I have been witness a few times (three of my of Rally race bike, this guys can get you good 15% 20% with their full valve treatment (5000Euros Easy)
as a joke a few dutch friends convince my to buy a Sidecar motocross engine [With a 52mm Keirin FCR flatslide, hand made of course) base on the old KTM660, POS's almost 80horses on cheap gas at 10.000 feet elevation, it was impossible to not do a burn out on every turn, plus 1/4turn throttle and riding standing using brakes was absolutely Impossible
THey use to do it all by hand with Foredoms, now everything is 5 axis CNC
https://patineto.smugmug.com/Motorcycles/n-DQLRX/Cutting-edge-engine-work/Flow-bench-master-pieces/
as a joke a few dutch friends convince my to buy a Sidecar motocross engine [With a 52mm Keirin FCR flatslide, hand made of course) base on the old KTM660, POS's almost 80horses on cheap gas at 10.000 feet elevation, it was impossible to not do a burn out on every turn, plus 1/4turn throttle and riding standing using brakes was absolutely Impossible
THey use to do it all by hand with Foredoms, now everything is 5 axis CNC
https://patineto.smugmug.com/Motorcycles/n-DQLRX/Cutting-edge-engine-work/Flow-bench-master-pieces/
