collapse

www.dimecitycycles.com

www.cognitomoto.com

https://www.townmoto.com/collections/vanson-leathers

www.speedmotoco.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.lostapostlejewelry.com

www.sparckmoto.com

www.pistonsociety.com


Author Topic: Dohc Cb750f: possibly a valve issue  (Read 10489 times)

Offline teazer

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 9153
Re: Dohc Cb750f: possibly a valve issue
« Reply #120 on: Jul 03, 2019, 20:48:54 »
Maybe he wants to burn the thing to the ground.....  Or hopefully meant he was going to use a relay but went for short form explanation.

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #121 on: Jul 04, 2019, 20:28:14 »
The ignition module controls the work coils. Same with the last set I had. No risk of burning the bike to the ground. Iíve already got it wire up. The coils switch on when you fire the starter. Iím not an electrical engineer, nor do I care to be one. Thatís why Iím on board for simple design. Also, if it does burn to the ground weíll have all learned a valuable lesson. Iíve ran fuses and such. Honestly I feel pretty confident this time around


Sent from my iPhone using DO THE TON

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #122 on: Jul 04, 2019, 20:40:46 »
Safer to wire them through a 30A relay, that way you can turn them off when ignition is off. Easier than disconnecting every time

I did a relay bipass with the stock ignition, when it was on the bike. Honestly, if I would have ran better coils that would have been an awesome set up. These power arc coils are controlled by the ignition module. They arenít grounded. If I grounded them then there would definitely be a melt down


Sent from my iPhone using DO THE TON

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #123 on: Jul 04, 2019, 20:43:37 »
All this being said, Iím not advocating for power arc yet. I havenít had any success with the system yet. They are communicating with me, however, and Iím installing it as instructed.


Sent from my iPhone using DO THE TON

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #124 on: Jul 05, 2019, 23:56:37 »
So, after working on the bike for hours the damn thing wonít crank. Iím getting spark, and the timing is right. I spent meticulous hours on the wiring....... and all I get is the occasional backfire. Iíve got a sneaking suspicion he sent me a module for SOHC. I just know it. Iíve checked everything and re-timed the damn thing several times.
Trying not to let disappointment set in


Sent from my iPhone using DO THE TON

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #125 on: Jul 06, 2019, 00:24:49 »
If that even matters....


Sent from my iPhone using DO THE TON

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #126 on: Jul 06, 2019, 01:24:44 »
Ok, so after another try or two Gary calls me. We decided it sounded like 180 out of time. All I did was switch 1 and 4 plug wires to 2 and 3. Then 2 and 3 to 1 and 4 and it fired right up.... damnedest thing Iíve ever seen. Test ride tomorrow!!

The coils put out one hell of a spark. It audibly sounds like a taser. If all goes well, a little tuning will make this bike sing. Iím trying to keep my feet on the ground tho. Still havenít ridden it yet


Sent from my iPhone using DO THE TON

Offline pidjones

  • Posts: 1022
Re: Dohc Cb750f: possibly a valve issue
« Reply #127 on: Jul 06, 2019, 07:27:19 »
Fingers crossed for ya.
"Love 'em all.... Let God sort 'em out!"

Offline SquidHunter

  • Posts: 144
Re: Dohc Cb750f: possibly a valve issue
« Reply #128 on: Jul 06, 2019, 22:09:24 »
Just got back from my shake down run...... bike runs amazing. I only rode about 50 miles, but I had zero issues. Idle was smooth. No backfire even on deceleration. No flat spots on acceleration. At the moment Iím very pleased. Iím going to take it on a good long run tomorrow and see what happens.

On a totally separate note: I cleaned my carbs really well last time I pulled them. They sat in a heated ultrasonic for 24 hours. I havenít had any carb related issues since, but they are always around the corner. Does any have any recommendations for a professional that does carb restoration? I think next go around Iíd like to spend the extra money and have them done really nice. I know some of the press ins could probably use some attention, and the slide bores are beginning to score a bit


Sent from my iPhone using DO THE TON

Offline Pete12

  • Posts: 364
Re: Dohc Cb750f: possibly a valve issue
« Reply #129 on: Jul 07, 2019, 07:45:07 »
Great news, well done.