New Alternator - which way round ?

Previously mike_haworth wrote:

The bike in question is a 1959 Model 50. I have convereted it to 12V by buying, from Paul Goff, a 2 wire 200W alternator part no. ALT200L, which I believe to be an RM27. This replaces the 6V alternator (RM15 or RM19). In the manual it states "The stator is capable of being fitted into the spigot recess either way round, but will only operate satisfactorily in one position. It is correctly fitted when the edge from which the cables emerge is innermost".

With the replacement alternator this guidance appears to be entirely wrong !To mount it in that way would place the cables dangerously close to the primary chain ! I am assuming that the replacement alternator is of a revised design and that the cables should emerge outermost. In this position they would be safe and easily routed out through the rear of the chain case. Can anyone confirm this before I fit it ?

I also believe that I need to ensure an 0.008" gap between stator and rotor - yes ?

Mike Haworth

Many thanks for this valuable input. I wish I had asked the question first time round. My last attempt at this resulted in the stator being destroyed - £200 down the pan !!

Mike

Previously robert_tuck wrote:

The cable needs to be on the outside to avoid the chain and it will probably be squashed by the cover. You will likely also need some spacers for the new rotor (the orriginal won't fit). You will also need the services of a machine shop to make you some new stepped studs as the orriginals will probably allow the stator too much slack.Have not found anyone who stocks these. The new rotor nut securing washer will also likely be too big also ,so don't throw away the old one. You will likely need a soldering iron as the leads may be too short.allow One lead to be shorter/longer to facilitate feeding the bullets thro the grommet Good to be able to buy spares that fit !!.

Many thanks for this valuable input. I wish I had asked the question first time round. My last attempt at this resulted in the stator being destroyed - £200 down the pan !!

Mike

Many thanks for this valuable input. I just wish I'd asked the question first time round. My first attempt resulted in the new stator being destroyed - £200 down the pan !!

Mike

Alas, not just the cable. There has been massive interference between the stator and the rotor resulting in damage to both. The encapsulation material had melted.