The rust is what happens when the bike sits for a year or two without being run. There’s moisture in the air. That air enters the engine. Anything not protected by the oil will rust. Engines need to be run.
Update for the valve adjustment: Just to be clear, each cylinder needs to be at TDC on the compression stroke before adjustment. Also, what I thought was a screwdriver pry mark was in fact a cylinder stamping in the shape of a V, probably done at the factory. Both my v7 and v9 had the stamping on each cylinder head. Thank you for all the views!!! Later Gaters!!!
If you read the comments below, it explains what happened at the dealership. My v7 stone didn't have any corrosion. Humid weather at the dealership, and they never let the bike warm up all the way. Everything's fine now, no worries 👍
cadrecycle.com/moto-guzzi-service-manuals/ I believe that it's the same clearance, but double-check it. Here is the link to the service manual free download. 😀 Good luck, little dummy!
Great looking bike. Your analysis is spot on, a migration of internal moisture. The dealership may have started the bike for only short periods, not letting the bike warm up to full temp. Lay or stuff a rag on the top of the heads to completely block off any debris or liquids from getting into the oil passageways. Then clean those rusted rocker arms off with brake cleaner. Then take a smaller artist type paint brush and go over all that rust with Rustmort. Leave alone overnight. Wipe off any excess and let dry. Rustmort is good at stopping and encapsulating rust, especially thin rust like you have. If that isn't satisfactory, have those rocker arms plated?
Thanks for the feed back. The moisture just attacked the weakest metal being the cast iron rocker shafts. All the other parts inside seem good, either plated parts or aluminum. I'll open it back up soon and try your suggestion. I'll post another video with the results. That would be a good job for a laser cleaner but who knows where to find that service.;)
What an unbelievable discovery! Corroded part on a new bike? I'll be upset too if that happened to me. The dealership where I got it from will surely hear from me. I want to know what they have to say to that . .
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Sucks that they are corroded.
Pro tip on Guzzi valve checks. Check the left side first because the next rotation the right side will be at TDC.
The rust is what happens when the bike sits for a year or two without being run. There’s moisture in the air. That air enters the engine. Anything not protected by the oil will rust. Engines need to be run.
Oh dear, the silicone rubber seal is not a gasket. It is supposed to stay on. You just rub some oil onto it and put it back. Indefinite life. Duh!
I could just imagine you taking off the valve cover on your V7 as well just to check . . which may not be a bad idea at all . . .
I already did the valve adjustment on the v7 stone and everything was just fine!!!
How often does valve adjustment need to be done on the v9?
The first adjustment is done at around 1000 miles and then every 5000 miles after.
Update for the valve adjustment: Just to be clear, each cylinder needs to be at TDC on the compression stroke before adjustment. Also, what I thought was a screwdriver pry mark was in fact a cylinder stamping in the shape of a V, probably done at the factory. Both my v7 and v9 had the stamping on each cylinder head. Thank you for all the views!!! Later Gaters!!!
Thank you for the video! Do you manage to move the cylinders without putting the bike on a central stand?
Yes, take out the spark plugs and put the bike in 6 gear. It will roll over the engine really easily.
Love the video but you didn't pull the cylinder head off, you pulled the valve cover off.
Really!!!!!!
Weird. I have a v9, bought new, and have had no such issue with corrosion.
If you read the comments below, it explains what happened at the dealership. My v7 stone didn't have any corrosion. Humid weather at the dealership, and they never let the bike warm up all the way. Everything's fine now, no worries 👍
Hi Dummy,thanks for great and simple video,please is valve clereances same for V9 Bobber 2016??
I will check and get back to you!
cadrecycle.com/moto-guzzi-service-manuals/
I believe that it's the same clearance, but double-check it. Here is the link to the service manual free download. 😀
Good luck, little dummy!
@@bigdummy7872 thanks!
You removed the rocker cover NOT the cylinder head
No kidding
You can try W40 on the rost
Great looking bike. Your analysis is spot on, a migration of internal moisture. The dealership may have started the bike for only short periods, not letting the bike warm up to full temp. Lay or stuff a rag on the top of the heads to completely block off any debris or liquids from getting into the oil passageways. Then clean those rusted rocker arms off with brake cleaner. Then take a smaller artist type paint brush and go over all that rust with Rustmort. Leave alone overnight. Wipe off any excess and let dry. Rustmort is good at stopping and encapsulating rust, especially thin rust like you have. If that isn't satisfactory, have those rocker arms plated?
Thanks for the feed back. The moisture just attacked the weakest metal being the cast iron rocker shafts. All the other parts inside seem good, either plated parts or aluminum. I'll open it back up soon and try your suggestion. I'll post another video with the results. That would be a good job for a laser cleaner but who knows where to find that service.;)
Looks like cosmolene a protectorate!
Nope, just rust.
Great video, thanks. 😃👍🏻
What an unbelievable discovery! Corroded part on a new bike? I'll be upset too if that happened to me. The dealership where I got it from will surely hear from me. I want to know what they have to say to that . .
Don't worry, I'll be able to fix it myself!!! I don't like sending my bikes back to the dealership because some num-nut will do more harm than good!!!