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guess that noise....

Was adjusting the valve clearances the other day as they were all slightly large... Bike has now covered about 22,000mi, sometimes noisier than other times, but still running!

Bit of an obvious newby question - the bolt that is tightened to close the valve clearances: surely that will only ever be able to be turned so many times. i.e has a certain lifespan of x number of valve clearance checks (assuming they always need closing)

The reason I ask is that one of the RH valves was pretty much at short limit of the screw, that is to say the thread is just about all the way to the top of the locking-nut


Sounds like you have a tappet gone.

The adjuster screws don't have a limit of turns. But they can be damaged if over tightened
 
Back to Thermostats for a moment.
In the Stelvio (and Norge/Sport) Manuals, there is this pic . . .
Thermostat.webp

It's not shown in the Griso version, nor is it mentioned in the text for the Oil System Description.

I have a vague recollection of reading something about this not long after I bought my Stelly (Oct/Nov 2015?).

Anyone know if it is fitted?
 
John, pretty it was found out a while ago not to be present on the bike.

That being said you are a day late. I just buttoned up the oil pan last night after having it off to check the internal filters. Good news is everything looked fine. I don't recall seeing anything like that, but then again, was not looking for it.
 
John, pretty sure it was found out a while ago not to be present on the bike . . .
That ties in with what I (vaguely) remember reading somewhere.
Picture possibly a left-over from a prototype or pre-production Engine?

I'll be removing my Sump when I do the Thermostat mod, I want to put another temp Sensor in there, to compare with the readings I'm getting from the current set-up.
OilTempSender1.webp
OilTempSender3.webp
 
Back to Thermostats for a moment.
In the Stelvio (and Norge/Sport) Manuals, there is this pic . . .

It's not shown in the Griso version, nor is it mentioned in the text for the Oil System Description.

I have a vague recollection of reading something about this not long after I bought my Stelly (Oct/Nov 2015?).

Anyone know if it is fitted?

That sump spacer is used in the 2V Lemans, Sport and 4V Centauro. That thermostat was used in those bike, and altered the flow to where the cooler was attached. It might apply to the 2V Griso with the cooler attached to the sump spacer. Even if it was in the 8V Stevio sump, it wouldn't do anything, since it is for the sump spacer attached cooler. The 8V motors have the cooler attached almost directly to the cooler pump. Probably no good place in the motor for a thermostat. I still can't believe there is no thermostat in the cooler itself or somewhere.
 
. . . I still can't believe there is no thermostat in the cooler itself or somewhere.
Definitely isn't, it's inexcusable really for a big Air/Oil-Cooled Engine.
I'm going to make a Thermostat Unit for mine, plenty of room externally to mount one, then I can do away with my mouse-mat Cooler Cover!
CoolerCover.webp
 
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