i have an lt230s that smoked alittle when i bought it about 3 years ago. since i have put 20-30 hours on the engine. i have removed the head and the piston, the rings seem to fit tight and there is no scoreing or warpage of the head. where do i go from here? Also the piston is clean without any carbon build up. the only carbon build up is at the very top of the head where the piston does not reach.
thanks in advance
john

 

i used to have 2 230 quadrunners and checked them like you did, i put in a new rebuild kit with new piston and rings and it still smoked, i then took the head off of them checked them out and they looked fine to me, but i took them in to get checked out and they said the vavles were bad so i had them replaced and put it back together and ran great with no smoke, so you might have your valves checked out good luck

 

thank you, that is what i suspected, but i wanted another opinion. i will take it to the motorcycle/quad repair shop down the street to have it checked out tommrow.

 

i heard the valve seats are prone to going out on those...shouldnt need new valves unless they are bent/damaged.

 

you need new valves because they wear where the seals ride. the seats are for compresion not to keep oil out.

if you put new valves and seals in that should fix the problem. also have the new valves seated so you will have good compresion.

 

There are only 2 ways your engine can burn oil, bad rings or bad valve seals. If your rings/piston look good, it's gotta be the valve seals.

 

just an up date-- place down the street is more interested in selling me a new quad, than helping me fix my old one, so it looks like i will have to get a seat lapping tool and a valve spring compressor to do the work my self. It just makes me mad that they want to sell me a new quad, when i will be perfectly happy with the one i have when it no longer smokes. any tricks or warnings before i start? oh, btw, i am getting a valve kit from www.vincescycle.com

 

When does it smoke? Does it smoke at first and then stop smoking after it warms up? Does it smoke more as it warms up? Or is there any dif. warm to cold?

 

You don't necessarily need a valve lapping tool and all that. I've heard of people just putting grinding polish on the valves, sliding them into the seat and just rotating the valve back and forth. It's supposed to make a perfect mate between the seat and the valve. The compound is like 5 bucks so it'd be worth a try even if it doesn't work.

 

bigmc, it smokes all the time, no matter how hot or cold.
i will see if i can find that grinding polish, what types of stores carry it?
thanx, john8n