Moto Guzzi V100 Sport Tourer: water cooled, 120 HP (26th of August 2021)

[p6x]

 

[LowRyter]

Whichever bikes are "better", the spineframes win the beauty contest.  

[pete roper]

Service manuals are out. Full of interesting info. Lots of wailing and gnashing of teeth from the 'Old School' boys about having to take the cams out to change the valve clearances.

[audiomick]

52 minutes ago, pete roper said:

...wailing and gnashing of teeth from the 'Old School' boys about having to take the cams out to change the valve clearances.

Yes, there's been some of that in the German language forums too. And about the cylinders being part of the same casting as the block, and a few other things. All of which are apparently par for the course in modern motors. Since a couple of decades.

[80CX100]

1 hour ago, pete roper said:

Service manuals are out. Full of interesting info. Lots of wailing and gnashing of teeth from the 'Old School' boys about having to take the cams out to change the valve clearances.

I take it by that comment that it's a bucket & shim setup,,, mea culpa,,,I'd be in the wailing and gnashing of teeth group

I realize it's a more precise and long term stable adjustment once done,but for a home mechanic living far away from a shop with a supply of shims;that was a job I grew to detest. Major pita

[pete roper]

1 hour ago, 80CX100 said:

I take it by that comment that it's a bucket & shim setup,,, mea culpa,,,I'd be in the wailing and gnashing of teeth group

I realize it's a more precise and long term stable adjustment once done,but for a home mechanic living far away from a shop with a supply of shims;that was a job I grew to detest. Major pita

Nope, finger rockers.

[audiomick]

There are shims in there, apparently. Or spacers or whatever you like to call them.

Look here, page 42, part #1. They call it a "pad", which I suspect is a poor translation.

https://www.af1racing.com/ProdImages/st3/GUV100.pdf

In the parts list on the lower part of the page one can see that the part is available in various thicknesses.

From here,

https://www.motociclismo.es/fotos-motor-moto-guzzi-100-mandello_69296_113/11311934.html

this photo from about the middle of the series shows the top of the valve springs, and there one can see the depression in which the "pads" sit.

https://www.motociclismo.es/uploads/s1/11/31/19/36/moto-guzzi-v-100-motor-detalles-19_1_1000x575.jpeg

[al_roethlisberger]

This V100 has been growing on me, especially the green one with gold rims 

 

But yes, I think it would be wise to give it a year or two to shake out early production issues, and also see what other models are forthcoming based upon this platform.

 

One immediate opportunity I see is a front fender extender.  I watched a review video where the entire front of the engine and radiator were covered in dirt 

[pete roper]

4 hours ago, audiomick said:

There are shims in there, apparently. Or spacers or whatever you like to call them.

Look here, page 42, part #1. They call it a "pad", which I suspect is a poor translation.

https://www.af1racing.com/ProdImages/st3/GUV100.pdf

In the parts list on the lower part of the page one can see that the part is available in various thicknesses.

From here,

https://www.motociclismo.es/fotos-motor-moto-guzzi-100-mandello_69296_113/11311934.html

this photo from about the middle of the series shows the top of the valve springs, and there one can see the depression in which the "pads" sit.

https://www.motociclismo.es/uploads/s1/11/31/19/36/moto-guzzi-v-100-motor-detalles-19_1_1000x575.jpeg

Yes, it has shims, but no buckets. There are *arms* commonly known as 'Finger Rockers' that pivot beside the valve spring and go between the cam lobe and the top of the valve on which the shim resides. Biggest advantage over buckets I can see is lack of reciprocating mass in the valve train.

[Pressureangle]

9 hours ago, pete roper said:

Yes, it has shims, but no buckets. There are *arms* commonly known as 'Finger Rockers' that pivot beside the valve spring and go between the cam lobe and the top of the valve on which the shim resides. Biggest advantage over buckets I can see is lack of reciprocating mass in the valve train.

My '68 Ducati Jupiter used valve caps for clearance adjustment. I still have some around. A PITA until I made a tool to depress the valve spring retainer down in situ.

[audiomick]

4 hours ago, Pressureangle said:

...a tool to depress the valve spring retainer down in situ.

Yes, a mate of mine in Melbourne had one for the Kawasaki Z motors (the original, real ones....). Made the job very simple.

 

I fully expect that clever people will make such a tool for the V100 in fairly short order too.

 

Chuck, are you reading this?

[Pressureangle]

33 minutes ago, audiomick said:

Yes, a mate of mine in Melbourne had one for the Kawasaki Z motors (the original, real ones....). Made the job very simple.

 

I fully expect that clever people will make such a tool for the V100 in fairly short order too.

 

Chuck, are you reading this?

[pete roper]

It's a very different system. The early Japanese systems used a shim on a bucket. There was nothing blocking shim acces apart from the cam lobe. With this system there is the finger rocker that has to be got out of the way.

 

I can't see why people are so worried about taking the cams out?

[docc]

1 hour ago, pete roper said:

It's a very different system. The early Japanese systems used a shim on a bucket. There was nothing blocking shim acces apart from the cam lobe. With this system there is the finger rocker that has to be got out of the way.

 

I can't see why people are so worried about taking the cams out?

The difference between eating an apple and eating a banana. 
 

The damn banana has to be peeled first . . . 

[audiomick]

3 hours ago, pete roper said:

... taking the cams out?

I'll take the liberty of paraphrasing something that lucky phil wrote in the german language forum that I am involved in:

He suggested that it might be possible to get at the shims without having to take out the cams.

Going by the drawing here on page 46, part #21 (look at the left side of the drawing. They got the numbers 20 and 21 mixed up on the right side. )

https://www.af1racing.com/ProdImages/st3/GUV100.pdf

and from here (I linked this further up...)

https://www.motociclismo.es/fotos-motor-moto-guzzi-100-mandello_69296_113/11312012.html

this photo

it looks like it should be possible, with the motor at the compression (combustion) TDC, to remove the c-clip (part #21), pull the shaft that the finger rockers are on, and lift the rockers to get to the shim.

Seems plausible to me.