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It's worth bearing in mind that you can't as a general principle translate everything in engineering across all installations and applications. What works perfectly fine in one application can have issues and problems in another. From my sketchy memory gears weren't favoured by NASCAR engine builders because in the operating envelope they ran at harmonic vibrations were an issue with gear driven cams. Chain driven cams dampened this out. Remember though this is/was pushing an original design to it's limits and a lack of rigidity in cranks combined with sustained high rpm introduced it's own issues unique to those engines. It's what makes engineering interesting and challenging and keeps designers awake at night. It worked here on that, so it "should" be ok on this, then it turns out it's not and back to the drawing board, testing and investigating. Rolls Royce engineers and designers spent 5 years of the war on a merry go round like this developing the Merlin and Griffon engines among others. Quite often it was a minor modification required or a materials change and the issue was solved. Ciao

If the spring is broken, the only way to get the shifter to "return" is to decelerate, which causes the internal shift arm to flop back into place, which will give you one shift. If you're saying the lever "returns" and you can shift more than once, then it's not the spring (yet). It's most likely the linkage (per Docc's post above).

When I did the timing chain and installed the Valtec tensioner on my CX100 it only had 24k miles on it, but it was loose and sloppy enough to have started to wear inside the case. You could really feel a difference in how much tighter and uniform the whole ignition timing/firing system was. fwiw

Euro fairing................. yummy and rare.

Caught me not paying attention again !! What have my beloved politicians done while I was napping this time?

The combination of Scud's ChuckSuperSpring and LuckyPhil's Shift Improvement is stellar, as well as an extended shift arm. Grooming, adjusting, and greasing the foot pedal pivot bolt and the entire rear-set shift mechanism is definitely the place to start. The pivot bolt has a lock nut that allows it to be set for a bit of freeplay for the shifter , but not too loose. Make certain the pinch bolt on the gearbox arm is tight as are the lock nuts to the Heim/Rose joints. Adjust the connecting rod length so the pedal does not strike the frame side plate on the downstroke and the arms are parallel: If you take the side plate off for the spring and shift improvement, change the detent follower on the index wheel. Mine was notchy enough to cause stuck lever repeatedly, just like your symptoms. +1 with Steve S that a broken spring doesn't let the lever just pop back up and resume play.

Absolutely. Not being naturally mechanically inclined, I research every job I do, ad nauseum. I had read many times on the difficulty of getting the new Valtec tensioner into proper position and that it was tough, it wouldn't break, just force it into place. I proved that theory wrong and the brittle plastic broke right at the metal support/pivot post, and I had to order a replacement. I think I was lucky that it broke right before my eyes and I had a chance to correct the problem with a new one. More gently installed the 2nd time, by disassembling it, and reassembling it in proper position. I've subsequently read of a catastrophic engine failure due to the Valtec breaking apart, hidden out of view; I'm sure that the point of failure was at the same stress point, but if it cracks during installation and you don't realize it, you can pay a high price later on for an obvious weak spot in the design. fwiw ymmv

If I had to pick one engine that contributed to defeating Germany in WWII it would be the Merlin. RR's policy under Hive's was to focus resources on development of what they knew worked, then gradually "stretch" the design. Supercharger and associated gearing being the main focus, but many many others. That's why the Griffon was so late and the Crecy never happened. From what I've read RR policy with new engines was to stick them onto the test stand run them till they broke, then take them apart fix it and run 'em again till they broke...........ad nauseum. IMHO it was brilliant leadership and vision, should Germany have developed the same strategy the allies might have been in a lot more trouble than they already were. I'm in total agreement with Phil and everything he stated in the post above To Joe's gears, got them in my LM 1000, Sport 1100i and HiCam, was it @Pressureangle who stated he felt the engine ran better? I'm of the same opinion. Valtec tensioners can have their problems too, but at the end of the day we just all weigh up the pros and cons of each offering and decide what suits us as individuals best

It's all geometry docc. That's why there's a practical limit to the capacity of a traditional flat plane crank 4 cylinder engine before you need balance shafts. It's generally around the 2.0 litre mark give or take. Doesn't mean you can't have a 2.5 4 cylinder engine without a pair of balance shafts turning at 2X engine speeds but the secondaries get a bit much for a DD. Some engines don't need the cam drive dampers such as VFR Hondas and MV Agustas and the Guzzi. Ciao

Thank you for the suggestions I will check out linkage first

Well who ever they are.................. have a shit load of work and lies to perform from now till then. Again........... just do your home work folks. Stinson out

Something recently happened in Tennessee? I must have slept through it . . .

Once shifter "returns" it shifts fine, happened 3 different times yesterday so I agree it shouldn't be broke. Course I'm new to V11, only other MG I've had was a 1200 Sport and I resolved all its idiosyncrasies over time. Think I will check shifter linkage and clean lube first, I really don't want to pull the cover.

Harmonic vibrations... Had no visual comprehension on how an engine created these - I guess I just kinda assumed it was produced by the combustion bangs💥 ...turns out it’s more related to the stroke travel speed differentials! Amazing F1 in-depth explanation in 1st half of this vid (the 2nd half is pure tech-sex!) just learned me! But... it’s in the noggin’ now!

It’s not a broken spring or it wouldn’t shift at all, more likely the eccentric shaft needs adjustment but also fit Scuds spring while you’re there

It does sound like a broken pawl spring. I had a bunch of the re-engineered "unbreakable" springs made. Still selling them for $10 each plus shipping. Sending you a private message now. It's a good time to polish up the contact surfaces as detailed in Phil's thread above. There were also a few batches of extended shift arms made - but not sure if any are currently available. That arm is easy to replace - you can fix the spring now, and do the arm whenever it suits you.

I also agree that this is the reason for the spark scatter at idle. The frontmost cam on the shaft is the last one to be active and therefore can rotate "back" when the follower is over the nose of the lobe. In fact it does not rotate back but shaft rotation ist slower before and faster after passing the top of the lobe. On old engines driven for a long time with chain slack, you can see a flat on the front cam... This is not just a theory, it can be proven - install a valtec type chain tensioner and check spark scatter with a timing light - you will see it disappeared compared with the slacky stock tensioner.

I did not know that CMS-NL has parts for our V11! That is great news! They do not show Moto Guzzi or the V11 in their searches, but I entered the part number for the 2002 jewelled lamp panel and it brought up a page. "Expect up to six weeks delivery" usually means they are hoping to get it from the factory . . . https://www.cmsnl.com/products/lamp-panel_pggu02781101/

if it had eagle valve stem caps

Apparently, the British government voted it in July this year. 2035 for Motorcycles, 2030 for cars. As a side note, in Europe, July and August are traditionally the months when people are on vacation. It is not unusual for governments there, to vote on bills while nobody is attentive. I have not done due diligence to verify this information, I don't know if it is confirmed or not. All I know, is that a law already existed that set the end of ICE powered cars in 2045. The current administration simply pushed up the dates. Things can change again, nothing is cast in stone as they say. Installing Echarging stations in lieu of Gas ones implies to have an adequate power grid. So far, Motorcycles had been left out, but I expect the British decision, if confirmed, could attract some attention. If I am correct the EU has set laws of its own, but so far, the motorcycles have been left out. We can expect this will change in the future. If I was the CEO of a motorcycle company, we are almost in 2022, I would certainly be wary of making major investments. Usually mid term vision is 5 years, but there is no telling what can happen. Some of our motorbikes could still be usable. I think Germany has an exemption in place for vehicles 30 years and older. Will that be the exception or the rule? Maybe we should anticipate our purchases of new/old bikes and not wait for models that may never come out? it seemed to me so obvious that Piaggio would use the new Moto Guzzi V100 engine to release newer iterations of older favorites, such as the Le Mans. Will this still happen? I don't see the USA embarking into this crusade just now, but we have all seen what happened recently in Tennessee; largely attributed to the unusual warm weather. What is your opinion about purchasing new vehicles? Personally, I am not planning to purchase any new four wheeled vehicles in the future. This was a decision that I had taken after my last acquisition in 2016. I had decided it was going to be the last "new" purchase. Next purchases would only be "used". I don't know for motorcycles though. What about you?

More crappy gears by -convertpervert- More crappy gears by -convertpervert- More crappy gears by -convertpervert- image by -convertpervert- from Joe's munt pile. image by -convertpervert- image by -convertpervert- Bad gears by -convertpervert- broken gears8 by -convertpervert- Ago gears2 by -convertpervert- timinggears1_sm_sm by -convertpervert- broken gears 7 by -convertpervert- broken gears6 by -convertpervert- broken gears5 by -convertpervert- broken gears4 by -convertpervert- broken gears3 by -convertpervert- and some of the results. broken gears9 by -convertpervert- image by -convertpervert- image by -convertpervert- Alu G 005 by -convertpervert- Yeah, I've got a load more. I'm not willing to argue the point with anyone, there is no point. sorry for not cutting off the extraneous bits of the photo links, I can't be arsed.