Maybe they oil down their engines when they’re done racing.
Maybe it’s the way they shut down. If you rev it then cut it quick it will not load up with oil, if you let it wind down slow and die it will have a bunch of oil in it on start up.
Can you keep pace with them? Maybe they have to be richer because they’re pushing hard.
BTW, Klotz Super Techniplate is 20% castor.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience