Third time

[Blower]

Update:

Engine run fine through whole riding season. Only issue was piston slap when the engine was cold. Finally it was difficult to get the engine
temp high enough to keep piston slap away. E85 fuel is good "cooler".
I did not want switch back to gasoline, so I made a new big block and this time with JE 1327 pistons.
When the first big block was with 0.004" piston to wall clearance, the second is made with 0.002".
Now the engine is as quiet as old air cooled engine with lock up clutch can be.

Boring stock 1150 block for bigger sleeves:


Block & 1127 liners:


Pistons coated with MoS2 paint:

 

[Blower]

The 2013 riding season ends too early because of the clanking noise from the engine.
Few months ago I get that noise maker crankshaft back from service (it?s good to have inspected, repaired, trued & welded spare crankshaft).

Here is the reason for the odd noises:

 

[Blower]

Long time no update, so:

Running in with the new pistons and cylinders are done and engine is working good.

Last saturday I was dynotuning my bike on LV Racing dyno. After some finetuning of afr and ignition the results was
209,7 hp and 181,3 Nm from rear wheel. A slightly more than last year, but nicer torque "line"

 

[2BRacing]

Very good figures! Excellent work, well done!

I have never seen that wear pattern on a crankshaft like in your photo above. What caused it, and can you explain to me why the wear marks only go across the journal and not all the way around it?

 

[Blower]

Very good figures! Excellent work, well done!

I have never seen that wear pattern on a crankshaft like in your photo above. What caused it, and can you explain to me why the wear marks only go across the journal and not all the way around it?

According to the man who repaired the crankshaft, Old engines use to have sludge in the crank web groove from where the oil is forced by centrifugal force in the big end bearing. When this sluge looses, it can block
the oil hole and/or damage the big end bearing rollers, races or journals.
This kind of damages what can be seen on the picture is quite normal on roller bearings. The damage usually starts on the oil hole edges.

 

[GS1150Pilot]

I love that bike-and your skills in building it.

 

[ShadowFocus603]

210bhp mmmmmmm. I bet that is a white knuckle pure adrenaline ride from hell.