OK for racing!
Stage 6 (Germany) has released this excellent upgrade for mild to hard tuned scooters 50cc and up. This suits many vertical Yamaha and clone 2 stroke 50cc - 80cc engines and features increased internal diameter and a high flowing performance reed block for max cylinder filling and excellent response on all engines.
The rubber carb mount suits the big carbs including PWK, FCR, TM/TMX, Dell'Orto VHST etc and other big carburetors. The other included manifold suits smaller Dell'Ortos etc including PHVA, PHBG and Arreche.
To suit the below Yamaha models with 50cc or 80cc vertical cylinder engines:
BW'S 50 (3AA chassis), all
Gear (4KN1 to 4KNC)
Jog 2EX/2JA/2TA/2TE, Champ, Champ RS (2NA, 2FX, 3NH1 chassis)
Jog Sports (3CP1)
Champ CX (3FC1 chassis)
Note this kit includes two manifolds in order to fit pretty much all modern performance carbs (or even OEM ones). It also uses a Yamaha / Minarelli horizontal type reed block so there are plenty of other high performance alternatives for this too.