PhillipLarsen

On mine the nuts on the oil line were a hard to turn initially but used a little wd40 and loosen/ tighten and they loosen up. If only one is giving trouble you might consider disconnect all three ends of oil line and take the fitting with the oil line off on the difficult one and then work on it on the bench

I had the oil leak at both heads ( 2004 Ballabio) where the fitting attaches to the head. It was not the oil line to fitting. If you check out other reports I think that is where the leak is most often There was an aluminum crush washer between the fitting and the head. In my case that was where the leak was. It was all original 20 years old. Looked like some kind of thread sealer or Locktite on the threads. I removed the fitting and glad I did not just tighten them up as the aluminum crush washers were quite distorted from wiggling around. I replaced the aluminum washers with copper washers and used some locktite to ensure threads sealed as well. No more leak so far.

Had my first ride of year on 2004 Ballabio after completing my 20 year (approx 25,000 km ) maintenance visit. With all the work done, new tires, all callipers & master cylinders rebuilt, new brake pads, all new engine sensors, complete “Decent Tune Up”, including plugs, air filter, etc., Roper Plate installed, drive shaft removed and greased, etc. it is just like it came out of the showroom in 2004. Good for another 20 yrs/ 25,000 km. Not sure I am! What a pleasure to ride.

Or Forever in Blue Jeans

Note my spare in the picture is my clutch master on the shelf!

My mistake, looking back through my orders from my 20-year overhaul of the 2004 Ballabio, Powerhouse UK is where I got the caliper kits for front and rear calipers. Gotham Cycles (Ducati/Brembo parts) is where I got the master cylinder kits for clutch (12mm), front brake (16mm same as used on Ducati) and rear brake. (some are the same parts as used on early Ducati 916 I think or at least use the same internal parts). You will see all the Brembo parts (with Ducati references parts on line). If rebuilding the rear brake master be sure to order the 90-degree fitting with O-ring (comes separate) as you will want to remove it from the master cylinder to make sure no bit or residue in there. That is where mine had plugged up, leaving back brake rubbing without me knowing, destroying pads, plastic pad cover, etc. On the clutch and front brake master cylinder I add a bleed banjo fitting where the brake line attaches to master cylinder. Makes it easier to ensure no trapped air. Gotham sells these as well. The parts are not too expensive, especially the rear master. I had also bought an original Moto Guzzi supplied Brembo complete front master cylinder with all the attachment, including lever, adjuster, etc., prior to finding the rebuild kits were available through Gotham. . On the shelf for a spare now. Hope this helps.

I bought rebuild kits for all master cylinders and callipers for my 2004 Ballabio last year from Powerhouse Automotive in UK. You can find them on ebay and their own website. If you don’t see what you need just ask them. They had it all for me and service was fast to Canada.

https://www.mgcycle.com/index.php?main_page=index&cPath=37_140 17768750 - $11.38 - Oil pressure switch most Guzzis thru 2005 GU17768750 [17768750] : MG Cycle, Moto Guzzi Parts and Accessories available online at MGCycle.com

I replaced the oil pressure switch recently during 20 year maintenance project, got one from MG Cycle for about USD 12.00

This always makes me think about changing the lady partners daily in the summer as I move through the week (Ballabio, Stelvio, 916, CBX, Norton, 500 Turbo, 40 Indian Chief)

I installed a Roper plate recently and found it was not a very big project. Make sure to have the needed two upper sump gaskets and one lower sump gasket on hand ( if you are going to install with gaskets), and I got a spare of each just in case one would get damaged. Lucky I ordered the extra as one arrived at dealer torn due to being poorly packaged by Piagio. The gaskets are inexpensive. With the extra thickness of the Roper plate and one extra upper gasket I found it necessary to modify the side stand mount by making the two bolt holes slightly oval and to provide clearance for the the bolt heads to accommodate the repositioned bolt location in the fitting. I used a Dremel with grinder bit. See photo of modified fitting in Gallery Pictures. Also slightly trimmed back to allow fitting to move down to align bolt holes. I thought it was best to ensure the slightly repositioned fitting is not putting any different side loads on the cam case or sump. Link to images