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beatr911 · 05-24-2011, 10:20 AM

redyaris is right that going over 60 is just just too much for the 200. My 200 is happiest at just about 60 with taller gearing. For reference, my Yamaha 200 clone gearing change was from 15/46 to 15/40. My average is about 79 mpg now, consisting of 10 miles of 40-45mph and 20 miles of 60mph on the daily commute.

The DR200 has great potential. Taller gearing will help but only so much. If you can, install a O2 sensor and jet correctly. I adjusted the needle (1/4 to 1/2 throttle) lean and am still dialing in the main (1/2 to WOT) to a target of about 13.5 to 14 or so. For WOT on the freeway 14.7 (stoich) is too lean and can lead to excessive heat and engine damage.

The rest is aerodynamics, slower is better.

05-24-2011, 10:20 AM	#9 (permalink)
beatr911 Master EcoModder Join Date: Feb 2008 Location: West Coast, USA Posts: 516 B2300 - '96 Mazda B2300 SE Focus - '05 Ford Focus ST The red car - '00 Honda Insight Thanks: 6 Thanked 77 Times in 56 Posts	redyaris is right that going over 60 is just just too much for the 200. My 200 is happiest at just about 60 with taller gearing. For reference, my Yamaha 200 clone gearing change was from 15/46 to 15/40. My average is about 79 mpg now, consisting of 10 miles of 40-45mph and 20 miles of 60mph on the daily commute. The DR200 has great potential. Taller gearing will help but only so much. If you can, install a O2 sensor and jet correctly. I adjusted the needle (1/4 to 1/2 throttle) lean and am still dialing in the main (1/2 to WOT) to a target of about 13.5 to 14 or so. For WOT on the freeway 14.7 (stoich) is too lean and can lead to excessive heat and engine damage. The rest is aerodynamics, slower is better. __________________ Good design is simple. Getting there isn't.