MMR "PRO SERIES" headkits are tuned in house by Scott Finlay. Scott is a specialist in small 2 stroke engines & is known the world over for his very fast ultra-reliable race engines. Scott’s work has won many championship titles in minimoto, metrakit, conti cup & 125cc road racing. These kits set the new gold standard in rc engines.
PRO-MX 36mm 4 bolt Zenoah Cylinder Kit.
30mm (+2mm stroke) =27.2cc
Cylinder porting - port time/area set, roof angles altered - for more efficient scavenging, port edges re-chamfered leaving no sharp edges that could snag a ring or scrape the oil off the piston plus the Intake & transfer tunnels re-surfaced to an 80 grit finish. Cylinder head modified to increase performance , squish band professionally machined to match the crown of the piston, increasing burn efficiency. Squish band set to 53% of the bore area & compression ratio set @ 15.2 : 1 (if built with the recomended clearance of 0.40mm). Piston skirt reshaped to aid flow into the transfer tunnels & reduce weight.
Kit includes : cylinder , piston , ring, piston pin , circlips, stock cylinder gasket. spark plug. Fully illustrated fitting instructions.
This kit fits the Zenoah G240RC & G270RC 4 BOLT engines.
This is a race prepared product and there is a limited warranty.