STL SmallBore Blog post: MiniMoto Series
Engine Modification Classes
System for referencing common engine upgrades for 125cc Honda MiniMoto’s
Stage 1: (Stock Bore 125cc)
Stage1/Tier1 (S1T1) - Intake, Exhaust, and Tune.
Stage1/Tier2 (S1T2) - S1T1 + Camshaft.
Stage1/Tier3 (S1T3) - S1T2 + High Compression Piston.
Stage1/Tier4 (S1T4) - AKA “Super125” - S1T3 + Race head (Ported and/or Big valves, intake, injector, etc.)
Stage 2: Medium Bore Kits - (intake / exhaust / tune is assumed for this stage)
Stage2/Tier1 (S2T1) - 150cc or less big bore kit
Stage2/Tier2 (S2T2) - S2T1 + Camshaft
Stage2/Tier3 (S2T3) - AKA “Super###” - S2T2 + Race Head (Ported and/or Big valves, intake, injector, etc.)
Stage 3: Big Bore Kits - (intake / exhaust / tune / supporting modifications are assumed for this stage)
Stage3/Tier1 (S3T1) - 2 Valve BBK
Stage3/Tier2 (S3T2) - 4 Valve BBK
Stage3/Tier3 (S3T3) - DOHC BBK
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- TJ (STL Smallbore) Dec, 2021