Diagram of oil lines for 1983 sportster. H-D

SOURCE: oil line diagram for a 1975 sportster

i have a 1983 sporty service manual that has everything in it from basic spark plug changing to overhauling the entire bike wiring diagrams oil diagrams etc... a very helpful book indead can be purchased from almost any harley dealer or online

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Little tip -The only time the oil cooler will cool is when the bike is moving and when the bike is moving you don't need the oil cooler. This is from a factory harley tech.

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www.bikepics.com/yamaha/virago500

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I can send you a diagram but not through this forum. The file size limit here is 150kb. Contact me directly and I'll send you a drawing of a later model but the oil line connections are the same.

Basically, the input oil line comes off the bottom of the oil tank and goes directly to the backside of the oil pump. The oil is pumped through the engine and then scavenged by the oil pump. It' is pumped out the front side of the pump to the oil filter if it has a spin on filter on it somewhere. If not, the line goes back to the oil tank and connects right at the cap. This oil tank uses the drop in type filter or the filter that has a replaceable element in the cap. The only other oil line is a breather line that comes out of the cam chest just in front of the front chain sprocket, you'll have to take the chain sprocket cover off to see it. It goes up and behind the oil tank to the small hose connector. That's the breater vent for the oil tank. The vent that comes out the front of the cam chest has a pipe on it that comes down and dead ends. It doesn't connect to anything.

good Luck
steve

SOURCE: does anyone have a diagram

You '70 model has the "long" style oil pump on it. It has a inlet and an outlet. Of course, the hose from the bottom of the oil tank goes to the inlet. From the outlet of the pump, route your oil line to the oil cooler. Then from the oil cooler back the top of the oil tank where the cap goes on. The oil filter is inside the tank under the cap. There is also a vent hose that comes from just in front of the front chain sprocket that goes to the small nipple on the oil tank. This is the way most people run the oil lines.

Ride Safe
Steve