In the past a .26 engine installation in a TMax required many modifications and upgrades. Now, with the OFNA/Picco 26MAX (4.27cc) engine you have the first direct .26 TMax© 2.5cc engine replacement in the industry. The Picco 26MAX uses your existing Traxass clutch assembly, manifold, pipe & EZEE-Start System. This is not a simple .21 conversion, but a real .26 engine specifically engineered as a True Direct Replacement for your T-Max engine. - ENGINE SPECIFICATIONS - CLAIMED HP 2.5 RPM 32,000 CARB TYPE SLIDE CRANK SG or SG TMAX CONSTRUCTION ABC ENGINE SIZE .26 TYPE REAR EXHAUST PORTS 5 Picco .26 MAX with Revo EZ-Start Backplate PART #51223 * MOUNTS SOLD SEPARATELY Picco .26 MAX with Pull Start PART #51224 * MOUNTS SOLD SEPARATELY