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So yesterday evening I confirmed it was a voltage drop which was causing the Guzzidiag disconnect. I checked the battery voltage after work and the voltage held steady throughout the day at 12.5V. I put the charger back on it and brought it to about 13.0V. I then booted up Guzzidiag, connected, started the engine, and the connection held! After I got the bike up to temperature I was able to adjust the CO trim. It was initially set to -50. I tried a few small adjustments of increasing by 5 at a time. The frustrating thing was that Guzzidiag is forcing me to exit the program after each adjustment. It won't let me make multiple changes to the CO trim without first closing the program, shutting off the bike, reopening the program, restart the bike, and then make the next adjustment. Oh well, just a minor inconvenience. I decided to just go finish with a CO trim setting of -5. After that I went for a ride and HOT DAMN is that throttle smooth!! I am now about 3/4 of the way through the Decent Tune up with each step making a noticeable improvement in the engine performance. Up next is the throttle body balance. After that I will probably play around with tweaking the CO trim some more and try a couple of the bin files floating around to see how they feel.

No, this is actually an exhaust vent for air control systems- they call it a muffler, as it quiets the exhaust and prevents pests from going into the system.

Just saw this as a 'whatizzit' on FB groups. I directed him here, of course.

Yeah on my previous build i I put in a 180 and it messed up the profile. Thank you for clearing this up. It is becoming harder and harder to source lightweight wheels. im working on a prototype adaptor to use single sided wheels. We were able to successfully adapt MV Agusta and Ducati wheels but it took a lot of parts, I’m trying to simplify it, but it will take time, in the meantime I’ll throw a 2003, 5.5 wheel.

So this is how the top plug looks like stock? I can see it is opened to the atmosphere, the mesh should suffice to prevent oil from coming out. Unless of course a passage in mud plugs it. But this plug would defeat the purpose to run a long unaesthetic tube from the plug to the rear of the engine.

Leave it here. The thread is running a bit like a conversation in front of "the Garage" over a quiet beer. Given that the topic has roved from Quotas over V11 und back to Quota, I reckon it is a bit more general even than the "Older Models" section.

Remembering the past so you will not repeat it again . After my heart operation , my memory is about like Leanord in the movie Memento ! with that being said , I can remember my F-ups !

I tried an idea on my V11 to both reduce any chance of water ingress and reduce unsprung weight. An alloy vent plug with an oil trap, and a short hose with a foam filter. No oil leaks or water, but then there wasn't any before I started either.

One thing being overlooked here is that the various bevelboxes are different and most 'Vent' differently. On Loops, Tonti's and the Quota the pinion and its bearings aren't sealed. This means that theoretically the air in the box will vent through the bearings and into the swingarm and thence through the splines of the shaft and universal joint into the UJ housing where any 'Pressure' will simply cause the boot between the swingarm and gearbox to swell a bit. There is also that the extra volume of the swingarm etc. means that the pressure rise is proportionally low. We'll come back to this. On the early Spineframes, Daytonas, Sport 1100's and Centy's what was essentially the same bevelbox was used but due to the shaft not being enclosed the pinion was sealed. On these boxes though the factory never fitted a breather and consequently seal failures due to pressurisation issues are fairly common, not helped by the sealing surface at the pinion being exposed to water, grime and not being rust proofed in any way! When the V11 series arrived they'd had enough time to have a think about it and coupled with changed internal ratios in both gear and bevelbox the sealing mechanism and pinion bearings were redesigned and improved and a breather was added to the bevelbox that was also enlarged to take more oil and greater volume. One of the biggest problems with the V11 series breather set ups is actually on the gearbox where some genius in the design department put it in the centreline of the gearbox directly in line with the spray line from the rear tyre when it's wet! With no hugger or spray protection riding in rain can and does result in the gearbox filling up with water! Later still the CARC bikes have another system where the pinion is sealed but because the entire bevel gear system sits within a reactive bridge with the bevelbox casing as well as the pinion being sealed there is another 'Rubber' boot that seals the front of the box ensuring the interior of the swingarm remains 'Dry'. The CARC bevelboxes have a breather at the front of the bevelbox case above the pinion bearing part of the reactive bridge. It too is prone to water intrusion from wheel spray but, inexplicably, not on all bikes! The only reason I can think of is different spray patterns from tyres with differing sipage! Anyway, a remote breather to replace the shitty little 'Top Hat' breather is commonplace on CARC bikes. I in fact designed and marketed a very neat and unobtrusive system for the CARC early on but, as you would expect from Guzzi owners, they whined and complained that it was 'Too Expensive' so nowadays most people just use a banjo and a length of braided hose run up the swingarm and up near the airbox to allow the box to vent without the risk of water intrusion. Cali 14's, V85's and other Smallblocks all have sealed pinions and breathers. To return briefly to the subject of Quotas, (And others with the early *Unsealed* pinion bearings.) the thing is that although in theory the box should be able to vent through the bearings into the swingarm reality is such that sometimes, for whatever reason, the box will pressurise and the seal/s pop. I've experienced it myself with weeping seals that when you push in the seal hook to extract them you get a hiss of escaping air! Far more than you would expect if the full volume of the swingarm etc was available for expansion. Anyway the 'Why?' Is by the by but I'd think that the reason why the Quota in question has the breather fitted is because it's one of these *Inconvenient* pressure prone boxes. You could always remove it, get the box good and hot and then 'Burp' it and see if it has excess pressure. If it doesn't? Leave it be. If it hisses at you? Reinstall the breather post haste!

Our V11 LeMans/Sports have an elegant breather vent on both the reardrive and the gearbox. Why not add one to your Quota reardrive and loose the "artisan" solution?

Great thread, our list of items of which to focus for long lasting miles of riding. Thankfully, I do love to tinker!