My 11,000 km Stelvio's tappets.

[You must be registered and logged in to see this image.]

And the top end had already been apart for the original 'Recall'!

Pete

that is some serious damage to the tappet in just 11,000km

Bloody glad it rained and I didn't ride it down from Bundaberg!

Damn!
You will be able to save the mill you think?

No worries, bottom end is fine. Unlike the 'Stelvio from hell' I've been trying to sort for a bloke for several months! It's fucked and it still has a 'Shop' warranty so I have to take it up to them. That's going to be fun as no doubt they'll tell me it's all my fault........

Good luck with that

I guess your NTX is the one that needs kit A?

I crossed check all the parts diagrams I have for GRiSO 8V and Stelvio a while ago and found some interesting things.

- the shim under the valve spring only appear in Stelvio parts diagrams for year 2009 - 2010, none in GRiSO parts manual over all years

- the quantity of the shims stated in the Stevio manual is 8, apparently all valves are shimmed in the factory for those dimpled heads

I think Guzzi tried to increase the valve springs preload by shimming them, hoping that it would prevent the valve float that hammers/cracking the DLC coating which you found out under the electron microscope, apparently not very successful

back to the question I raised a while ago about the use of new valve spring B013517 in heads that require kit C instead of shim under the intake valves when rollerizing. When Guzzi putting together kit C in early 2014, I believe they already have the new valve spring B013517 in the assembly line for those factory roller engines.

I think there is a reason they throw in 4 shims in kit C instead of 4 valve spring B013517 valve springs and best stick to that

Having said that, I rollerised my mate 2008 Stelvio using B013517 valve spring for the intake valves two years ago, so far so good, it may not matter at all

I have absolutely no bloody idea!

My guess is that the later valve springs are supposed to obviate the need for the shims but I really don't know.

Sorry, more later, I'm down the pub and Jude and our mates have just arrived!

Pete

Peter
Down the pub with Jude and mates just arrived.
Enjoy
Harry

these guzzi puzzles are good for insomnia nights but not in a pub

please say hi to Jude for me