Keys for the seat lock and steering lock would have been the same when delivered by the dealer. For the bags and seat-belt latches, it seems likely th...

Mobil1 is synthetic oil, but Mobil1 V-Twin 20W50 carried the API SG rating the last time I checked. The Harley-Davidson Spectro 20W50 might be the Sp...

You could call Capitol Cycle and ask 'em. My local independent shop will order a box of Spectro H/D for me when I need some. Here's another tip, Mobi...

You are looking for motor oil with an API service rating of SG. Lately, I have been using Spectro Heavy Duty 20W50 non-synthetic.

I have been given to understand that the bars from a K75S will improve the riding position if you knock a 1/2 inch off the end of each side. I am also...

O.K., in my 1980 parts manual, on the piston pages for R90/6 and R90S, the rings, wrist pin, and circlip have the same numbers. The piston numbers ARE...

Well then, there are 4 things to consider. 1) contour of the domes of the pistons. 2) diameter of the valves at the seat end. 3) cam lift. 4) cam ...

The 1988 R100RS that I used to own had the electrical components under the fuel tank mounted on the frame back bone. I mention this because I would be...

I am confident that the rubber diode board mounts are in no way related to your electrical fault. The advantage of solid mounts is to facilitate heat ...

In the broadest, most general sense, you can do anything you want to do. If it were my project, I would first measure the pistons and cylinder bores ...

" You want zero play up-down or front-rear, but still loose enough for the forks to move without any binding." I guess I am showing my age here, Butt...

If I were simply cleaning and greasing the steering head bearings, I would proceed as you describe. I would block up the fork to limit the downward t...

Actually, oily intake tubes is an indication that the breather system is working properly. You can't get anything out of a system like this that is no...

This "lower than normal" oil level is a continuing mystery that has reached the level of BMW folk lore. Whatever the reason, my '79 RT displays the sa...