Basic 4 Stroke Tuning Tips
Product Description
TUNING TIPS-4 STROKE -
Cam Timing: Cam timing must be properly set before engine can be jetted/tuned. Improper cam timing will cause poor engine performance and in some case internal engine damage.
- Ignition Timing: On engines that allow for ignition timing adjustment, the timing must be set to the correct mark. Too much Advance will cause the engine to overheat and have trouble revving to full potential. Too much Retard will cause engine to be down on power, and generally run weak.
- Intake Leak: An air leak on the intake side of a 4-stroke engine will cause the engine to run lean. Intake leaks make tuning a 4 stroke very difficult. Unless the leak is very large and easy to locate and correct, tuning can be quite troublesome because a small leak will give very inconsistent feedback to the tuner. Common causes of intake leaks can be; loose carburetor, loose inlet manifold, worn damaged or missing sealing o-ring at inlet manifold or carburetor, pin hole or crack in inlet manifold, etc.
- Exhaust Leak; An exhaust leak especially at the header connection can cause tuning difficulties and engine damage in extreme cases. In most cases exhaust leaks will cause inconsistent tuning feedback and unexplained popping during deceleration. Before beginning to tune your engine check your complete exhaust system thoroughly for any sign of an exhaust leak. Common causes of exhaust leaks can be; loose exhaust nuts/bolts, missing or damaged exhaust gasket, broken or stripped exhaust studs, improper fit at couplers, etc.
- Valve Clearance: Valves must be adjusted to their proper setting. Excessively tight or loose valves will affect engine performance.
- Cam Chain: Cam chain must be kept in adjustment at all times. A loose cam chain allows cam timing to be altered, effecting engine performance.
Cam Timing: Cam timing must be properly set before engine can be jetted/tuned. Improper cam timing will cause poor engine performance and in some case internal engine damage.
- Ignition Timing: On engines that allow for ignition timing adjustment, the timing must be set to the correct mark. Too much Advance will cause the engine to overheat and have trouble revving to full potential. Too much Retard will cause engine to be down on power, and generally run weak.
- Intake Leak: An air leak on the intake side of a 4-stroke engine will cause the engine to run lean. Intake leaks make tuning a 4 stroke very difficult. Unless the leak is very large and easy to locate and correct, tuning can be quite troublesome because a small leak will give very inconsistent feedback to the tuner. Common causes of intake leaks can be; loose carburetor, loose inlet manifold, worn damaged or missing sealing o-ring at inlet manifold or carburetor, pin hole or crack in inlet manifold, etc.
- Exhaust Leak; An exhaust leak especially at the header connection can cause tuning difficulties and engine damage in extreme cases. In most cases exhaust leaks will cause inconsistent tuning feedback and unexplained popping during deceleration. Before beginning to tune your engine check your complete exhaust system thoroughly for any sign of an exhaust leak. Common causes of exhaust leaks can be; loose exhaust nuts/bolts, missing or damaged exhaust gasket, broken or stripped exhaust studs, improper fit at couplers, etc.
- Valve Clearance: Valves must be adjusted to their proper setting. Excessively tight or loose valves will affect engine performance.
- Cam Chain: Cam chain must be kept in adjustment at all times. A loose cam chain allows cam timing to be altered, effecting engine performance.
PROFESSIONAL INSTALLATION IS RECOMENDED FOR ALL ITEMS - OVERSIZED ITEMS EXEMPT FROM FREE FREIGHT
