Here are the most powerful kits for YAMAHA DT, RD, YSR, TZR 80cc liquid cooling LC. The direct competitor of MALOSSI cast iron. From the POLINI house, this aluminum kit is composed of a high-end aluminum cylinder, a two-segment chrome-plated round end piston 1.2mm thick and its joints.
It comes without cylinder head and can be mounted with the original cylinder head. A very powerful kit not to put between any hands! With its diameter of 55mm, it still offers 99.78cc in the company of the original race crankshaft 42mm YAMAHA DT, RD, TZR, YSR 80cc liquid!
In addition, it has amplified diagrams, well-corrected and improved channel shapes, transfers and exhaust light. Aluminum and chrome treatment are of excellent quality for precision hot expansion and increased strength and trouble-free cooling!
POLINI announces 12.7hp has 9100 revolutions per minute, we know however that the increase in torque is it of the order of 30%, we also know that some, with a well released exhaust, a good carburetor, a racing candle and that an improvement of the valves manage to bring back this cylinder without problems to the bar of the 15 to 17hp.
Optionally we offer a stage 1 preparation, this preparation is a modification of the channels and exhaust light by increasing the diagrams and improving the pipe, it increases the performance of the cylinder. An improvement of the piston and skirt stocking is also included in this modification. Allow a little extra time for this preparation!
