Hi guys, I will start by saying I'm not looking to bash, but need some educated input from the members please. 09 Xtz 1000, 4 seat cage, 26 inch bajacrosses on 14 in. wheels, Ron Woods exhaust/intake, and power commander. I am second owner, bought it with 50 miles, currently have 381 on odometer. Went to Dumont for Halloween, noticed only pulling 5k on dash readout set to rpm mode. Was seriously thinking call Airdam for some upgrades, and bragging to fellas with me about unlocked potential, especially 2 guys looking to upgrade from rhinos in my group. Attempted to pull comp hill again for some braggin rights around campfire against rhino/teryx owners, and big backfire before coasting to bottom to be towed back by rhino
. Checked it next morning and still won't start, so pulled plugs and found rear plug had no gap, aluminum appearing splatter, and no apparent compression in cylinder.
Fast forward to droping off at dealership, no extended warranty but hoping perhaps they could work some magic with rep as I am aware of other problems from following this forum. Engine dis-assembled to find piston failure on rear cylinder, from top ring land to piston dome, approx 2"'s of piston gone on either intake or exhaust side, but not entire circumference. As my luck would have it, piston material wiped out that head, and appears material went thru intake track and peppered other head/valves, but dealer says re-cut valve seats will suffice.
So.....I'm looking at new cylinder/head for rear, rework front head, gaskets and of course labor. Service tech says he is in contact with AC rep who requested pictures of parts. I'm no engine builder/guru, but appears piston just failed, tech says possible detonation. My question is.....why only 1 cylinder if that's the case( I realize rear could get hotter on v-twin), I feel rig was assembled with reputable add-ons. More importantly....don't want to have a repeat engine failure. Again, my intent is not to bitch, just looking for some educated input so I can get back to enjoying machine, and spend funds on going faster....not potential 3k repair build. What say the experts