Ich hatte mal angefragt worin denn genau die Unterschiede zu den OEM Honda Parts bestehen.
F20C/F22C TODA Heavy Duty Chain + Heavy Duty Chain Tensioner
Kette ist soweit klar, stärkere Bolzen + Laschen entfernter Grat etc.
zum Spanner, hier die Antwort 
Dear Andreas,
Thank you for your mail,
My English is not very good, then clear explanation will be difficult about
tensioner,.
F20C chain tensioner is really complicated design.
Probably HONDA designer had deeply considering to make it.
TODA S2000 chain tensioner is "Chinese medicine".
We can explain half reason, but another half come from our experience about
"why TODA chain tensioner has advantage to normal one?".
Anyway detail is company secret.
In addition Ver2 model of chain tensioner will be released soon.
Best regards
TODA RACING
Kazuhiro Hayashi