KRi1iKaL

Check these pictures out. To me it looks like my cylinder is only partially honed? My piston feels solid to the crank. I'm thinking I get it honed, measured, new rings, and see where I'm at. Can I reuse my gaskets? Can I drill gaskets to increase coolant flow where it was blocked?

Check these pictures out. To me it looks like my cylinder is only partially honed? My piston feels solid to the crank. I'm thinking I get it honed, measured, new rings, and see where I'm at. Can I reuse my gaskets? Can I drill gaskets to increase coolant flow?

This is my first time doing anything engine related and my only source of knowledge has been these forums. It is very possible I did not break it in right. I didn't do much other than ride it without letting it idle while throttling the rpms and then letting it cool down while off. Changed oil and then rode it normally. Valve seals were said to be changed and valves lapped. I took my exhaust valve out and there was nothing obvious. Maybe I should test with gas and air? Wrist pin is new I believe but I'm hesitant to take my piston off. I did feel like my engine was getting hotter than normal but it's the middle of summer and no warning light and fan kicked on religiously. It is snorkeled with radiator relocated which my ! didn't realize that was a red flag it got sunk. The guy I bought it from used water in coolant which caused alot of oxidation. After rebuild only coolant was used. All hoses had coolant when disconnected. The guy that fixed it is a good guy and does a good job and the fourwheeler Is a complete piece of crap. I think he's aggravated I took it apart instead of bringing back to him. I will post more pics when I'm home from work around 6:30.

Thanks for the response man. Bottom end was completely split open and cleaned out with new rod, one way bearing, timing chain, and clutches. I consider the guy that rebuilt it to be trustworthy and he sent me pictures. He mentioned having the topend bored by a local machinist but I'm not sure where he got the cylinder from. I will check wrist pin when I get home but everything to my knowledge should be new and looks different from when I pulled the topend off the first time it smoked. Just strange that it ran so well for 2 months and then started to continously smoke. I've got 1700 dollars in it on top of the 3200 I paid so I want to be sure I get it right. The only thing I can think is possibly my valve guide is bad if it isn't the piston rings.

I have a Honda 420 that I bought used and within 30 minutes of having it home, the engine was leaking oil. I had the whole engine rebuilt bottom and top end. It ran good for 2 months but started to smoke like crazy at start up and as it ran. I pulled the top end off to take a look. Nothing stands clearly out to me but my only knowledge is from the forums. One thing I noticed is that the bottom rings snd oil rings are significantly smaller than the top two ring on the piston. Is this normal? Also, let me know what you think of how much the gasket restricts coolant flow. Would love any inputs. Thanks guys,