Not according to the ServiceMotoGuzzi site. Mind you with typical aplomb they are telling me that Axone 6.0.4 is available for upgrade but of course the download link hasn't been put on the site:S . hy am I unsurprised?
I can't see why this is happening only to Stelvios if they are being properly maintained? I've just checked the parts list and both the Griso and the Stelvio use the same cams, the RH one is 976445 on both bikes. Now it *could* be that there was a bad batch of cams and or followers, I'd be interested to know whether these failures are occuring in any sort of sequential run or whether they are machines with very similar assembley dates?
My guess is that the tops getting knocked off the valve stems is a result of cam/tappet wear. Once the cams or tappets have worn sufficiently for the lash-cap to pop off, because the stems are so slim the adjuster is going to have a chance to 'Hook' itself on the side of the stem a it slams into the top of the valve and inflict gross sideways force. Do that a few times and I'm not surprised the tips snap off! Th odd thing in my book is that they didn't snap at the collet groove in the valve and you should be very grateful for that!!!!
One of the things I will keep repeating like some sort of demented mantra is that it is VERY important that maintenance IS actually carried out. Unlike most modern Japanese bikes, (And my Aprilia!) where valve lash adjustments are seen as almost optional it is VITAL, especially in the early period of ownership, for valve lash to checked religiously when specified. With my 8V I checked the clearances before I pressed the bike into service, they were very wide. I adjusted them to what they should be and re-checked at 800Km only to find that they had all closed right up. I adjusted them again and ran the bike until 5000km and checked em again and they had changed very little, checking AGAIN at 8,000km revealed that all change seemed to have effectively stopped. From this random sample of one :laugh: I am working on the principle that there is a fair bit of settling in of various bits and bobs in the valvetrain which hasn't been a problem for ME but if the workshop that is servicing the bike is less than scrupulous, or simply assumes that the valve lash doesn't need adjusting on a 'Modern' bike you may well end up with the clearances either too large or too small. Too large and the tappets will not begin to lift on the rampings of the cams and the tappet and opening flank will cop a flogging, too small and they may close up when the engine is hot causing the tappet to ride the base circle of the cam. either of these scenarios can have catastrophic results that manifest themselves as..... Ta-Da!!!!!! Cam and tappet failure even if the hardening is all done correctly.
Pete