Join Date: Aug 2011
Location: southern Arizona, USA
Thanked 408 Times in 317 Posts
My NX 250 (water-cooled, carburated, DOHC single) provided good fuel mileage and adequate acceleration when run at 1/2 to 5/8ths red-line rpms. That bike was redlined and 8K so I typically rode it at 4000 to 4500 rpm in the speed range that you have discussed.
For top speed I ran it right up to 8K in 5th before shifting into 6th gear. The bike topped out at 90 mph, but it took a long while to get there. If I could not pass using 5th gear, I did not attempt passing.
John: '09CRF230L (Li'l Red Piglet), '89NX250 (sold)
Propelled by Penguin Power
Nekkid motorcycles feel faster
1st bike: a gently used 1958 Matchless 250 thumper