Rocker Mayhem

Here are some pictures of the mess that Nichols uncovered. Click on the thumbnail to get a full size (1600x1200) version...

Chris Kelley - Ducati mechanic, shop owner, and Helpful Ducati List Member (tm) - had the same problem on his 1996 Ducati 916, and also got little/no satisfaction. He has pictures on his ducatitech.com web page also.

Sigma Performance in the UK has also seen the rocker failure, but they have a slightly different take on what the issue may be...

UPDATE: Ducati North America has issued letters to people with known rocker problems, including myself and Mark Buckelew (who's done much to bring this to their attention). They basically concede that there has indeed been a plating problem in the past, but that things have been fixed. They also point out that the rocker problem will be covered under warranty (even if outside the standard warranty period). So, if you have this problem, definitely contact your local dealer who should take care of it no problem. If you have problems, you should contact Renato Aime, the National Service Manager for Ducati North America - he's a very fair and sensible person. He can be reached at +1 973 839 2600.

Here are copies of the letter that Mark and I received from Renato:

Overall shot of the front cylinder head.

Closeup of the bad rocker on the front cylinder head. The big patch of chrome missing from the face of the rocker is very apparent in the full size image.

Another closeup of the same rocker.

Overall shot of the rear cylinder head.

I was a bit too close to the rocker for this closeup, exceeding the camera's minimum focus distance; you can still make out the big patch of chrome missing from the face, however.

Another closeup, again exceeding the minimum focus distance of the camera.

Here's a shot of the front cylinder head on the right side. The black stuff all over is dust from the cam belt, which was rubbing on the cam pulley due to an alignment problem.

A closer shot of all the grime in there...

This is a closeup of the cam pulley/sprocket where the rubbing was occurring. If you note the wear pattern on the teeth, you can see that the belt was riding on the innermost portion, and had actually polished up the rear surface.

Same pulley/sprocket, different angle.

This is a cam pulley/sprocket from the rear cylinder head, and an example of what proper wear should look like. The backing surface isn't all nice and shiny, and the wear is clearly in the center of the running surface.

Since the bike was going to have some downtime anyway, I figured I'd have them install one of their lightened flywheels - a beautiful piece of machining. The best part of course is that it shaves some 4 pounds of rotating mass...

Another shot of the Nichols aluminum flywheel (very minimalistic, eh?)

Here's what a stock flywheel looks like. And believe me, it's even heavier than it looks, being a chunk of solid steel.

The other side of the stock flywheel...

Last modified: Thursday, 30-Nov-2000 15:34:41 PST
Questions/Comments/Problems: Paul H. Yoshimune