ANY BODY KNOW IF THE DISI TIMING NEEDS RETARDING IF YOU FIT AN RC40 OR SIMILAR EXHAUST---CHEERS
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Timing should be the same. But the fuel mixture may need adjusting. If you've fitted a better exhaust manifold and a higher flowing air filter then you'll need a new needle for the carb.
You really need to get it set up on a rolling road so they can optimise the tuning throughout the rev range and select the ideal carb needle.
Taffy
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