Keeping my S2R 800 going and healthy. Winter small things, again ...

[stopintime]

 

Heads: valve seats refurbished, valves refurbished, one valve guide drilled and put in sleeve, seals replaced, cams saved, five rockers replaced

Cylinders: another 20-30,000 km of life left. New nicasil or something else....

Pistons: no cracks, all rings good, compression test good

Crank and rods: good

Gear box: output shaft replaced because of wear under the sprocket, gears a little worn
 
Cases replaced: crack by the belt drive, crack at front right motor mount

Starter 'clutch': spinning a little, replaced

Runs: ~10 degrees C hotter, 10% better mileage


Issues: not-perfect intake port & polish rom previous builder holds it back, oil leak rear right cylinder vs cases (the usual place)(plugged, but still leaks)(updates to follow)

[koko64]

 

[koko64]

All finished? Dyno results?

[stopintime]

All finished? Dyno results?

What do mean? "Finished"?

Back to the ~99 "Ducati calculated" bhp.

[koko64]

 

[Charlie98]

What year bike is that?  ~120,000 miles?  Nice!

[stopintime]

What year bike is that?  ~120,000 miles?  Nice!

2007

Some of it is older and some of it is newer, but very little is original.

[Duck-Stew]

I don’t know if Ducati has changed the 797 engine over to the plain beatings yet, but that could be a modification / upgrade if you care to next time...

[Charlie98]

Are cracked engine mounts common on the high mileage bikes?

[stopintime]

I don’t know if Ducati has changed the 797 engine over to the plain beatings yet, but that could be a modification / upgrade if you care to next time...

Plain bearings.... where?

Are cracked engine mounts common on the high mileage bikes?

Not to my knowledge, but this might be connected to a big track highsider. All engines will crack sooner or later, so old age might be the reason...

The more common crack area is behind the belt drive shaft / front of main bearing.

[Duck-Stew]

I know the plain bearing cranks started with the 821 back in like ‘15.  They’re slowly converting the engines to plain bearings.  I’m not sure if that process has trickled down to the 797 engines yet.  Which is also the same engine as the Scrambler 800...  Just wanted you to have options & maybe a more reliable engine and/or a couple more HP.

[koko64]

What do mean? "Finished"?

Repair Job completed, or Project completed?

[stopintime]

Repair Job completed, or Project completed?

Never finished.

Not even job complete when there is an oil leak.

 

[koko64]

I think it's time for an 1100Evo motor😎.

[scaudill]

Duck-Stew
Are you saying the crank main bearings are now sleeve type (bottom end rod bearings?  Does that reduce friction?  I can see the weight savings.  I presume the insert would be a full circle not 1/2 like rod bearing inserts.
Thanks,  Sterling