Follow this guide in a 20 minute session.

First 10 minutes:

Set the carburettor on race settings:         Low Jet 1 and 1/3 approx.

                                                                             High Jet 1/3  approx.

Using full throttle, rev the engine 3000rpm to 10000rpm.  Then brake to slow down to 3000rpm.

Second 10 minutes:

Set the carburettor on rich settings:          Low Jet 1 and 1/3 approx.

                                                                             High Jet   2/3  approx.

4 stroke the engine to approximately 13000rpm.  Then every lap after that reduce the 4 stroke over the 10 minute session.  Reduce the 4 stroke by using the high jet.

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