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Post by fatherchuck53 on Apr 5, 2019 10:19:53 GMT -5
running a 1999 Yamaha R1 engine. With the extra lights and cooling fan it uses a lot of electricity. R1 are noted for burning rectifier/regulators and related wiring. Have changed over to mosfet r/r. Was wondering though if anyone has ideas/ thoughts on using two r/r in parallel two facilitate the flow and relieve some of the heat buildup in the individual r/r’s.
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Post by davej98002 on Apr 5, 2019 22:07:50 GMT -5
I don't know for sure but I think you can not bunt up two R-R's to your Stator. You may look at relocating it in the wind and maybe make a larger footprint solid Copper mounting bracket under the R-R as a heat sink. But finding some 'Dead Soft' pure copper may be a bit hard. Dead soft copper is what is used in most laptops to sink heat away from the processor. The OEM takes the MAX amps from the stator but any power not used by the engine/computer/lighting/gear is directly shorted (Shunted) to ground causing a lot of heat in the stator and where the R-R is mounted... Over the years I have replaces all old OEM R-R's with a cheap Mosfet as they work just a bit better than OEM. Lately, last 5 years, I have on most of my bikes gone to a Shindengen SH847 as this R-R clips the voltage instead of shunting it to ground like OEM. The SH847 only lets the demand power thru and the stator will run a lot cooler. But they are not cheap, $200. And there are a lot of fake Mosfet R-R's out there. My suggestion is to do some testing using www.triumphrat.net/speed-triple-forum/104504-charging-system-diagnostics-rectifier-regulator-upgrade.html
And ALWAYS, ALWAYS run the R-R's RED and BLACK wires right to the battery with longer 10 Gauge wires and a 30-40 Amp auto reset circuit breaker. Factory wires are about 16 gauge. Smaller wiring make the R-R try to push harder and that heat must go somewhere.
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Post by fatherchuck53 on Apr 9, 2019 10:09:41 GMT -5
I understand the need for proper mounting of the r&r. I’m thinking along the lines of reducing the work load on each r&r. Less work load more efficiency and also give the added benefit of redundancy, as I have heard of actual mosfet systems giving out.
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Post by davej98002 on Apr 9, 2019 14:20:14 GMT -5
I do not know of anyone adding a second R-R to a Stator charging system so I can not give a suggestion on it.
But my opinion is... It is a 100% analog system so it SHOULD be OK having two halfwave rectifiers in parallel. The outputs should also not care as the OEM R-R butts up to 12 V DC so dual 12 V DC should not matter.
I just can not say that I am 100% sure this will work.
On my Goldwing 1100 engine, when I do a trike with it I am axing the stupid weak Stator/R-R system and hanging a GM one wire Alternator on the front of the engine. It will put out 90-145 AMP's of 14.5V DC all day long. It has a built in R-R, one wire out...
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Post by davej98002 on Apr 9, 2019 14:42:34 GMT -5
The weak link of most motorcycles is the Stator. It is inside the engine and bathed in engine oil that is hot most times. But of almost all failures of Stators, the windings at the top are the ones that burn out. My thoughts are that running the engine on the low side of oil causes the top windings to not be covered as well so they run hotter. Heat is the #1 killer of electrical components.
There was a Y-tube Vid that was made by a guy that rebuilds Stators. He was using a Kawasiki 1000cc engine. He had a Stator enclosed in a clear box mostly filled with 185F engine oil and using a infrared thermometer read 210 Degs F around the windings. Then he ran it with half the oil bath and the windings were at 500+ F. So the hot oil was wicking some heat away.
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skiff
New Member
Posts: 20
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Post by skiff on Apr 21, 2019 2:03:28 GMT -5
Hi all,
I have a 2002 Yamaha FZ1 which I'm converting to a reverse trike...soon to be revealed.
Anyway the charging system is very week and limited...it's called a capacitive discharge system meaning that it regulates output voltage by draining or discharging any voltage that is not require. Horrible system, during winters here, I regularly connected the Battery Tender to keep my battery on a solid playing field...I know what you may be thinking about now. I ha to keep it trickle charging because I rode year around, and during winter months my battery would drain down just because using the heated gear would draw it down below the acceptable voltage.
Well, since I've been rebuilding my second gear issues, I decided to leave the anemic rotor stator bits off and I'm gonna install a very small, single wire GM Alternator.
The only problem with this conversion is that auto alternators typically run on 2000-8000 RPM. motorcycle engines run at up to 13k. I''m told by an FZ1 electrical guru that I'll need to gear down the drive pulley so it can generate voltage at upper end of the power band.
All aboard!
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Post by davej98002 on Apr 21, 2019 12:32:07 GMT -5
The main problem I see is where to get a 'DRY' rotating shaft to hang a pulley off of. It can be a Crankshaft or a Camshaft. Once you figure that one out then the pulley sizing is done using a bit of math. Normal cars have a large crank pulley and a small alternator pulley to over drive the Alternator between 700 RPM to 6,000 RPM. But you can get pulley sets to lower the speed for that GM alternator. Here is a Summit Racing brand 50% reduction pulley www.summitracing.com/parts/sum-g3969/overview/On my bike engine choice, 1100cc Goldwing, I have a dry shaft sticking out and its common to bolt on a small pulley to drive a 1 wire alternator. I'll then run an 8 gauge wire to my battery.
On your bikes engine, the left side has a sealed stator cover that you may be able to have a new cover machined with a press in seal that you can have a bolt on shaft machined to stick out. OK, my suggestion. I'd just make sure the factory FZ1's stator is in good order. Then I'd get a 'REAL' Shindengen SH847 Rectifier and 10 gauge wiring kit from roadstercycle.com/ . This will be a huge improvement over the weak FZ1's system. Read some of that Triumph Rat post in my post a few up from here.
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Post by Admin on Apr 22, 2019 19:04:58 GMT -5
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