84 200m, new rings, smokes badly

[barnett468]

My pistons still good.

You can only determine if piston is good if you measure it or put a new one in yourself recently. Looking good means nothing.

[my1423]

Probably rings, but another thing to check.
Still means taking it apart.
Did you put in a new head gasket and orings?
There is a rubbery oring that goes around one stud. It is thick and goes around a dowel.
It is the oil galley that feeds the head.
Do not know how many I have seen that people left it out and missing the dowel and ran puking oil all over.
Most outside but a few right into the chamber.
Also people who do not fully clean that area by leaving the dowel in place and not cleaning around it can get the leak as well.

[CodyRosa]

yup brand new gaskets on top ends, new o rings, new o ring on the dowel.. but an update on the smoking... I let it idle for 10-15min and NO SMOKE.. NONE .. NONE WHAT SO EVER. So I'm wondering if it has to do with moisture in the air from the rain before. I decided to ride the thing on the worst possible day after switching in new rings lol. My machine ALWAYS smoked badly from the moisture. I smelt the exhaust and it smells like normal exhaust, no oil burning. I checked plug, not sure if it should look different from the oil but it was normal looking, brown.

[CodyRosa]

So It does NOT smoke on idle, very very very faint, it smells like exhaust not oil to. I put it into 1st gear and drove up and down my driveway and it smoked, I could smell it to. Then I put into neutral and it'll stop smoking... =/

[kb0nly]

Smoking under load but not at idle is still rings/bore issues. I highly doubt you can get by with a hone and new rings on a 29 year old motor. Lets face it they last but not forever. Your best bet is to get this saga over and have it bored and honed and get an oversize piston and ring set. The Shindy brand is what i have in mine and a few others, good price and reliable, made in Japan not China.

No amount of honing and new rings will fix it with a egg shaped bore, which i bet yours is out of spec by now.

[yaegerb]

I guess I missed the part where you stated you only honed it. Well, that's a problem. Like KB said, your cylinder is out of round or more like an egg shape than a circle. I ALWAYS bore my cylinders, unless I know that it hasn't been over a couple years since my last ring change.

[CodyRosa]

yea i told my dad how you said i should bore.. and he just suggested getting it bored then high comp piston. Roughly how much is a bore?

[yaegerb]

at my local shop its 50 bucks. The easiest method to do this is to buy your piston and rings and take those in with you and have the shop bore the cylinder to the new piston and ring setup. That way you know the cylinder/piston/rings all match.

by the way, if you go 12:1 high compression piston you will be married to race gas. I wouldn't go any higher than 10.25:1

Here is one: http://www.ebay.com/itm/Wiseco-Pisto...ht_1697wt_1006

[CodyRosa]

haha yup i thought about 12:1 until i saw it was for racing and heard you needed race gas. Thanks for that link! Now i have to try and sell my piston and rings on ebay lol .. wasted 45 bucks to find out it needs to be bored. At least now I know, im alway boring haha

[barnett468]

i have to try and sell my piston and rings on ebay lol.

You said your piston was not new and now your rings are used so I wouldn't expect more than $10.00 or so for them if that but who knows. Some people will buy anything. I wouldn't tell anyone the piston is good unless you measure it to determine if it is or not.




. wasted 45 bucks to find out it needs to be bored. At least now I know, im alway boring haha[/QUOTE]

[ebaccm26]

At least now I know, im alway boring haha

You don't seem that boring

Make sure you get it done sooner rather than later, you don't want to be risking further damage if your bore is that out of whack.

[barnett468]

Roughly how much is a bore?

Don't forget the cost of a good us made piston and ring set if you don't want to take chances of it smoking again. Maybe $125.00?

[CodyRosa]

Yup i'll be going with Wiseco or KB said Shindy. EBA haha wow i didn't even notice that's how i wrote that. I know i'll always be boring my cylinders =D

[kb0nly]

Watch out or one of the mods will change you from Just Too Addicted and make it Just Needs Boring... LOL

[joefixit0]

I'm assuming your oil ring is the 3 piece style, make sure that the expander ends are NOT overlapping, if this happens and you install them like this, the oil ring will never seal.