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danST Engineering are pleased to offer this high quality velocity stack kit for Kawasaki ZX9R Carburettors. Suitable for all ZX9R carburettors marked 'CVR' (this marking will be cast into the side of the carburettors) The kit consists of the following:
4x Flange fitment 40mm Diameter Spun Aluminium trumpets 50mm or 90mm tall (use the drop down menu to specify)
4x Adapter Plates
4x Adapter Collars
8x M6 Button Head Screws
8x M5 Countersunk Screws
Please note that the maximum length for custom trumpets is 90mm.
This kit has been designed for anyone running the bike carburettors without the original airbox arrangement - particularly in kit or modified car applications.
A pipercross PX500 or PX600 with the appropriate baseplate can be incorporated into the kit if desired. Please contact us for further information and fitment options.
Below are links to two different engines fitted with two popular bike carb kits (one 1800 zetec with R1 Mikuni carbs, one Ford 2.3 Duratec fitted with ZX9R carbs). The lower lines are both carb sets without trumpets and the higher lines are when fitted with our 50mm trumpets. In both cases significant performance increases (typically 5-9bhp) are seen between 3500-6000rpm when the carburettors are fitted with our trumpet kit. Additionally the torque curve is seen to be much smoother. Note that the Duratec is making peak power very low in the RPM range due to a very restrictive exhaust (soon to be replaced!), but the effect of the trumpets on engine performance is clear. We see so many bike carb conversions running without any trumpets (bike breakers often remove them along with the original bike airbox) - ALL of which would see the benefits highlighted below, probably the cheapest power you can find!
1800 Zetec on 40mm R1 Carbs, no trumpets vs danST 50mm trumpet kit
2300 Ford Duratec ZX9R Carbs, no trumpets vz danST 50mm trumpet kit
NOTE! Please check your carburettor type is as described and shown in the photographs. If in doubt regarding fitments please contact us.
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Tags: Trumpet, Velocity Stack, ZX6R