Hi Cameron.
I fitted a Dynamotor to my Dart a few weeks ago and I used the existing pulley off the Dynamo.
The only problem I had was that the ignition warning light terminal comes out of the Dynamotor on the side rather than the end and it is exactly where the oil filler tube is located. To overcome this I had to use a slightly longer fan belt and to be safe I put a plastic sleeve around the oil filler in case it ever came into contact with the terminal.
It works perfectly charging at very low revs.
Steve.
