Hi there... I really need your help guys.. I bought piston ring sit  for my Yamaha DT175.. The other ring has an " N " mark in it.. So where would I put this Top or Bottom groove of the piston? 

Not sure about the N mark but usually the bottom groove is parallel and the top one is a keystone section so look at your piston rings and fit them appropriately

What make of rings ,?     

Si airhead... what do you mean when u say "keystone" ??

Si airhead... what do you mean when u say "keystone" ??

the keystone ring will be thinner at the inside diameter and thicker at the outside diameter and so the top ring groove will taper to accommodate that

 

If you put the bottom ring in the top groove it will not seat fully, it will stick out a little from the side of the piston

 

see here, and note from the link that 'N' faces up when fitted

http://www.golfcarnews.com/technically-speaking-mayjune-2008/

Edited November 21, 20159 yr by Airhead

Thanks alot sir airhead, a big help for.me...btw airhead.. is 34mm flat slide carb is good for my DT175??

Thanks alot sir airhead, a big help for.me...btw airhead.. is 34mm flat slide carb is good for my DT175??

I would stick with the standard one, they aren't the most modern of engines so a big fancy carb would be wasted on them I would think

Thans alot again sir... a big help for a noob like.me... cheers