A swissauto250 EFI VT1 engine is downgradable to the following configurations:
VT1 - 35hp carburetor version.
Necessary changes: software, 30mm carburetor, vacuum fuel-pump
VT2 - 28hp carburetor version.
Necessary changes: software, 30mm carburetor, air restrictor, vacuum fuel-pump
EFI VT3 - 27,5hp version.
Necessary changes: software, inlet restrictor
VT3 - 24hp carburetor version.
Necessary changes: software, VT3 “plug-and-play” carburetor kit, vacuum fuel-pump
VT4 - 15hp carburetor version.
Necessary changes: software, VT4 “plug-and-play” carburetor kit, vacuum fuel-pump
Oil service.
Every raceday 0,6 liter 0W-30 ZDDP rich engine oil
Small service - SP15
After 15 hours
(Not necessary if HQ valve springs are used; standard since 2015)
Main service - SP45
After 45 hours or 1 racing season
swissauto250 EFI VT1