The excessive wear of the gearbox input splines was once attributed to lack of lubrication. However, it is now believed that the wear is due to a rare manufacturing misalignment between the engine and the clutch housing. Those who have had to replace the input shaft have found that the splines on the new shsft wear as fast as the first time around.CycleRob wrote: My guess is excess heat, then conductive cooling of the veryhot/hot parts is involved...
I don't think that our 1150s have those o-rings anymore. They were hastily introduced as a response to customer complaints of gear clattering noises on the 1100. However, those o-rings, if present, would loosen up rather than get worse. I am afraid that Osiris has a dry or worn input shaft.CycleRob wrote: I've also read about O-rings on the transmission shaft designed to slow down the input shaft's rpm's when the clutch is pulled in for first gear.
Some people have managed to lubricate their splines without disassembly, from the starter opening. By prying on the clutch disk, it is possible to move it back against the diaphragm spring just enough to expose some length of splines for putting on some moly lube.