Wasp Smallframe with Polini cylinder over 20HP
Today our customer John was again with his Vespa Smallframe on our Scooter Center Test bench.
More power for the Vespa
During his last visit, he asked us what changes he could still make to his engine in order to find a little more power.
After we had briefly discussed what its current setup looks like, we were actually able to give some pointers through which more top performance can be obtained.
Motor setup
Basically, the engine is equipped with a Polini Evo cylinder, a 54 bgm crankshaft. The 30th Mikuni TMX carburetor is attached to an MRP suction device. The very best prerequisites to become a clear Ü20 unit.
With an additional processing of the outlet and the conversion of the Polini membrane to 2 flaps, the following result comes out:
With Kytronic even better
Due to the larger outlet area, the exhaust can work much better. The small loss at 6500rpm is unfortunately due to the missing Kytronic. In the current state (red curve), a standard PK ignition system provides a ZZP of 18 ° before TDC. their service. With the Kytronic it is certainly possible to shift the red curve back to the left at 200 rpm, in the direction of the performance that starts earlier.
But all in all a nice number - have fun with it on the street!
(AS)