Compressing piston ring
Posted September 09, 2005 - 05:12 PM
I'm doing this all by hand like the Yamaha factory manual suggests (it's a wr400 btw).
Posted September 09, 2005 - 09:38 PM
Did you hone (i think i spelled that right) out the cylinder walls first?
Posted September 10, 2005 - 12:44 AM
Posted September 10, 2005 - 10:15 AM
Posted September 10, 2005 - 01:14 PM
Posted September 11, 2005 - 06:25 PM
Posted September 11, 2005 - 06:29 PM
I wouldn't mind cutting it with a pair of dykes!
where you can cut it with a pair of dykes.
Posted September 11, 2005 - 08:48 PM
It seems the oiler rings are not able to compress completely. It compresses completely about 90% around the piston, but the other 10% does not want to go in at all. Does this mean I have to file down the 3 oiler rings? Or is it that I just don't have the rings installed correctly? What order do you put them in? I have to put the center oil extender ring in and then the 2 oil rails, is this correct?
If you have your manual handy it helps.
The ring order from top to bottom:
1st) The top ring is bright (shiny) and should have a "T" next to the opening of the ring, make sure the "T" is facing up.
2nd) The second ring is sometimes darker than the top ring, looks more like a brass color, if this one has a mark on the opened end of the ring make sure it is also facing up.
3rd) The third one is the oil ring.
Make sure that all rings are fully seated in their grooves and should easily move around on the piston. Also place the openings in 3 different locations on the piston Example: 1st at 2:00 0'clock
2nd at 6:00 0'clock
3rd at 10:00 0'clock
This helps in compression and in the breaking-in of the piston and rings evenly.
Posted September 11, 2005 - 08:54 PM
Posted September 12, 2005 - 09:12 AM