KZR's Bikes of the Month for 2024

650 Mod's 78 Fighter Build

  • DoctoRot
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  • Oh, the usual... I bowl, I drive around...
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28 Apr 2018 12:29 - 28 Apr 2018 12:30 #782534 by DoctoRot
Replied by DoctoRot on topic 650 Mod's 78 Fighter Build
you also need the corresponding rotor and possibly a different engine cover. I would be surprised if the Dyna S was drawing significantly more current than stock. I don't think that is your problem but upgrading your charging system is always good.
Last edit: 28 Apr 2018 12:30 by DoctoRot.

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29 Apr 2018 09:43 #782596 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
Docto:

I thought I could get away with the rotor and cover that I have? I've seen posts here before about it being a bolt in swap with the only modification being to add switched power to the rectifier. As for the draw- I was running points before so I wouldn't have had draw there. I've read into it more and talked to another member here, and found out that the single phase systems usually have issues with the Dyna S while they won't have issues with the electronic ignitions.

I just put a new reg/rec on it for the single phase system for now, and upgraded to a good AGM battery. With the AGM, I'm charging at 13.9v now which is a good improvement. Might look at upgrading to an LED headlight and tail light to reduce more draw, but I think I'll end up swapping over to the 3 phase soon enough.

Thanks for the tips!

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully

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29 Apr 2018 11:41 #782601 by Nessism
Replied by Nessism on topic 650 Mod's 78 Fighter Build
No eBay APP ID and/or Cert ID defined in Kunena configurationIf you are going 3 phase don't waste money on getting a stock R/R. Get a SH775, the real deal type. It uses new technology and will help your stator live.

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  • seanbarney41
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  • '79 kz1000 LTD '75 Honda CB750
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29 Apr 2018 21:54 #782635 by seanbarney41
Replied by seanbarney41 on topic 650 Mod's 78 Fighter Build
I have been running DynaS ignition with 3 ohm Accel coils on my 650D1 SR and have had no problems

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03 May 2018 08:34 #782765 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
Ed- is that R/R a direct swap in? Or is there some more work that has to get done with that one?

Sean- what year is your 650?

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully

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03 May 2018 18:08 #782802 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
Just took the bike for a decent shake down ride of around 25 miles. Stopped to fuel up halfway through, and had no issue starting after that stop. Charging is still up around 13.8-13.9v with the new R/R and the new AGM battery. I think I might be ok for the time being.

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully

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  • seanbarney41
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  • '79 kz1000 LTD '75 Honda CB750
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04 May 2018 23:44 #782885 by seanbarney41
Replied by seanbarney41 on topic 650 Mod's 78 Fighter Build

650mod wrote: Ed- is that R/R a direct swap in? Or is there some more work that has to get done with that one?

Sean- what year is your 650?

pretty sure D1 is 1978 model year?

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  • seanbarney41
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  • '79 kz1000 LTD '75 Honda CB750
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04 May 2018 23:46 #782886 by seanbarney41
Replied by seanbarney41 on topic 650 Mod's 78 Fighter Build
looks like this...
[img
KIMG0232 by Sean Barney , on Flickr
The following user(s) said Thank You: KZJOE900

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05 May 2018 07:28 #782906 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
Sean- seems like the D1 is the 1978 model. Maybe your R/R is just in better shape than mine was and is holding out for the time being?

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully

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  • seanbarney41
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  • '79 kz1000 LTD '75 Honda CB750
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07 May 2018 17:47 #783035 by seanbarney41
Replied by seanbarney41 on topic 650 Mod's 78 Fighter Build
yep, I was pretty sure. Don't get confused by the mish mash of parts on my bike. The charging system is all correct for 1978. The previous owner did a very good job of refreshing most everything, so there could be new or reconditioned parts. I just wanted you to know that the '78 charging system is capable of working with 3 ohm coils.

Dyna does offer 5 ohm coils which might help take some of the load off your charging system. I know that is what Honda cb550 guys need to use, as few have found the mid sized Honda charging to be capable of keeping up with 3 ohm coils.

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07 May 2018 20:25 #783049 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
Sean- I'm still running the stock coils on my bike, I forget what the Ohm rating is on them. This might also be something for me to look into. For now though, I've had the battery sitting cold (before starting) at 12.8 volts, and charging around 13.8-13.9v. I've started to look into LED headlights to reduce the draw on the charging system as well.

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully

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06 Jun 2018 07:47 - 06 Jun 2018 08:33 #784710 by 650mod
Replied by 650mod on topic 650 Mod's 78 Fighter Build
So I just installed the LED headlight on the bike, and am getting charging voltages up to 16.5 volts when the bike is running around 4,000 RPM per the service manual.

I also recently installed an AGM battery, and a new regulator.

My question here is whether or not the 16.5 volts is going to kill the battery as that's a pretty high charge

EDIT:

I just took the bike for a 4 mile shake down, and charging has shifted down to 14.0 volts over 4k RPM. I'm not sure if I've already cooked a cell in the AGM...

Standing voltage with the coils off is 12.8-12.9 volts.

78 kz 650 custom
Wiseco 720cc big bore
Dynajet stage 3 carb kit with pods
2002 Kawasaki Z750 exhaust
2001 Buell lightning front end
1999 Ninja 600 swingarm with 1999 Ninja 900 rear rim
converted to monoshock rear
Too many goodies to list fully
Last edit: 06 Jun 2018 08:33 by 650mod.

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