FZR jetting

Wasn't completely happy with the jetting. The top end was really buzzy, lots of vibration, and the low end a bit lurchy. So I decided to go up on the main jets 120's and turn in the air screws by half a turn. This done, I am also concerned about this bikes white lining. It is just crap, so looked at the alignment of the wheels which seemed OK, and the next choice was to look at the spongy fork, I removed the gold valves and adjusted them to have 4 threads showing. There was some funny stuff bunging up one of the valves so I cleaned that all out but have no idea what it could be.....

Ducati valve adjustment

So, in order to change/check the shim sizes you need to remove the rocker shafts after having removed the covers. I was slightly concerned that because the cover holds a bearing that the shaft would become unstable but it doesn't appear to make any difference. With the covers off you can screw a M5 screw into the shaft and then pull out the shaft, being careful to grab the shims and thrust washers as they fall and noting carefully what positions they are in.

With the inlet rocker on the bench, measured the shim thickness and calculated the corresponding amount to sand off.  Apparently this is customary practise for ducati shims and it worked pretty well and after two attempts I got he clearance on the opening shims to within spec.

I am considering the closing shims as good and the horizontal cylinder was also just within spec so that was left as well. On the opening exhaust rocker the end of rocker shims were all at one end without any thrust washer! I think this has been badly put together so I have moved a thrust washer and shim to the other end, I need to see what the spec is on the end float for these shafts.

Ducati Valve adjustment

Hi,
I got stuck into doing the valve adjustment on the Ducati. You really need to remove the tank, side panels and the rear carb to get good access to the valve covers, oh and the battery, which BTW, was at 12.6Volts - so good.

The front Cylinder :-

Inlet opening measured between 0.005mms and 0.1mms
Exhaust opening between 0.15 and 0.2mms
Closing exhaust 0.05mms
Closing inlet zero measurable clearance but I could turn the shim

The rear cylinder :-

Inlet opening no measurable clearance so less than 0.05mm
Exhaust opening between 0.1 - 0.15
Closing Exhaust 0.05mm (tight)
Closing Inlet 0.05mm (tight)

In my opinion all of the closing shims are about right i.e. very little clearance bordering on the zero, whereas the opening shims definately need some work.

Now I have to do some research about how to remove the rockers and cams(?)  and where to buy shims.