In 250 Nationals class, defending Jason McIntyre's title became easier after a reed valve failed on John Roberts'Stockman-Kawasaki.
22.
Nevertheless, current technology favors reed valves almost to the exclusion of rotary valves due to their simplicity and low implementation costs and less rotational mass.
23.
This incorporated some minor engine modifications ( now with reed valves ) and a switch to an all-red interior, excepting the plentiful exposed metal.
24.
Rotary valve engines can be tailored to deliver power over a wider speed range or higher power over a narrower speed range than either piston port or reed valve engine.
25.
The WHE-25 design used a reed valve, which is a piece of thin metal covering the top of the piston ( as shown in the figure ).
26.
The permanent solution to prevent water from flooding the interior is to simply to remove the reed valve in the cowling drain so the water can flow straight and through the drain.
27.
It is powered by an 84.7 cc single-cylinder, water-cooled, two-stroke, reed valve inducted engine and uses a six-speed gearbox.
28.
This was due mainly to the design by the off road motorcycle enthusiasts at PABATCO . On the second year of production Hodaka experimented with reed valves and almost brought them to market.
29.
This craft was powered by a 951cc ( called a Type 947 ) engine with reed valves on the intake and R . A . V . E . valves on the exhaust.
30.
Both reed valve and rotary valve-type two-strokes are common, with four-stroke model engines using either conventional poppet valve, and rotary valve formats for induction and exhaust.
