Cylinder interchangeability?

[jorgens]

Hi all, my name is Jørgen, and I`m a newbie here. I`m trying to fix my sons broken XS. I pulled the head and cylinder off, and found a crack in one of the liners, and that explains all of his troubles...
So, this is a 81`but are the cylinders from earlier years interchangeable? If no, what are the differences?

Thank you in advance!

Br
Jørgen
Norway

 

[Bushyeyed1]

All the cylinders are the same to my knowledge. I believe the head is the only thing that changed. What year is the replacement cylinder? You can also just replace the sleeves.

 

[TwoManyXS1Bs]

Don't use '70 - '71 cylinders.
They have a chain tunnel bridge that won't allow later camchain tensioners.
They also use only 4 bolt tensioners...

 

[jorgens]

So that means that all 6 bolt tensioner cylinders will fit the 81' block and head?

br
Jørgen

 

[grizld1]

Correct: any cylinders from 1972 (XS2) forward will work. In addition to different screw count in the cam chain tensioner mounting, the head gasket surface on XS1 and XS1B cylinders was narrower than on the later version.

 

[jorgens]

Great info, just what I needed, thanks!

jørgen

 

[Jan_P]

Hi
It is Probably right ( More than Probably ) the answers here
But there are two different connecting rods in Europe perhaps even three
533 and 437
I cant remember exactly but I believe it is the pistons that are different.
If you look at the engine in front.
There is an engine number stamped.
With that number you can find out what you have

http://www.xs650.com/threads/id-your-model.42/

Then you can internet check what parts with number are in that engine.
And for the repair when parts are up for sale .You can google that part number on a Yamaha parts site
and see if you have the same part in your engine.
That time checking can be well spent time. And save some money if used parts are going in.

I have no experience about it and a replacement cylinder is perhaps the best way to go forward
But there are folks that changes sleeves '

http://www.xs650.com/threads/replacing-cylinder-sleeves.6263/

 

[Boog]

Hello Jørgen and welcome from Virginia.

Please do let us know how you fix the issue and include picture too.

 

[jorgens]

Still have not received it- will post when i get it

 

[TwoManyXS1Bs]

Just some reference info.

An early 70-71 cylinder.
Notice the camchain tunnel bridge, and the 4-bolt tensioner mount.


And, 72-on cylinders.
Notice the wider deck with sealing grooving.
(Pics courtesy of Mailman)


And, a good read on Mailman's cylinder adventures,
From his XS2 restoration bible.

Posts #727 to #816, and maybe beyond that...

http://www.xs650.com/threads/mailman’s-xs2-a-full-on-restoration.51520/page-37#post-552930