This is a complete MB Shorty Reed valve assembly kit to suit 200cc Oval ported cylinders. This reed block assembly comes with the excellent Derbi 6 petal reed valve and the new MB short flange mounting rubber, giving a better carb position and clearance from panels.

Comes complete with these parts:
Cast reed manifold, with long screw, gaskets, stud, nut, washers, SPARE MB carbon reed petals
Reed Cage 6 Petal (block)
MB special reed rubber adaptor
for 26-30mm Dellorto PHBH/VHSH

Fits these cylinders
All Large Block cast iron cylinders
Race-Tour cylinders
Rapido Cylinders
Mugello cylinders
Doesn't fit the Avanti
 
Cylinders need reed valve tuning and a boost port adding to the cylinder. The piston needs modifying for reed for 360 degrees timing and the manifold needs matching to the cylinder inlet port. Some fins need removing for this reed assembly to fit.
This is not a straight fit to a standard cylinder, of course WE can tune and do the work for you, if required. 

TOP TIP: Silicone seal the rubber in place
 
PLEASE READ THE SETTING UP INSTRUCTIONS AND CARB SETTING UP BEFORE YOU PHONE FOR ADVICE