How to get piston back into cylinder?

[dancycle]

yeah, I figured out that the piston has the little pins a bit too late. I was trying so hard to compress the top ring that it snapped on the pin. So now I have to get another set, but at least I know how to do it now. Again, my impatience biting me

 

[kenspice]

Definitely get a new set of rings! Installing one ring is asking for future trouble and expense. You should be able to install them with your fingers. If not, a hose clamp and a drop of oil as suggested will do the trick. Putting one ring on your piston is kind of like putting a small wheel on the front of your bike so you will always be going down hill.....

 

[Egor]

Just for a giggle give it a try. Move the ring to the top slot put it together and try it out, like I said I have one that way for over a year. The small pin is gone for that ring land so the ring would just move over and get in the port. So this is the fix for now, I have a new barrel and piston to replace it but why, it runs good, I leave it alone. You could do this till the new one arrives. Let us know how it runs. 45 years as a motorcycle mechanic you learn tricks. Have fun Dave

yeah, I figured out that the piston has the little pins a bit too late. I was trying so hard to compress the top ring that it snapped on the pin. So now I have to get another set, but at least I know how to do it now. Again, my impatience biting me

 

[kenspice]

Could be an expensive giggle. Unless its an emergency, try to put your engine back together with all its parts. ABeagle summed up the reasons why. 51 years as a mechanic and still find it best follow the book.

 

[locoWelder]

No!

 

[dancycle]

So I take it that there are different opinions on the subject. I'm not sure what to do though. Like I said, one ring is still intact, but the other broke in one spot. I'm just not sure I can find another ring to fit my piston. Is it possible to use somekind of "steel-bonding" product to mend the broken ring, or is that just asking for trouble?

 

[azbill]

who did you buy your kit from?
they may sell rings
or, somebody here might be able to tell you where else to get them

 

[dancycle]

I bought my kit from a guy on ebay. I emailed him asking if I could buy the parts, but haven't gotten a reply yet. The ones I saw on bcmoped.com looked like they might work. It is called "Precision High performance Piston Ring Set 70/80cc." The fact that it says 70/80cc makes me think they are a generic/standard size, and my engine appears to be the standard chinese engine.

 

[Alaskavan]

I would get a diameter for the piston and question possible vendors about whether their rings will fit a piston of that specific size.

For anyone in the future, before you try to put your jug back together, perhaps you should read: http://www.motoredbikes.com/showthread.php?t=4860&highlight=rings

 

[Egor]

Kings and Dax have rings. Kings has a barrel kit, with a piston fitted.