Currently mounted on a Regetti Rodolphi chassis (Gold Kart – Viper) and also have mounted on a BRM GPM-66 chassis. Both are current CIK reg European chassis.
This mount allows the sprocket/chain to align very close the the 3rd bearing bolt heads just without the chain touching….ever….under racing loads.
The gearbox sump plug is as close as it can be to the main chassis tube just before it touches about 1/2 half way above the tube’s radius. You can’t mount any further/lower than this, that’s why I recommend this mount based on what I know and see for myself….it is deadly accurate in it’s setup.
I have used this mount on about 25x chassis thus far, never an issue.
Sorry, this is the only photo i got with starter mounted onto the chassis.