Motorcycle Friday
Today with the threat of rain bordering on "Epic Proportions" we decided to work on the Moto Guzzi.
So, I ran over to Jimmie's house around 10:00 and we got to work.
After a small issue with the ignition timing triggers involving crossed wiring the bike was running.
Albeit not well.
We checked the compression and found a significant disparity between the left and right cylinders.
The left was acceptable at around 150 PSI but the right was over 230 PSI.
With the throttle wide open the gap closed somewhat but was still something like 210 to 240.
That problem still needs further investigation.
The right cylinder was running extremely rich at low RPM and the bike would shut down at about 4000 RPM.
The right carb was removed and all parts inspected.
The Delorto carburetor is very similar in function to the Amal, we looked at and tested every orifice, we were so intrusive that we could have worked for the TSA.
Then we had one of those Ah Ha! moments.
The main and idle jets had been reversed by a previous carburetor diddler.
These are shown as part numbers 16 and 17 in the diagram.
Now it's my opinion that the designer allowed this problem to happen.
If the idle jet and main jet had different threads there would be no chance for this confusion.
Murphy needs to be kept in check by careful engineering not careful inspection afterwards.
Just my opinion...
We put them back in their rightful homes and Voila!
Check the link below for the result.
Now the bike runs and idles well, you can crank it up past 4K RPM without problem.
With that problem solved, we moved on to the brakes.
The front left disc and the rear disc are operated from the rear brake pedal in what is known as linked braking.
It seems that the circuit has a lot of air so the brake bleeding process began, then another Ah Ha! moment arose, the brake fluid was DOT 3 and it should be DOT 4.
A trip to the auto parts store was needed.
At this time the rain really arrived with strong winds and a torrential downpour.
Back to the brakes, after a short time of being seriously drenched, we decided to give up for the day happy with the success achieved.
The brakes will more than likely be a project for next Tuesday.
Now we can really say,
Ciao Bella
Norm
