Author Topic: CR750 Race Alternator with starter motor  (Read 644 times)

Offline philward

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CR750 Race Alternator with starter motor
« on: July 17, 2022, 07:03:49 PM »
Just thought I’d post the latest modification to my CR750 Replica. When I originally built the bike, I opted for the Electrex World race alternator and Good Bits alternator cover to make it a more realistic replica and allow the fairing to be as narrow as possible without cutting a hole for the original alternator cover. However, the original race alternator mounts the stator on a plate where the starter spragg clutch and starter gear goes – so the bike was built minus the starter and was kickstart only.

This was a real pain and so on contacting Andy at Good Bits, he advised he was developing a conversion that allowed the starter gear to be retained with the race alternator by moving the stator into the race alternator cover. 2 years later he developed an alternator cover and spragg clutch adaptor. Not cheap at £230 for the cover and £90 for the spragg clutch adaptor (plus about £600 for the original race alternator). It’s all done now and works a treat.

See pictures for modded parts – hope its of interest




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Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

Offline SumpMagnet

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Re: CR750 Race Alternator with starter motor
« Reply #1 on: July 19, 2022, 06:42:09 PM »
I can see why these bits are not cheap. Looks like a very good qwuality set of parts there.

Tidy bit of design work too.

What sort of power output do you get from that alternator? Looks fairly small?

Oh...and DEFINITELY of intrest.
CB750F2 - in pieces
CB900F Hornet - the daily transport

Offline philward

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Re: CR750 Race Alternator with starter motor
« Reply #2 on: July 19, 2022, 08:51:15 PM »
This was my original post that queried the alternator output compared to the standard

http://www.sohc.co.uk/index.php/topic,27615.0.html

And Elecrex World product spec

https://www.electrexworld.co.uk/acatalog/RPK-1750-Honda-CB750-SOHC-Alternator-System.html
« Last Edit: July 19, 2022, 08:53:00 PM by philward »
Current Bikes:-
Honda CB750K2 (1975)
Honda CB500K2 (12/1972)
Honda CR750 Replica (1972)
Honda CB350K0 (1969)
Kawasaki ZZR1100D3 (1995)
Kawasaki ZZR250 (1990) Project (Going on eBay ASAP)

 

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