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Have a question for you guys. I bought a new 09 Nytro in September. After I got it home I started it twice to move it off the trailer into the garage, and about month later I started it to move it again. It started right up right both times. Two days ago I tried starting it to go for a ride. It turned over but never fired. The battery started running low, so I then jumped it. It turned over for awhile longer and back fired hard and then started. I let it run for awhile and rode about 10 miles. Today it had to turn over for quite awhile, I stopped cranking. I tried again for about 10 seconds, and it back fired again and started. I ride about another 5 miles, but seemed to lack a little power. My question is, Is this normal? Im new to the whole four stroke engine.