Kit 65cc Ø45mm POLINI cast iron for YAMAHA CHAPPY, BOP

Here is the POLINI Cast iron 65cc high engine kit in 45mm diameter for YAMAHA CHAPPY and BOP 50. An ideal kit to increase the performance of your machine, preserve solidity, increase torque, recovery and top speed. Of course, this has nothing to do with an original cylinder. Have



This one has 6 intake transfers with well-worked channels and an enlarged oval exhaust. This cast iron cylinder will guarantee you excellent engine strength compared to a more picky and fragile aluminum cylinder over time. Its fins are specific and optimized for engine cooling and better heat dissipation.



Accompanied by a top-of-the-range bi-segment piston, with a low domed crown, preparation and opening on the rear apron to improve sweeping and large side grease nipples. This piston will promote the torque and the solidity of your engine by increasing friction, with its 2 segments Ø45mm X 1.5mm thick. Have



It is unfortunately delivered without cylinder head, you can use the original one, taking care that its surface is correctly smooth, planned, clean. Delivered 100% complete as presented.

Technical characteristics:

-Exhaust with external thread Ø42mm
-Admission with fixing centers 58 X 35 mm



We recommend to accompany it with at least: a carburation of 17.5 to 21mm, a racing spark plug with a cold index, a 100% synthetic racing oil, racing exhaust , pinion with one or two more teeth . ..

This pack contains:

-Cylinder in cast iron 65cc Ø45mm 6 oval exhaust transfers
- Bi-segment piston, low domed cap, side greasers
-Two steel segments Ø45mm X 1.5mm thick
-Crab type piston clips Ø12mm
-Piston pin Ø12mm X 36mm
-Engine gasket pack
-Notice
-Guarantee
-Sticker



As an option, we offer a stage 1 preparation, this preparation is a modification of the channels and the exhaust port by increasing the diagrams and improving the duct, improving the rear intake, the lower skirts and the piston, it increases cylinder performance. Count a little extra time for this preparation!