Motori Minarelli’s Yamaha YZ300 single-cylinder, 300cc two-stroke with electronic injection and electric start, specifically designed to enduro racing. The Dellorto throttle body might look familiar to any KTM TPI owner but the angle at which it sits and enters the cylinder head is not same. This is the angle where they think it should be for optimum performance. This yz300 engine is quite interesting and has fuel injection, which means that the engine will be more aggressive but also easier to manage in hard enduro. This is finally a serious competition for KTM, Husqvarna, GasGas, Beta and Sherco in hard enduro world. Also a big advantage of this motorcycle is the electric starter which is very much needed in enduro riding.
Motori Minarelli’s press release from the EICMA show explains the engine is “a single-cylinder, 300cc two-stroke with electronic injection and electric start, specifically designed to equip enduro racing bikes.”
Encouragingly they say the project objectives of the new 300cc, 2T FI are “explosiveness and great acceleration, ensuring absolute performance off-road.” They talk about a mechanical decompression system “for reduction at the moment of start-up” to ensure consistency in restarting, plus “an innovative exhaust valve will optimize performance at low-medium RPM.”
The Dellorto throttle body might look familiar to any KTM TPI owner but the angle at which it sits and enters the cylinder head is not and this is apparently not just a mock-up in that regard. “This is the angle where we think it should be for optimum performance”, a spokesperson for Minarelli