I installed a 996sps 66mm stroke crank into my 998s 3 years back making it 1027cc. This engine now lives in an old 888 strada
I had issues with a 1026 using ti-rods. I had to machine the cases as the rod bolts were hitting the cases. The jack shaft had to be cylindrical ground by 1mm in diameter to clear too.
Stroked a 748r to 772cc and that had belt tension issues. The rollers needed to be made smaller in diameter.
This week im stroking a 06 999r to 1079cc. Thats 998 crank installed. Custom 2.5mm base plates and again the rollers need to be cylindrical ground smaller then cam timing re-set.
A question why go back to the old motor. I thought you had a 998r with be-faster heads that you just bought
__________________
life is work
For Ducati engine blueprinting/crank balancing/performance cylinderhead worx-
www.cjsracing.co.uk
For spot on dyno-tuning ,mapping, custom eproms-
www.hypertrick.net coming soon..