Attached Data from my Crank Balance in 2019 for the Golden Flash as promised. Sorry I had to save it in pdf format to get it to attach. My Spreadsheet is in xlxs format. How do I change this to an acceptable format?
IMD and Hepolite Piston weights are detailed. The IMD are considerably lighter, which suited me fine, as I already had too many holes drilled in the flywheel and Balance Factor with the Hepolites would have been higher than I wanted.
The IMD's gave me BF = 59. (Note 54 for standard, 65+ for racing)
Note - mentioned are Priory Gudgeon Pins (from Priory Magnetos) with the Hepolite Pistons. I had purchased them in the hope that I could re-use the old Hepolites as the old Hepolite Gudgeons had been badly damaged by some ham-fisted operator, so calculated the BF with Priory Gudgeons - not used obviously.
The quality of the IMDs is impressive, and the clearances are spot-on. Hair Dryer used to get the gudgeons to slide into the pistons nicely - no go without heat. Even used the hair dryer to install the gudgeons in the small ends. They would go in without heat, but would have needed some light tapping.
Cheers
Col