Need some help with a Wiseco top end.

3 replies to this topic
  • dunecj2a

Posted November 14, 2005 - 09:55 AM


I'm gonna put a new Wiseco piston this week in my 450. I was lookin at today and noticed all the different rings. What order do those rings go in. This is my first 4stroke top end I have done. Man there are alot more rings :applause: What ever happened to 2 rings only :ride:

Do I have to punch the cylinder to Deglaze it like my smokers.

  • Pincushion

Posted November 14, 2005 - 11:51 AM


It should've came with instructions on how the rings go. I believe it went as follows with the piston on the bench and the middle intake indention at 12 o'clock:
-Top end ring between 10 and 11 o'clock
-second ring between 4 and 5 o'clock (exact opposite from top end ring)
-oil ring gap goes in the same place as the top end ring (between 10 & 11 o'clock). Make sure the ends do not overlap each other, they must butt up end-to-end. Next insert the upper oil ring and put the gap betwen 6 and 7 o'clock. Finally insert the lower oil ring (making an oil ring sandwich) and the gap goes in the same spot as the 2nd ring (between 4 & 5 o'clock).

its much easier to see on paper. Make a diagram if necessary so you can see it.

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  • dunecj2a

Posted November 14, 2005 - 01:29 PM


Thanx Pin, Will my OEM look the same? Will it have those different rings that the wiseco has?

How about punchin the cylinder?......thanx :applause:

  • Pincushion

Posted November 14, 2005 - 01:50 PM


OEM rings are the same also. here's a PDF to the manual, look around section 4-44 for piston/ring info

Read the replies to this thread about honing the cylider
http://www.thumperta...ght=cross hatch

If you bore it then you've got to have the nikasil reapplied, which is no small feat. But if its good shape then just do what Grayracer says.

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