|
Assuming you have R1100 engine cases, to fit R1150 cylinders, you will need to have 1mm machined off the skirts that go into the engine cases. Your machinist needs to use soft chuck jaws to avoid ruining the Nikasil the rings ride on and seal against.
On the pistons, IF you are running stock valves, you can run stock R1150 pistons or aftermarket (i.e. SJBMW pistons). IF you are running larger valves, do NOT use stock pistons, go with the aftermarket pistons. I don't know if Chris (SJBMW) has anymore of these pistons but they are nice looking Venolias and his service has been excellent. I have a set but I'm using mine. I didn't cc them but they look to be 12:1 to 12.5:1 range. I don't know what RT pistons are but I doubt they are more than 11:1. Perhaps someone else on the forum will know what's available from stock pistons.
Good luck.
__________________
BMW R1150sR - Project Touring Bike
Ducati Hyperstrada - Mountain Road Slayer
Porsche 914-6 Vintage Race Car
Porsche 944 S3S (S3 Studie)
|