As an Royal Enfield enthusiast, I explored a feasibility of an upgraded alternator for Indian made Royal Enfields and possibly, for British made, post 1955 Royal Enfield machines including twins.
The upgraded alternator could cater for uprated Battery (12v 14 Ah), better starting/firing, brighter lighting with increased wattage, additional light such as fog light, use of siren for police/Military purpose etc.
The alternator would be of 200watts output much more than the standard "Original Equipment " alternator on Bullet being about 60w and Thunderbird being 116 w, and would be adaptable to all Indian made Royal Enfields as well as post 1955 British made machines including twins.
A specialist firm (ISO 9000 certified) from Chennai who happens to be the designer and manufacturer of the alternator currently used on Indian made Royal Enfields, manufactures and sells this product.
The contact person (ref. below) Mr. Pattabiraman is an expert in the field of I.C. Engines and associated Electrical Engineering. He is an electrical engineer with invention patent for the alternator manufactured by him with ferrite magnets in place if alnico magnets in the same dimensions and fitment. The alternator on Indian Enfields 1977 onwards is designed by him .Also, the AC/DC and the CDI & nbsp; systems on the Royal Enfields are designed by him.
Alternator information-
The 200watt rotor is of same dia of the existing one(74.2mm)and same fitment dimensions , but has "thickness " or dimension along the axis of rotation , larger by 3 mm , than the existing one .
Also, the new stator mounting are the same as existing (i.e. 111.1mm P.C.D.).The number of coils is changed , Bore of the stator is kept the same to maintain uniform and same air gap as existing .
This results in NO space problem i.e. the existing primary covers can accommodate the 200watt alternator WITHOUT any problem or WITHOUT any Modification required.
The upgraded alternator needs an upgraded rectifier, a regulator, and the wiring needs to be changed to the AC-DC wiring (already being used by Royal Enfield )
I have fitted the abovementioned alternator on a Royal Enfield Metror Minor (500cc twin) engine and it is performing well.
Please note that ,I do not have any commercial intrests /financial commitment with the manufacturer .
This info is being sent purely in the intrest of assisting for availing an useful product , to fellow enthusiasts of Royal Enfield ,and upon a request to do so by the contact person of the firm.
For any technical quarries /clarifications and detailed commercial quote they could be contacted directly at following details.
Following are the details of the Firm-
Name of the firm- Ignition Products (India) Private Limited
Contact Person- Mr. S. Pattabiraman
Address-
IGNITION PRODUCTS (INDIA) PVT LTD,
L 4 VSI ESTATE,
THIRUVANMIYUR
CHENNAI 600041
INDIA
TEL. 91 44 22542661/ 22542621
Email- pattabi22@hotmail.com
pattabi22@vsnl.com
Websites -
http://www.indiamart.com/ignitionproducts/ http://www.ignitionproducts.in/ Regards