This is the step by step overhaul of a 1976 R75/6 BMW 750cc motorcycle. I’ll try to point out all the tips and tricks throughout the process to save time and unneeded wrenching.

A little history on the bike: I bought it from Carolina BMW in 2004 for $2,000. The bike was owned by a BMW mechanic for about 20 years. Check out a few of the parkway shots below to see the bike when I first brought it up to the mountains. Other than a fist size dent in the top of the tank, it was in immaculate shape when I first got the bike.

Bike on the Blue Ridge Parkway R75/6 BMW Front view of r75/6 BMW motorcycle

(Descriptions are below the images)

R75/6 BMW

Before the work began

R75/6 BMW

The oil leaks that drove me to tear into the bike

R75/6 BMW

The side handle and the battery top plate removed. Maybe someone knows a trick that I don’t but I wasn’t able to remove the battery without taking the handle off as well as removing the two nuts that keep the battery tray from rocking back.

R75/6 BMW

Remove the two plastic spinner nuts at the back of the gas tank

R75/6 BMW

Tank removed

R75/6 BMW

Remove the three oil filter bolts that hold on the cover

R75/6 BMW

Make sure you check the gasket placement when the cover goes back on

R75/6 BMW

Remove the oil filter inner cap

R75/6 BMW

Oil filter removed with a bent piece of wire

R75/6 BMW

When I pulled the oil filter out it left behind the inner o-ring. The top cork screw tool is the one that finally did the trick.

R75/6 BMW

Left carb moved to the side

R75/6 BMW

Three allen bolts for the front cover

R75/6 BMW

Front cover removed

R75/6 BMW

Carbs out of the way

R75/6 BMW

I pulled the air box cover and found that a squirrel had been using my bike for a winter food storage spot.

R75/6 BMW

Amazing that my carbs aren’t clogged with all these acorns in the intake.

R75/6 BMW

R75/6 BMW

Starter cover removed to clean out the acorns

R75/6 BMW
Don’t forget the two 10mm nuts between the fins on either side of the head.

R75/6 BMW

R75/6 BMW

August 5th

 

Removing the Rocker Arm Shafts. Don’t just take them off one by one, work your way around in a zig zag pattern.I found out after removing all six bolts that in order to get to the Push Rod Tube Seals you don’t need to split the cylinder head from the barrels. As you can see in the next picture the two middle bolts can remain on so that you won’t need to swap the head gasket. If you’ve got leaks at this seam you might want to replace the gaskets anyway.

 

R75/6 BMW

With the cylinder head removed you should lay it flat on a workbench and fill the dirty side full of tranny fluid or motor oil to watch for leaks around the valve seat.

R75/6 BMW

R75/6 BMW

If you remove the cylinder head from the barrels you can re-thread a bolt back on as a stop. This is so you don’t have to deal with  the piston rings jumping out.

R75/6 BMW

R75/6 BMW

Here you can see the new seals going on the push rod tubes. They should have a line or arrow that needs to be oriented down.