Kit with standard Minarelli reed valve has less power than the Stage6 reed valve and is only suitable for up to 25mm carbs.
Reed valve manifold kit.
Use: original cylinder, Rapido, Mugello, SR, MB
Power: Reed valves increas power at low revs. Without changing inlet a small loss of max power can occurr. With holes in the piston and/or a boost port the power will increase because of the 360° open inlet.
Carb size: The reed valve is made for a maximum of 28mm carbs. That is a good size for up to 22hp. Bigger carbs in this power area will bring only little more power, increase fuel consumption and worsen throttle response. Our demonstration engine achieved 28.5hp with a Keihin PWK28! The used Stage6 R/T reed valve may look small but has for example 20% more area than a standard Malossi PX reed valve.
Blow back: Because the reed valve closes the inlet when there is pressure in the system the blow back is reduced massively.
Carb adjustment: Because of less blow back it is easier to set up the carb as the again sucked in blowback doesn't enrich the air ratio anymore when opening throttle again. The jetting needs to changed but you can't say beforehand which way.
Fuel consumption: The additional power at low revs and the less blow back reduces fuel consuption. Depending on the cylinder this can be up to 50%.
Throttle response: Because the cylinder has not to cope with the additional blow back gas it responds much better to throttle changes.
Starting: The better low down power lets the engine start better.
Durability: The reed block is Viton rubber covered so the plates are dampened which increases durability.
Spacer: Will be delivered but is not needed.
Rev plates: Will also be delivered and are better at high rpms (>12000) but decrease durability, so not recomandable.
Gaskets: Can be used but we recommend using fluids like DirkoHT.
Spares: There is a second plate set made of glass fibre which we recommend to use as they increase power at low revs. Spare plates are very cheap and also any Minarelli reed avlve can be used. The rubbers are available at any Mikuni dealer.
Space: All carbs up to 35mm will fit under the panel! On most Lambretta and carb models a rubber bellow with a filter on can be fitted. The following carbs fit with rubber bellow on a Li3 for example: Dell'orto PHB/VHSB bis 30mm, Mikuni TMX bis 30mm, Mikuni TM bis 35mm, Keihin PWK bis 28mm, Koso PWK bis 34mm.
Rips: Depending on the cylinder one or two cooling fins have to be cutted. The work is very little, on some cylinder types nothing has to be cutted. The cylinder cowl has to be cutted.
Inlet hole: The manifold is developed to also be of use on small cylinders. On bigger holes the manifold hole should be adapted. It has enogh meat to do this.
Flow: Version V3 has been tested on a computer system to improve flow.
Available rubbers: 102266, 101707, 100771 (letzterer passt nur mit extra Dichtung oder viel Dirko)
Quality: The manifold is casted in Germany by a reknown automotive company with a high dense alloy.
V2: New reed valve that produces 1-2hp more than the V-Force.
V3: Complete new construction as a high dense cast. Manufactured in Germany by a professional automotive supplier. Improved adaption possibilty to different cylinders. Improved frame clearance. Smaller base hole and more meat to adopt to different inlet hole types. Computer calculated imrpoved air flow design.