derbi flat reed 50cc cast iron

derbi variant 40mm 50cc cast iron cylinder kit with decomp head

includes all cylinder, head, piston, rings, wrist pin, clips, head, base and exhaust gaskets + a variator 6 roller set

please check to make sure this is the right model for your bike and that yer ready to do the work to make this fit perfecto. this is designed for the flat reed derbi engines!

use ES long thread plug

piston diameter = 39.88mm

stroke = 40mm

cc = 49.96

compression = 1:11,5

treatland