Basically, you set the belt tension first; again, no special tools required. Just measure the deflection in the lower belt guard window, 0.5 to 0.75 inches of deflection.
I had to find the belt guard window behind the exhaust first ... but I didn't get it yet. You mean to measure the deflection just by loose hanging or what? Actually, acc. to the small manual with the bike, the belt is to deflected by the defined side load with the tool (10 lbs)? I'm puzzled...
The laser tool is a good hint, thank you!
However I'd like to jump a bit further and try to get a tool for other tasks as well? My son owns a YZF-R125 with chain drive... a magnetic fixture could help there as well as it holds to the sprocket as well? I'm just not sure how to fix that one to the T-Bird's pulley...
Maybe purchase a simple laser tool and machine my one universal fixture? Actually this shouldn't be a big deal, the only thing you have to do properly is the exact alignment of the laser beam with a defined plain on the fixture...?
Any recommendations on that..?