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griso info

Fran Kelleher

Just got it firing!
Joined
Nov 5, 2018
Messages
8
Location
Ireland
can somebody educate me on the cam issues of the earlier 8 cam engines & when this was sorted. Are the tappets lock nut & screw or shims. Mine is a 2016 model and I want to keep it right. Also where is the best place in the uk to get some parts & accessories. I am a mechanic and will be doing all the work myself
 
If I'm wrong, I hope someone will correct me.

The cam problem was sorted by 2016, so your safe. Think it was 2012 when they started correcting the issue.

The lifters have a DLC (diamond like coating) that fails from the cam constantly impacting the lifter face. Once it fails maintaining the clearances will be impossible.
The update replaces the cambox assembly, with new cam and roller lifters.

The valves are screw and locknut.
 
As I recall, they started using the roller lifters sometime back in 2012. So you should, as mentioned, be fine. But you can actually see when you remove the valve covers that there are roller lifters hidden in the heads.
The DLC coating was a feeble attempt to fix a design issue with the flat tappets, and it failed horribly. DLC coatings on tappets can be a good thing, for example with the Aprilia XV motor the switch to a DLC coating was a good thing. But a DLC coating isn't going to fix a problem caused by bad design. They got something wrong, personally I suspect it had to do with the valve spring rates being too high. They went from tappets that had a single valve spring pushing back on them to tappets that had two valve springs pushing back on them, so they had to adjust the spring rates used. The two smaller valves per side / tappet should have had two smaller springs to go with them. But it may be that Guzzi did not reduce the rate of the smaller springs enough to keep the tappets happy. Guzzi has made similar errors in the past.
 
Many thanks for this info. On another note, I am looking for a more upright riding position on my griso as it is killing my hips. What are the options for lower footpegs & higher bars or risers. While I am at it also a small fairing to break the wind. Does anyone have any of this gear for sale
 
Many thanks for this info. On another note, I am looking for a more upright riding position on my griso as it is killing my hips. What are the options for lower footpegs & higher bars or risers. While I am at it also a small fairing to break the wind. Does anyone have any of this gear for sale
Google Knight Designs for pegs. I used to sell them. 1” drop is max for the least complexity.

I sell bar risers and/or the Tour bars below - either fit with no cable/line issues.
https://gtmotocycles.com/products/gt-rx-cnc-bar-risers
https://gtmotocycles.com/products/lsl-handlebars-tourbars
 
Many thanks for this info. On another note, I am looking for a more upright riding position on my griso as it is killing my hips. What are the options for lower footpegs & higher bars or risers. While I am at it also a small fairing to break the wind. Does anyone have any of this gear for sale
Why not make the peg lowers yourself ? I did this 3 yrs ago for long distance riding and 1 inch drop made all the difference for comfort - no other changes were needed. IMG 1903 IMG 1904
 
Hi Hugh
Many thanks for reply, they look great. How did you make them? You must have access to a milling machine or some other machine shop equipment
 
No special equipment just good quality alluminium billet , hacksaw/file/drill and old hangers from an 1100 sporti.
 
Thank you guys for all the info, I have fitted handlebar risers, made similar lowered pegs & fitted a small Puig wind deflector which all made a big difference particularly on long journeys.

I have one more question.
I have just fitted a GT-Rx CNC Givi Tanklock Bag ring to my bike. My concern is that the filler cap sits a bit higher and requires a good pull down on the four allen bolts to hopefully seal it against the rubber seal compared to standard. I am worried that it is putting undue stress on the tank/mounting threads and also concerned that if it is not fully seated could allow water to get in to the tank particularly when washing the bike. Has anybody fitted one of these to a a 2016 Griso SE and had any issues

Any advise greatly appreciated
Fran Kelleher
 
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