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Any help appreciated…. I have a 2015 Massimo Gunner 250s that I had to do the top end on. I can’t find a correct video or manual that matches the timing marks this one has for the chain and cam gear. Does anyone have the correct marks to line up???

Our Gunner 250 stopped charging the battery, just wondering if anyone ahs had this problem before I dig in to it?

I am working on a ride for a friend of mine, it is a Gunner 250. Machine was parked last year because it wouldn't idle right. It would idle way up then back down to almost stalling so they parked it. His kid now wants to ride it again so we've gotten it out. First thing we did was drain old gas and re-fill. Changed filter and spark plug. It will start right up but immediately dies. Checked for fuel pressure it and it is good. You can spray starting fluid in fuel injection and it will do the same thing. Fires right up then dies. Anyone have a clue what this could be? I appreciate any help I can get! Thanks