A swissauto250 VT4 engine is upgradable to the following configurations:
EFI VT1 - 40hp version.
Necessary changes: software, EFI “plug-and-play” injection kit, remove exhaust restrictor
VT1 - 35hp carburetor version.
Necessary changes: software, 30mm carburetor, remove exhaust restrictor
VT2 - 28hp carburetor version.
Necessary changes: software, 30mm carburetor, air restrictor, remove exhaust restrictor
EFI VT3 - 27,5hp version.
Necessary changes: software, EFI “plug-and-play” injection kit, inlet restrictor,
remove exhaust restrictor
VT3 - 24hp carburetor version.
Necessary changes: software, inlet manifold (unrestricted)
Oil service.
Every raceday 0,6 liter 0W-30 ZDDP rich engine oil
Small service - SP15
After 25 hours
(Not necessary if HQ valve springs are used; standard since 2015)
Main service - SP45
After 75 hours or 1 racing season
swissauto250 VT4
