How do u set the timing on a oil pump for a 76 harley sportster xlh 1000 lay down pump

Question edited for a lot more clarity.
Question moved from Cars and Trucks

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Service Manual

1970-78 XL/XLH/XLCH/XLT-1000 Service Manual

Rat Bike Service https://www.ratbikeservice.com > dwnld > 1970...
The maintenance and repair information in this manual applies to the 1970-72. Sportster Models XLH, XLCH, the 1976 XLT and the 1973-78 XL/XLH/XLCH. COPYRIGHT ...
235 pages
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Two things to check:

1. there is a 4 pin black starter relay maybe 1" cube, usually under the seat, that goes bad. since they are impossible to get from Harley, go to JPcycles.com and get a new one. I have to replace mine every year or so.

2. Disconnect the battery. Open the Starter's attached solenoid cover. There is a copper bar that gets pitted. If it hasn't been done before, flip it over. Otherwise try to clean it up. Replacing would be a good idea if you could find one. Otherwise buy copper stock from Mcmaster-Carr and make one.

It ain't easy owning an old school Sportster... It's an adventure!

Turbocouch
76 XLCH 1000 and 81 XLH 1000

If the oil pump is somewhat worn, and the oil is really thinned out with gas, yes there is a possibility it will not pump. I had a 1976 XLCH, that I had to do the top end on. I checked the oil pump and replaced the gear set. I believe there may be a wear plate on either side of the gear set as well. If you drain everything from the tank, and take the oil pump apart, clean and check for wear, replace those parts mentioned, make sure the housing is not worn or damaged, put it back together and time the oil pump, it should take car of your problem. Fill the oil tank with Lucas 20-50w or 50w Lucas Synthetic. Oil this thick will eventually mix in the primary chain chamber and cause the clutch to slip. I just used to change oil more often. Oil is cheaper than a new engine or clutch. One thing: to own a 1976 XLCH means you need to like to work on bikes. Personally I live for it. I now have a 1981 XLH that I brought back to life.

On the shaft housing of the pump that goes up into the gear case, there is a "window" or little cut out place. With the cams installed and timed, slide the pump into the gear case with the mark on the pump drive shaft aligned in the window. It has been a long time but I'm pretty sure I'm right on this.

Good Luck
Steve

Bring the engine to top dead center and find a way to lock the engine in that position. When you lift the oil pump into position, you'll notice the the oil pump drive gear rotates when it engages the pinion gear. You have to turn the pump backwards so that when it rotates while you lift it up, the hole comes into alignment with the slot when fully seated against the case. Just like timing the distributor or magneto.

pump is not reliant on the timing marks its just a pump so id say it hasnt been primed when assembled!
thats why top end is noisy {no oil getting through]
check the bleed holes for restrictions if ok then the pump needs servicing
Cheers rob.