2009 Polaris Sportsman XP 550 EFI 4x4 - $2650
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By Tejun
Has anyone found a good source to purchase quality injectors for the Coleman Outfitter 550 ? I've used Motorcycle Doctor on eBay in the past but havent had to purchase one in almost 2 yrs now. Mine was running a bit rough at idle and dying sometimes so I had two that I had cleaned and tested at an injector shop. Put one in that had the best performance curve and it ran worse. Pulled it and installed the other one and couldn't even get the engine to start so I put the old one back in. Its running ok now, just want to get a new one to install
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By Copperline
I have a Coleman 550 (hisun). Wouldnt start and was sucking instead of blowing through the spark plug hole. Got to the timing chain and it was very loose and for sure the timing was way off. Got the tensioner off and set it to TDC and got the cam gear back aligned. Put the chain back on and set the tensioner as instructed and the chain is still very loose. I extended the tensioner as far as it would go to test and the chain is still loose.
Any ideas what could be broken or wrong? Why would the chain be so loose?
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By y2kbmet
I'M STILL GETTING BACKFIRE UPON DECELERATION: 2 days ago, Strike was very sluggish, wouldn't make it up a hill. It is EFI with under 200 hrs. Yesterday, I replaced the plug with same exact I took out (NGK-R DR8EA), as it was covered in black soot. I cleaned the MAF with MAF Sensor Cleaner - not sure if I ripped one of the 2 o'rings pullling it out of it it was like that but either way, when I put it back in, it was seriously tight so I don't think that's affecting anything. I cleaned some of the throttle body (without removing it and without touching the flap), with Throttle Body Cleaner - it was kind of dusty. I cleaned the air filter which I replaced just 3 months ago when I did the oil change. All connections seem to be good. I could not find any exhaust leak anywhere. It got dark on me but I took it for a spin last night after putting it all back together and it seems to have it's power back but it's still backfiring when I decelerate quickly. Anybody have a clue what's next or had this issue before? TIA.
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