FZRSupport: the FZROnline Archive

I got my VR in today and I remember reading on here where someone used a heat sync from a processor to help cool the VR. And some other people have used alum foil on the back. So my question is how bad do you guys think I need to have more cooling with the yzf upgrade. Here are the couple of ways I thought about doing it.

In this picture I put the fan on top of the VR. My question is; How hot does the VR get? Is there a risk of the VR melting the fan? And I would be putting the fan to where it blows onto the VR.

Second option is with the fan behind the VR and behind the bracket that the VR mounts to on the fairing (use your imagination)

Third option is to actually use the heat sync, but I don't think this whole contraption will fit in the fairing. I could cut off the fins and use the base plate since it is made out of alum.

Just wanted to know if anyone had used this before or is anyone had to throw me. Also the fan is 12 volt and I would need a good place to tap into the wiring. I'm thinking the tail light. That runs on that side of the bike correct.

Thanks in advance.

Chris.

wow man you're taking it to a new level, I'm curious to see what our guru's think of your ideas

any extra would be better than nothing. i dont know how much of a issue the yzf vrs have with heat. i was having a hard time finding a location to mount mine with the yzf600 wire harness ended up putting it onthe inside of the frame above the engine so i guess ill find out if i need some extra. i like the fan idea best i was thinking about that myself

oh man, I gotta show you how mines setup.

Neat, but complete overkill.

Just run the ground wire all the way back to the main chassis ground buss( upper rear engine case bolt), and use dielectric grease on all the terminals and the heat will take care of itself.

As long as the VR has a great ground path, the heat won't concentrate in the VR itself as much. Run the high beams in daytime, add an accessory or two..........

That use that same design VR on the newer R6s, IIRC. That design doesn't seem to have any issues since it has proper heatsink fins built in.

Thanks for the replies, I haven't been able to ride since last sat, so I think I will just mount it tonight so I can ride til winter, since it will be colder I shouldn't have a problem with heat anyway, and while I have it torn apart during the worst part of winter I will consider the fans.

Reelrazor, where does the stock vr ground to? I was going to just see if the plug would fit into the new vr but if not I will splice and whatnot and run the ground all the way to the main chassis ground buss.

Chris.

Sooo.. just got the new VR on and had a scare, I was only showing 9 volts, and then I decided to put the jumpers on the bike from my tracker and let the alt get the battery charged a little, now I am showing 13.78 continously, so I am going to take if for a test ride. The other scare was that the vr I put in had the exact same part number as the one I just took off. So unless the fzr 95's and the yzf I got this vr off of have the same part number vr then someone has previously changed the vr. The plug fit right into the vr.

So my last question is to reelrazor again (or anyone really). The ground that I need to take to the chassis, is that the black wire coming off of the plug or the extra wire that I had that was screwed onto the upper bolt holding the vr in place. Thanks.

Chris.

kilika2 wrote:So my last question is to reelrazor again (or anyone really). The ground that I need to take to the chassis, is that the black wire coming off of the plug or the extra wire that I had that was screwed onto the upper bolt holding the vr in place. Thanks.

Chris.

You found out that there is a threshold voltage that the 'modern' style VRs have...if the battery isn't showing at least 10.2Vdc or so.....it won't switch to charge the battery-this is to prevent the VR from throwing 15amps at what it thinks is a shorted battery/battery with a dead cell(which can lead to the battery exploding).


That late model FZRs came with the same VR as the YZFs. The short wire that goes to the mounting bolt? That is the one you should extend and run (12ga alll the way) to the main chassis buss.

EVERY metal to metal interface between the VR and the engine case (major ground and THE ground system for the stator AND the battery - lead) becomes a point of resistance. Dissimilar metals compound this issue(electrolytic corrosion). As is you have a steel bolt thru pot metal VR housing and aluminum plate, bolted with steel bolts to the subframe and then the aluminum engine case is bolted into a steel (or aluminum for the 400) with steel bolts and alloy spacers...alll with some kind of anti-corrosion finish (paint on frame/subframe/engine, parkerizing/zinc plating on the bolts etc.)

Goop up the stator plug, the VR connector block, and the hoop you put on the black wire to the engine case with dielectric grease (get it in the trailer section of any auto parts store-the tiny tube in 'sealants' section is like $4.95....the biiig tube in 'trailers' is like $2 ) Use it on ALL electrical stuff you disconnect or service, it'll pay in the long run.

heres my setup (you can kinda see the VR's fins under the fuses)


been going a yar strong with this setup.

Thanks, reelrazor, I had bought some earlier when I had seen you tell someone else to do that. I gooped the crap outta the space between the male and female plug, then while I was at it I decided to good the crap outta the back side of the male plug where the wires go into the male plug, thought a little water protection wouldn't hurt. But I will have to go back and trace where that bolted ground goes and good that ground.

Shred... 3 questions, What year is your bike? Your battery is seated back wards of mine, not a big deal. What are all your fuses doing? I only have 1 30 amp. And, I forgot the third question, So how is Florida?

Chris.

1. 89' fzr600 (93' motor)
2. FZR's have five fuses... One is separate and its a 25amp (you can use 30) and thats the ignition fuse.
The other fuses are for things like
*guage lights
*Headlights
*fuel pump?
*turn signals

3. HOT

kilika2 wrote:I got my VR in today and I remember reading on here where someone used a heat sync from a processor to help cool the VR. And some other people have used alum foil on the back. So my question is how bad do you guys think I need to have more cooling with the yzf upgrade. Here are the couple of ways I thought about doing it.

In this picture I put the fan on top of the VR. My question is; How hot does the VR get? Is there a risk of the VR melting the fan? And I would be putting the fan to where it blows onto the VR.

Second option is with the fan behind the VR and behind the bracket that the VR mounts to on the fairing (use your imagination)

Third option is to actually use the heat sync, but I don't think this whole contraption will fit in the fairing. I could cut off the fins and use the base plate since it is made out of alum.

Just wanted to know if anyone had used this before or is anyone had to throw me. Also the fan is 12 volt and I would need a good place to tap into the wiring. I'm thinking the tail light. That runs on that side of the bike correct.

Thanks in advance.

Chris.

Chris,
SERIOUSLY OVERKILL.
If you are paranoid then you can do as I did (see paranoid freeks yahoo group ) or
http://www.saltmine.org.uk/fzr/vr.html
Please read it carefully as there is a GOTCHA if you are not paying attention












Paranoid freaks yahoo group

Thanks for the link George, I wasn't so much paranoid, but since the vr that I had on the bike was one that was from an r6, I was worried that mine went bad from overheating, and therefore the new one would follow suit. I suppose that it is possible that the one that I had was just bad. So I thought, "Hey, I have a dead computer here at the house I'll just use that alum and the fan, so I just wondered what everyone else thought. I did notice that at idle my headlights were pulsing a little so I think I will take reelrazors advice and ground all the way to the engine. I just have to find that bolt. Should be easy enough.

Also, wish my bike was as clean as the one in the picture.

Chris.