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Our website is all about motorcycles, especially BMW cycles. We cover rides in the Southwest and Mexico, motorcycle modifications and review motorcycle products. 


'79 BMW R100RT: Third Day Progress

Ricardo Perez

New Mud Flap & Renewed Plates!

I've had the RT now for about two weeks, but yesterday, a Saturday, I had time to work on it for the third time. This time I installed a new air filter element; changed the oil and oil filter; changed out the transmission fluid; and the rear end fluid. I used Mobile 1 VTwin motor oil and Royal Purple 75W145 for the transmission and Mobile 1 75W145 for the rear end. All the plug bolts were fairly frozen on so it took some doing to get them loose and the old oil filter was the wrong one so it was tough getting it out. BMW makes a filter that is two piece so you can install and remove it without having the frame interfere like it does when using the one piece type. I don't know how they got that filter in, but I had to tear it to get it out.
We adjusted the idle speed to just over 1,000rpm so as to make sure that the oil light didn't come on as it was doing when the idle was at about 750rmp. I also used some de-greaser to clean up the rims and the disc brakes. I lightly sanded the front discs and the breaks seem to work much better.
We took the bike for a short test run and it's running smoother and shifts better. We're still getting some oil weeping from the pushrod entry point into the block and from the oil pan gasket, but those seem to be very minor and can get to them on our next work day.