Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Why not use the the regulator from a CB250/350K? It does the same as the Zener on Triumphs but probably a more elegant solution and and acts as a current dump to prevent 'Boiling the battery' as Bryan points in his post. It's a potted unit in an aluminium can with two M6 mount screws.The Triumph had a heatsink and was mounted between forks for air cooling as I remember. I can dig out the circuit diagram tonight if you wish on how to connect the Honda unit, it's 3 wire (Zener is two wire). I have the Genuine Honda Shop manual (paper copy) from 1969 for the CB250/350K0 and it gives a good description on how the single-phase Honda alternator/battery/lighting charge circuit works.The regulator was made by Hitachi. Thinks its RS-21 model.Its like This (Any year UK CB250K is the same): -http://www.ebay.com/itm/Honda-70-73-SL350-CL350-CB350-Voltage-Regulator-RS21-/160451265108 Cheers .. AshD
Quote from: AshimotoK0 on March 03, 2014, 08:04:48 AMWhy not use the the regulator from a CB250/350K? It does the same as the Zener on Triumphs but probably a more elegant solution and and acts as a current dump to prevent 'Boiling the battery' as Bryan points in his post. It's a potted unit in an aluminium can with two M6 mount screws.The Triumph had a heatsink and was mounted between forks for air cooling as I remember. I can dig out the circuit diagram tonight if you wish on how to connect the Honda unit, it's 3 wire (Zener is two wire). I have the Genuine Honda Shop manual (paper copy) from 1969 for the CB250/350K0 and it gives a good description on how the single-phase Honda alternator/battery/lighting charge circuit works.The regulator was made by Hitachi. Thinks its RS-21 model.Its like This (Any year UK CB250K is the same): -http://www.ebay.com/itm/Honda-70-73-SL350-CL350-CB350-Voltage-Regulator-RS21-/160451265108 Cheers .. AshDChecked the '69 250/350 manual.There are six windings on the field coil of the single phase alternator. Two are connected in a series arrangement used for daytime charging and after full wave rectification the +v side is fed into the regulator. Please see:. http://www.globalmoto.com.br/imageseletrica/honda-cb250-cb350.jpgAlso looking at this seems the '66 CB450 twin 'Black Bomber' did not have this type of regulator but gained one in '68http://www.hondatwins.net/forums/57-electrical-discussion/5976-1966-cb450-ko-wiring-problem.htmlCheers.... AshD
Quote from: Mjc477 on February 19, 2014, 09:47:22 PMHi guys just a quick one. Does anyone know if a 72 500/4 rectifier 5 wire will work ok on a 72 cb450 twinThanks in advanceSorry i dont know but if it doesnt sell me the rectifier cos i need one
Hi guys just a quick one. Does anyone know if a 72 500/4 rectifier 5 wire will work ok on a 72 cb450 twinThanks in advance