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For air-cooled models, adding an external oil cooler is the single best way to ensure your oil doesn't break down under high-stress "hot" conditions. 3. Tuning for Speed: The Electronic Edge

Adjusting the air-to-fuel ratio to ensure the engine isn't running "lean" (which causes overheating). www xxx 250 hot

Advancing the spark to happen at the exact millisecond required for maximum torque. 4. The Importance of Maintenance For air-cooled models, adding an external oil cooler

"Hot" setups use expansion chambers or high-flow headers to scavenge exhaust gases out of the cylinder as fast as possible. 2. Managing the Heat: The "250 Hot" Challenge For air-cooled models

A standard 250cc engine is built for reliability and fuel economy. A "hot" version, however, usually features several key modifications: