Quantcast
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: Honda CB750K Cafe Racer project about to start with a monoshock??  (Read 10139 times)

Offline irk miller

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 9164
  • You've been mostly-dead all day.
You should have three ports on a CB750 oil tank. The third for a vent.

The oil is gravity fed, so for one bottom port, it will work, but the second port should be on top, unless you have a straw to push oil above the tank level. The third port should be at the top of the oil tank and connected to the vent on the back of the crankcase.


Offline rohalloran

  • Posts: 65
irk miller thanks for this. Yes I will have the 3 ports. This was mainly used for sizing purposes to see how it would fit.

Offline rohalloran

  • Posts: 65
Been a while since I last posted. But finally getting near the finish line. (I hope...)

I have searched the forum looking for an answer to my query but to no avail. I bought this regulator rectifier from Dave Silvers for my 1977 CB750K7.

https://www.davidsilverspares.co.uk/parts/by-part-number/partnumber_31700333RR24/

The block connection is straight forward but the other wires that go to the regulator are confusing me and the instructions that came with the part are useless!

My old regulator has 3 wires; black, white and green. But this just has one black/red wire with a split connection on it?

https://www.davidsilverspares.co.uk/graphics/parts/31700333RR24_large.jpg

Any advice on what goes where?

Thanks in advance.

Offline Sonreir

  • Moderator
  • DTT SUPPORTER
  • *
  • Posts: 11369
  • Oregon
Not seen one like that before. I suspect it's not the correct unit for your bike.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline rohalloran

  • Posts: 65
These guys know their Hondas and here it is listed under the model also:

https://www.davidsilverspares.co.uk/CB750K7-FOUR-1977/

Not seen one like that before. I suspect it's not the correct unit for your bike.

Offline Sonreir

  • Moderator
  • DTT SUPPORTER
  • *
  • Posts: 11369
  • Oregon
You should probably give them a ring and see what's up then.
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline rohalloran

  • Posts: 65
Interesting reply over on the SOHC forum

"My opinion: that is a shunt regulator and not the ideal choice for your bike. These run the alternator at 100% power 100% of the time and almost all waste excess power to ground. Not a worrying horsepower stealer, full alternator load takes maybe 1/3 horsepower from the engine. But the alternator wasn't designed for full zot all the time, and may overheat.
This type of regulator is normal on permanent magnet alternator bikes.
A field control regulator varying alternator output according to load is what it was designed for, there are several aftermarket ones available.
To use this one, the black wire from your reg/rect has to be connected to the black and white wires on the original regulator. You take those wires off the regulator and plug in the spades on the new one. If any metal shows at those connections, tape over them: the connector metal must not contact the frame or anything metal attached to the frame. The green wire from the old regulator can be left loose."

Offline rohalloran

  • Posts: 65
Been busy the last few weeks!


Cleaned and powdercoated


Wiring mess to clean up


Front end fitted


Clocks look good!


Callipers fitted!


Exhausts painted and ready for wrapping!

Just wait on the clips-ons to finish off the front end..

Offline Jimbonaut

  • DTT BOTM WINNER
  • *
  • Posts: 1950
    • Lost Apostle
Lookin' sharp!
"I'm telling you Donnie, nuthin' but nuthin' but right"