   #1
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rectifier, how hot does it get?

I have a 01 zx12r, 30k mi. Does the rectifier get to hot to touch? Could a weak battery cause the rectifier to over heat(my battery starts my bike fine, and charges up fine when on a battery tender)? My wires and stock plugs all look fine, no oil in the plug or brown overheated wires. I just recently decided to reach back and touch the rectifier, for the 1st time, after a ride and it was very hot. Should it get to hot to touch?
   
 
Old 07-28-2011, 12:39 PM   #2
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yes it gets too fucking hot.it will melt shit.replace that oem garbage with a ricks mosfet unit. 150 bucks shipped to your door.it runs way way cooler.it`s looking like the 2000 and 2001 zx12rs are having melt downs replace them now guys before you have to buy even more parts or have the bike burn to the ground......you have been warned..................
   
 
Old 07-29-2011, 07:45 AM   #3
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LOL...The Ricks spokesperson is at it again.......Bottom line if the recall on the stator wiring has been done at a proper time (less then 10k miles) then the stator and rectifier will be fine and will get warm..NOT HOT!!!.....If you buy a 12 that has not had that done and has 15-30k then the rec will get hot and be borderline warping your tail.....By all means get a Ricks unit, damage has been done.... My oldest 12 (2001)has over 80k on it and no problems at all and no ricks rec, just wiring mod.......Just got another one (2000) with 8k on it and have performed the wiring mod and no issues what so ever and expect it to go as long as the 2001......good luck on your plan of attack....Gotts catch this early guys....I know there are very little 12's out there with low miles left.....

Last edited by crashtech; 07-29-2011 at 07:48 AM.
   
 
Old 07-29-2011, 07:47 AM   #4
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any shunt type rectifier can get really hot..... the extra heat is comes when system power demands are low and the regulator needs to get rid of excess power which is does via shunting it to ground.....
I have never actually measured the temp of mine since I lapped the heatshink and installed some thermal tape but even the best case senerio its HOT. Don't think its just a ZX12R problem becuase all regulators of this type can get really hot.
If you have had a failure just buy the newer style instead :o)
   
 
Old 07-29-2011, 09:37 AM   #5
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Quote:
any shunt type rectifier can get really hot..... the extra heat is comes when system power demands are low and the regulator needs to get rid of excess power which is does via shunting it to ground.....
I have never actually measured the temp of mine since I lapped the heatshink and installed some thermal tape but even the best case senerio its HOT. Don't think its just a ZX12R problem becuase all regulators of this type can get really hot.
If you have had a failure just buy the newer style instead :o)
Thanks, I bought the bike in 07, and never had any problems with the charging system, still has the same battery. Just recently I decided to touch the rectifier and it was very hot. I thought there's a reason they install a heat sink and a lot of bikes have it at the front of the engine, in the cool air. But your description of a shunt type rectifier, regulator, brought back my limited knowledge. See if I remember this right, so at high power demands , the rectifier will actually run cooler, create less heat?

Last edited by Lobo; 07-29-2011 at 09:39 AM.
   
 
Old 07-29-2011, 09:54 AM   #6
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Quote:
Thanks, I bought the bike in 07, and never had any problems with the charging system, still has the same battery. Just recently I decided to touch the rectifier and it was very hot. I thought there's a reason they install a heat sink and a lot of bikes have it at the front of the engine, in the cool air. But your description of a shunt type rectifier, regulator, brought back my limited knowledge. See if I remember this right, so at high power demands , the rectifier will actually run cooler, create less heat?
Correct BUT again I have never done any temperature readings to see exactly how much cooler
   
 
Old 07-29-2011, 11:12 AM   #7
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Quote:
LOL...The Ricks spokesperson is at it again.......Bottom line if the recall on the stator wiring has been done at a proper time (less then 10k miles) then the stator and rectifier will be fine and will get warm..NOT HOT!!!.....If you buy a 12 that has not had that done and has 15-30k then the rec will get hot and be borderline warping your tail.....By all means get a Ricks unit, damage has been done.... My oldest 12 (2001)has over 80k on it and no problems at all and no ricks rec, just wiring mod.......Just got another one (2000) with 8k on it and have performed the wiring mod and no issues what so ever and expect it to go as long as the 2001......good luck on your plan of attack....Gotts catch this early guys....I know there are very little 12's out there with low miles left.....
bullshit.me and lots of 12r owners have gone round and round with this garbage.i have owned my 2000 12r since new.it still looks new.i repair everything back to new as needed.the recall was done with the fucking super glue by the dealer back when 1st issued.it did not work and oil kept filling the plug and dripping all over the rear left of the bike.i got the dealer to order in a new stator and i did my own modification with 3 coats of epoxy 2 step glue anywhere i thought the oil could travel up the wires.it has not leaked in 6 years.i did cut off the oem connectors under the seat and used steel barrel sleeves and soldered.the oem rectifier gave up the ghost at some point and would fry new batteries in short order.if the rectifier was in open air i don`t think we would be having these conversations.the mosfet units run way cooler.i love my bike and 150 bucks fixed that charging problem.as far as ricks electric goes i`m very happy with him and his unit.call him. i did and he told me what the best set up was.all you have to do is cut the old connectors off and solder his mosfet unit on.if your battery has`nt been staying charged i would replace it at the same time.your bike will run better and your lights will be brighter with no dimming at idle.you will gain 10 amps of head room also.
   
 
Old 07-29-2011, 11:31 AM   #8
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My headlights do not dim at idle and I have a OEM style regulator

BUT technically speaking this bike has relayed headlights so if they do dim at idle there is something wrong going on. The weather looks good for tommorrow so I will post some voltages and temps later
   
 
Old 07-29-2011, 11:51 AM   #9
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thats right.it`s called a fucked up regulator...........bingo.you win the prize.
   
 
Old 07-29-2011, 04:59 PM   #10
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I have a Rick's regulator and it gets hot. Too hot to hold my hand against. But its been on there for two years or so and its still working properly. When I first installed it and it got hot, I called Rick and he said it will get hot. So don't think the Rick's unit wont get hot. It will. It would be better if the regulator was somehow in the open air, but its something we have to deal with. Maybe it would be a good idea to cut a cooling duct in like race cars do for the front breaks...
   
 
Old 07-29-2011, 07:38 PM   #11
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is yours the mosfet unit.mine is and after riding for 2 hours on a 95 degree day i can put my fingers on it without screaming fffffffffuuuuuuuuuuccccccckkkkkkkkkk
   
 
Old 07-29-2011, 08:04 PM   #12
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Does he pay you or something??
   
 
Old 07-30-2011, 08:20 AM   #13
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Quote:
My headlights do not dim at idle and I have a OEM style regulator

BUT technically speaking this bike has relayed headlights so if they do dim at idle there is something wrong going on. The weather looks good for tommorrow so I will post some voltages and temps later
so at least in the daytime, for the regulators sake, would it be better to run with the high beams on? less power to get rid of. be seen better and might as well burn out the high beams first.
my headlights don't dim either.
   
 
Old 07-30-2011, 10:00 AM   #14
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i always try to run with the high beams on during the day.

I ALWAYS ADVERTISE AS MUCH AS I CAN FOR PEOPLE AND COMPANYS THAT TAKE CARE OF ME.I WANT THEM TO DO VERY WELL.WE SHOULD ALL DO IT ............ IF THEY WANT TO PAY ME THATS EVEN BETTER
   
 
Old 08-01-2011, 07:38 PM   #15
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Quote:
is yours the mosfet unit.mine is and after riding for 2 hours on a 95 degree day i can put my fingers on it without screaming fffffffffuuuuuuuuuuccccccckkkkkkkkkk
I don't know if its the Mosfet unit? Does he sell different units for the ZX12R?
   
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