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Dyno Charts
The following links will take you to the dyno testing results. I had 4 versions of the FCR-MX ready for testing and 3 different pipes; stock, FMF-Q2 and the GSXR. I'm only posting the carb results here running the GSXR system.
39mm with the straight adapter
39mm with velocity improver
39mm with velocity improver and Power Now
42mm with velocity improver
Bigger is better?
No! The DR650 is a low tech torque engine. It will never spin up like a DRZ400 engine nor is it designed to do so. Take advantage of its strong point.... torque. Don't over carburate!
39mm vs 42mm comparison