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50/1
NGK Spark Plug BR8ECM
09 250sx has 47 hp
No.
40:1 is a good mixture.
The 250sx has about 47 hp and does 71 mph (stock).
2009 KTM 250SX retail price $6598
My manuel recommends 40 to 1on my 2001 ktm sx I've never had any problems with it..
32:1 is a great gas to oil ratio for any two stroke motocross bike. Also, a Ratio Rite is recommended for accuracy and simplicity.
32:1 ratio
13 ounces
Stock gearing 70 mph