I’m quite surprised no one has answered this one.
With the shifter kart you can only get 60link 428 chains but correct me if I’m wrong. Obviously with gearing bigger or smaller you have to shorten the chain or use maximum length.
If a kart seat 10mm further forward or back can make a difference I’m sure a engine 10mm further forward or back can also make a difference. Maybe I answered my own question but who knows. It’s got me thinking.
Anyway I will try a 59 link chain on Saturday, it’s 59 because my engine stop was at max length.