I have an ATM, Blata Elite 11, GRC, or Pasini with a Polini motor – what can I do to increase performance?
ATM, Blata, and Pasini do not use a Polini exhaust, but all of the engine mods should work. Some GRC models have used the Polini exhaust, and can fit the Polini racing exhaust as an upgrade (some fabrication may be required). If you have a Polini air-cooled motor, you can still add the carbon fiber reeds . This modification alone provides a nice top-end performance boost. If your bike has a 4.2 hp motor, you can fit the 4-petal reed kit (143.270.003) to boost you to 5.5 hp. If you have a water-cooled model, you could add the race-prepared 5-port cylinder (143.010.006) or add a 50cc big bore kit (143.004.006). The 50cc kits come without the racing crankshaft , but the crank can be purchased separately (143.080.002). Adding the 50cc kit alone to a 6.2 hp water-cooled motor will produce approximately 8 hp. This is one of the most cost-effective performance modifications. For even further gains on modified engines, replace the 14mm carb with a 17.5mm carb.
