The reason a vmax4 didnt have case webbing is its a "cylinder reed engine"..... thats comparing a apple to a cucumber, totally differnt engine design. A redhead is a fair comparison case wise to a srx/viper engine, its a case reed engine, however your dealing with a differnt stroke and cylinder design.
the webbing is all about packing the case and controlling the velocity up thru the transfer ports, yamaha evidently felt the need to use it in the srx/viper engines to take control of packing the case. It was surely needed for the srx600 engine as the piston is very small for the case/port design, seen lots of differances when modding that engine.
engines with the webbing cut out will increase case volume, but if your not needing that case volume increase, would actually lose pumping effiency, not the other way around.
opended up cases work well with highly modded race type engines, not so much on stockers. It may seem to "run good" but they dont have as much low to mid range power as with the webbing in due to the crankcase pumping loss.
It surely 110% has NOTHING to do what so ever with rod bearing failure.
the webbing is all about packing the case and controlling the velocity up thru the transfer ports, yamaha evidently felt the need to use it in the srx/viper engines to take control of packing the case. It was surely needed for the srx600 engine as the piston is very small for the case/port design, seen lots of differances when modding that engine.
engines with the webbing cut out will increase case volume, but if your not needing that case volume increase, would actually lose pumping effiency, not the other way around.
opended up cases work well with highly modded race type engines, not so much on stockers. It may seem to "run good" but they dont have as much low to mid range power as with the webbing in due to the crankcase pumping loss.
It surely 110% has NOTHING to do what so ever with rod bearing failure.
