Polini - ECM map options with valve springs
Polini has updated its ECM (Engine Control Module) for Vespa, Liberty 50 and ZIP four-stroke Euro 5 - "the replacement of the control unit is essential for any type of set-up," the company says.
Designed and tuned as a result of testing, trials and development by the Polini racing department, the upgrade of the control unit allows the choice between three different mappings, "giving riders the opportunity to personalise their vehicle even more.
"The addition of the valve springs inside the package allows the limiter to reach up to 10,000 engine rpm with a convincing and noticeable result in speed and an increase in performance that guarantees a more dynamic and fluid drive".
"The basic Map level 1 is the simplest assembly step, because you just remove the original control unit and connect the 'plug and play' easy-install Polini ECM. By replacing this part only, it allows an increase in the rpm limiter with the engine going from 7,500 to 8,100".
With this mapping, the odometer goes from 45 km/h to 50/53 km/h and Polini advise use of its variator (#241.737) and muffler (#190.0079) - but it is possible to use the factory Piaggio engine.
The next level Map 2 is a dealer install that takes the performance up a level. First of all, it is necessary to change the original engine valve springs with the Polini ones included in the control unit package - these allow the engine limiter to be taken up to 10,000 rpm without valve problems.
Polini also advises the use of its variator, muffler and its improved filter box coupling (#223.0131), but it will work with the original engine. This set-up takes the speed from 45 km/h to 56/60 km/h.
To replace the springs, it is necessary to disassemble the engine, but Polini says that the move directly up to Map level 3 - specific for Vespa and Liberty 50 - can be achieved for relatively little extra cost in relation to the improved performance.
Polini says that this is the step to achieve maximum performance. The basis of this step is the 49 mm diameter cylinder kit, which brings the engine to about 80 cc (#140.0223) - with the company's long gears (#202.1424) mandatory for an optimal result.
"Even with this mapping, it is advisable to combine the variator (#241.737), the muffler (#190.0079) and the improved filter box coupling (#223.0131).
Specific for the Euro 5 four-stroke ZIP, Map 4 also takes the maximum speed to 70/75 km/h. If the work has already been done to upgrade to Map 2 then, again, the additional cost for maximum,
The basis of this step is the 49 mm diameter cylinder kit, which brings the engine to about 80 cc (#140.0223) with the long gears (#202.1429). It is also recommended to use the variator (#241.737) and muffler (#190.0079) with this mapping.
POLINI MOTORI SPA
