Heres the deal, The engine on my KQ is knocking for the THIRD time! I have had it completely rebuilt by 2 different dealerships and it is doing it again. So im to the point where I dont want to rebuild it and take my chances. I want to put a completely new engine in it. Problem is I am having a hard time finding one. I dont want rebuilt or re manufactured or anything like that. Just looking to find a crated engine for a 2007 King Quad 450.
I guess it would help if you described the KQ a little more. What manufacture, who makes the engine.
It also seems that the dealership should be able to give you a price on a brand new engine. It sounds like it is possible that they throw a rod every once in a while. Just wondering why yours knocks so much? A anti-knock sensor not working? Or bad timing on the ignition causing the piston slap? Or piston slap caused by a slighgtly out of spec rod? or worn piston rings? or worn cylinder walls.
If it is only a matter of retarding the timing by a couple of degrees, that is a simple fix, no need to rebuild the engine at all! Or it might be running to lean, and the piston is pinging.
Modern cars have a ping sensor, and it will cause the engine energy management system to either enrich the fuel to the engine, or retard the timing, to prevent ping that you can not hear, such as when climbing a hill. IT can also cause a downshift, to bring up the RPM's so pinging goes away. This is why running a higher octane gas will improve the miles per gallon of most modern fuel injected cars and trucks. Sure the gas costs $0.20 more per gallon, but if you are going 10% farther, is a 5% price increase worth it or not?
Honestly, I would not have a motor rebuilt at a dealer. They are the maintenance experts, but major overhauls should be left to people who do that specifically for a living. For example, I trusted my race bike to CT Racing in California (when I lived there). They build bullet-proof motors all day long, and their teams win or place in the baja(s) pretty much every time. Maybe you have a motor shop somewhere near you(?). I bet there is a shop somewhere that specializes in 4x4 motors, and if not close, you could ship it to them. If they are knowledgable enough, they would know why that motor does that and be able to describe how to make it more durable. You could ask around in some of the 4x4 atv forums for reputable motor builders. Hope this helps
I'm with Shawn. Have a reputable performance shop do the rebuild. We just had CT do some work for us. They've been around forever.
Four Stroke Tech is also a reputable builder of engines. I think he's still in Pa.
Go to quadzone.com and register in the forums. Ask around and I'll bet someone can tell you some good places. I'd highly prefer this over a new motor. If you want, they'll even hod rod that motor up some. And they'll do it to make it still extremely reliable.
I'm not aware of any manufacturer that sells crate motors. Service Honda gets CR500 motors and KX500 motors somehow for their specialty bikes.
I'm with the last two though, there's no reason a reputable engine builder can't do it right. Actually a correctly rebuilt "seasoned" motor is better than a virgin one as its already expanded/contracted through heat cycles where as a new motor needs to "take a set" from cycling.
I'm not a quad guy and in CA so can't help you with where to take it.
Have you checked eBay? I know that there are Polaris Rzr crate engines available there for $1900, so you may be able to find one for the Suzy. I agree with the others tho about finding an engine builder and going with what you have. That is what I would do.
Bob & Betsy(FishNFanatic) - USN Aviation Ret'd '78 & LEO Ret'd '03 & "Oath Keeper Forever" '05 HR Endeavor 40PRQ, 400 Cummins-Pulling our '11 Silverado LT, Ex Cab 6.2L NHT 4x4, w/2010 Rzr or 01 V Star in back. Where the wheels are stopped today