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Posted

Hello, new to Quad crazy. I'd like to say thank you for having me. I bought a 02 honda trx 400 ex for $200 with 4 extra very nice ITP rims and tires for the dunes and 2 stock rims with drag rear paddles. didn't run. got it running. They owner before me said it has a big bore kit in it. Does that mean it's been bored .040? or could it be any sizes bore kit? And if it is .040 over. is it a 440? I've seen a 416 a 426 on the forum. so I'm not really sure of the size difference between stock engines and bored engine when there bored out. I'm at this point right now. bought a rebuild kit for the carb. On theses engines what would cause the engine to knock? A buddy sold me the quad and it was his sons so he didn't know what was wrong with it. just that it didn't run. I'm hoping to get a little help from the forum. how would u go about trying to figure out what is wrong. Would the bored out kit cause the motor to knock. It smokes kinda white sh blue smoke. I was also told the the connecting rod is pressed to the crank. if this is true can the connecting rod be removed from the crank to replace just the connecting rod or do I have to replace both? i'd like to rebuild just the top end. I'm a small guy only weighing 125lbs don't really need a bunch more HP. But what ever HP parts are in it. I'm going to try and replace them with the same. what rebuild kits would u use?Never rebuilt one before this will be my first. There seems to be a whole bunch of racing upgrades on this quad. The axles are even longer for better handling. Thanks everyone I'm new to all this. Thanks for reading all my questions!!!I want to ride real bad. Cant weight!!! Thanks again for having me and all your help!!! Thanks Brad

Posted

Could be a con rod bearing knock. Piston slap or maybe valves White blue smoke is burning oil. Rings or valve seals... Maybe a cracked head. This motor def needs to be taken apart an evaluated

Sent from my SGH-T989 using Xparent BlueTapatalk 2

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