Someone explain to me how pumping out of a dry area works.
The meriden pumps had a scavenge side and a pressure side siamesed together if you will.
I added an oil filter to mine ('70 T120R). Takes the same cartridge as the Tridents did. Also have electronic ignition, mikuni carbs, solid state rectifier and voltage regulator, led tail light, halogen headlight, all while maintaining the original look. Oh and I have stainless spokes laced by Tom. I am thinking hard about selling it though.
The sludge trap that runs through the crank was the "secondary filtration" system.
From the shop manual:
"The Rocket3 utilises a dry sump lubrication system whereby a pressure pump takes oil from an oil tank and delivers oil under pressure to the engine and transmission." ----That's why it's important not to coast the bike downhill without the engine running. transmission bearings are starved for oil----"A scavenge pump collects oil from the sump and returns it to the oil tank.
"The oil tank is attached to the upper crankcase on the left side of the motorcycle. Situated within the lower crankcase, the pressure pump is gravity fed from the oil tank via an internal drilling. An oil tank drain plug is situated at the lowest point in the drilling, in the sump itself."
Contrary to some belief's, there is an "oil non-return valve" located in the lower crankcase which prevents oil from draining from the tank while the engine isn't running. Always, before you check your oil level, you need to run the bike for a minute or so and then check the oil which is just the opposite of a car or bike with a wet sump. Checking the oil after a period of non-use could result in a false reading if the non return valve is leaking and possible over filling of the lubrication system.
You read this BART??
Actually, the system is very similar to the older Meriden bikes except the Meriden bikes had a piston pump (one) instead of the R3's twin rotary pumps. The meriden pumps had a scavenge side and a pressure side siamesed together if you will.