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My two cents..... Or just remove the valve. The valve only allows venting in one direction. There are legitimate reasons why the tank needs to vent in both directions. From the factory the valve should only allow venting from the fuel tank to the charcoal canisters, pressure can escape. But as fuel is used, air should be allowed back in to the tank. Otherwise you get tank suck, a vacuum developing in the tank as fuel is used. That can result in the tank suck phenomenon of tank suck when you open the tank and the tank re-expands back to normal. But you clearly don't want the one way valve installed in the other direction either as then it would not allow the fumes to vent out of the tank, potentially causing a build up of pressure inside the tank. That could end poorly. An even worse idea. If the valve is installed, you should only be able to blow through it in the direction of from the fuel tank. You should not be able to blow through it towards the fuel tank. If you open the gas tank filler, you should not be able to blow through the end of the vent line to the fuel tank with the one way valve installed. The one way valve is to meet EPA requirements in the USA. The EPA wants the fuel system to be captive, any fumes venting the fuel tank are supposed to be directed to the charcoal canisters, where they are kept until they are feed back into the engines intake tract while the engine is running. In other countries they do not have the one way valve in the tank venting system. It is just some countries like the USA that they do that for. Some people remove the canisters, others remove the one way valve. Some remove both. I would say removing the one way valve is a more important improvement than removing the canisters. I would rather the fuel tank vent goes in both directions. But for racing it was common to run a one way valve that only allowed air to flow into the fuel tank and not allow fuel to escape in the event of the bike being on its side. That was more about keeping fluids off the race track then making the fuel tank work as well as possible. In a perfect world the fuel tank vent would go in both directions.

Yet, I do not believe we have a confirmed report of a Rosso Mandello flywheel actually exploding. After the (exceedingly lengthy) debates on this forum and elsewhere, it seems (at least to me) most likely that a bad batch of flywheels was delivered during the Scura's production run. Personally, if I had a RM, I'd be inclined to run it as-is. Tenni has the same clutch/flywheel, but was made in same model year as Scura, so it has a higher risk factor (IMO).

Approximately equal to acceleration due to gravity (dropped off a cliff face) . . . Good to see you on, @Baldini! We joined here within two months of one another. Twenty years ago, brother!

Even though I've read lots about tank suck here,I only ever experienced it recently when I took my V11 for it's 1st extended hard test run. The bike ran great,but when I went to refuel,took great effort to open the tank lid and the tank sides shook very harshly as the vacuum let go. Was lucky the paint didn't crack. The bike ran like crap for the 10 miles home and would barely idle. I cured it by re plumbing the tank vent line from the existing T connector/lines to the vacuum ports on the TBs to a single line open to the atmosphere;then capped off the vacuum ports at the TBs. I also cleaned out the 2 vent holes by the tank lid opening,iirc located at 6 & 7 0'clock. I used a small plain metal wire I had handy, but the next time I change guitar strings, I'll be keeping an old wound G string for the tool box, I think it would work perfect for opening/clearing those vents. The bike has run like a top since. fwiw

My RM has done 85k. So far all good

Ha ha Mate I've had some work done on the bike and sorted the suspension so she's all ready to go if it ever stops bloody raining down here....! I can't wait to do a few more but will have to wait till after Xmas.Crazy time of the year with weather to match. Actually, some of the high- country roads are washed out and won't be re-opened for some time but like last time we'll figure out a way round it and I'll report in due course! Cheers Guzzler

0 - 140mph in 4.5 secs good grief Docc, what have you done to the poor thing? Hope you keeping well. KB

^^^^ Yes, yes they did.

Used them for 15 years on Ducatis with no issues. They are more than twice the price of the UFI filter here!

IDK what brand filter anyone uses , but the Wix is about as good as you can get .

The tank should be at atmosphere. The in-line valve, or the vent tube routing is usually the source of the blockage.

All inductive sensors I've known have been pretty much the same, called out at .025" + or - .010". The stop working near .050". Mine actually had witness marks on the tip where it actually made contact with the tone ring, but it went 20k miles like that over a few years so I'm not blaming that- however, I was sure to clearance the replacement properly. Heavy truck and many automotive ABS sensors are mounted in a simple metal bracket with a tight slip fit, and are set for clearance by pressing them to zero against the tone ring. They find their home when bearing clearance pushes them back just a bit. (This also causes many ABS fault lights when bearings are loose or enough dirt collects to push them back too far)

Once you have had your head out of the sand , you can't put it back . Tteat it w/TLC .

That sounds like good method, regardless. My last shot at greasing that %#@$& front UNI only served to waterproof the general area . . .

It seems there is minimal difference (for our V11 purposes) between a V-rated (149mph/240km/h) rating versus a Z-rated (149+mph/240+km/h) tire. Even an H-rated tire is probably fine (130mph/210km/h) unless you intend to ride flat-out across The Salisbury Plain for hours. FWIW, I've never seen mySport over 135mph. For the record, I didn't say I rode it with the Veglia pegged, just "never over" . . .

I did once harbor strange thoughts of actually doing this, and earlier this year I had to stop myself responding to a Ballabio advert, as I knew there would be a good chance in it joining the rest.. which are 2 red frames, the carryover, and 2 black frame long tanks. Bonkers really & I’d like to get a Triumph Scrambler in the next couple of years before I have to downsize to a Honda cub or something similar due to age & arthritic joints And the Griso isn’t going anywhere until the dreaded downsizing becomes a reality