Duck wrote:
You can use a reg/rect from just about any bike as long as you wire it up correctly.
Most of them are basic three phase rectifier with some noise suppression. Most use zener diodes as shunt regulators to prevent overcharge of the battery.
Do a little perusal of various schemes from different vendors bikes of the same vintage. There are plenty of them on the WWW and plenty of discussion re: constructing ones own, adapting from other bikes, etc.
-Duck
If by "any" bike you mean a KZ from the same period using the same type of alternator, then I agree.
"Noise suppression" on a rectifier? That's a new one on me.
Zener diodes as a shunt regulator? These KZ's are not using Lucas-electronic-technology (an oxymoron by the way) from the 60's.
The reg/rec must be for your type of alternator. This means it has to be for a permanent-magnet alternator, or it has to be for an excited-field alternator. The one in question is most likely permanent magnet which is what most common KZ's were (but not all). It also has to be made for the right number of phases (single or triple).
He didn't list what bike the motor is from. If he's talking about a 77 650 chassis, that bike was originally wired for an excited-field alternator with seperate reg and rec. It will require some re-wiring to get a permanent-magnet alternator to work.
The rectifier portion can have two or three diodes per phase depending on the type of alternator/regulator setup the bike is using. This means it can have from 4 diodes to 9 diodes.
Zener diodes burn up when subjected to large currents. BSAs, Triumphs, etc used large Zeners as shunts but they failed miserably. SCRs have replaced them almost entirely. Zeners are still used in the detection circuit though.
Oh, and the numbers that are actually on the unit don't necessarily correspond to the Kawasaki part number for that unit. Vendors used different numbers, but sometimes they were similar. This is true on electronic ignition mudules also.
So what model is the motor from?
Post edited by: loudhvx, at: 2006/02/25 20:18