If a crankshaft with a longer stroke is used, this additional stroke has to be compensated for for two reasons. On the one hand due to the mechanical conditions to prevent the piston from hitting or the engine runs too highly compressed, on the other hand to keep the control angle of the cylinder, which determines the performance, within a reasonable range. If the stroke is extended, the control angles are also extended. This means that the flushing channels in the cylinder (overflow and exhaust channel) are open longer. On the one hand, this is very good for generating more power, but on the other hand it can also backfire if the control angle is no longer within a reasonable range or the remaining components no longer support the achievable speed. The control angles change most when the additional stroke is compensated for at the cylinder base. With a stroke increase from 52mm to 55mm, i.e. 3mm, 1,5mm would have to be placed under the foot OR head. So no 3mm compensating seal is used but only 1,5mm because the piston moves 1,5mm up AND down. If 1,5mm is placed under the foot, the overcurrent time increases disproportionately to the outlet angle due to the angular function of the crank drive. Both angles, overflow and outlet angle, should always be in relation to one another for a well-functioning flushing system. The outlet duct should always open for a certain time before the overflow ducts ...
- bgm - item number: 7673945
- Availability: in stock (Please check availability here in Scooter Center Shop)
- Weight: approx. 0,02 kg
- Category: Engine> cylinder> spacer
Other customers who were interested in Spacer cylinder base -BGM ORIGINAL Malossi 210 / Polini 207, Polini 210, Polini 221 / Pinasco 213, Pinasco 225 / Original 200- Vespa PX200, COSA200, Rally200 - 1.5mm (without cutouts for Überstromka…) were looking also after: Spacer | Cylinder base | Distance seal | Distance | Cylinder spacer | Head spacer | Foot spacer | Cylinder | Base | Cale D'Embase De Cylindre | Spacer Base Del Cilindro | Spacer Pié Del Cilindro |
