Originally posted by Rowdy
Modified version ( blue endbell) has considerably more bottom to mid range torque than the touring version (black endbell). Touring version is a higher rpm motor.
Hara edition is the same as touring version except with sprint brushes and possibly different springs. I don't think it has any "special winds" like some company's used to produce.
Hara, Steenari and Surikarn uses a armature with a "twisted" comm. It gives much more RPM, but the motor has less torque. This motor is only suited for tight indoors tracks, where it should be geared about 5 teeth lower than an usual motor with the same winds (between 9.5 and 7.2). It's not suited for long tracks because it gets really warm and will have the cables getting unsoldered.
The touring has more RPM than the "modified" as you said, and they usually needs to be geared down 2 or 3 teeth lower than usual motor / same winding, as the V2 endbell allows for more RPM but less torque than the classic endbells.
They're good motors, but I prefer to keep my classic ones, I found out that with CS brushes I get more runs out of my motors without skimming, and the brushes lasts more than 50 runs.
PS : my informations on the V2 comes from Oscar Jansen himself, whom I interviewed especially about that for a magazine I write for.