replacing rings and measuring ring end gap

[4stroker]

can i use wiseco rings on oem pistons

 

and how do i measure ring end gap, and what are the tolerances

 

thanks, mark

[2strokespirit]

can i use wiseco rings on oem pistons

 

and how do i measure ring end gap, and what are the tolerances

 

thanks, mark

 

I would not recommend it, stay with the yamaha rings on the yamaha pistons. You put the ring in the cylinder and measure the end gap with a fueler gauge. Both rings standard limit is 0.3 - 0.45mm and the limit is 0.7mm, I just checked the manual.

[chevy7398]

if i remember correctly this has been brought up before and the weiscos are thicker than the stockers

[4stroker]

can you buy special feeler guages or something?

 

the fingers on my feeler guages are like half an inch wide, cant see how you would measure the gap with them?

[dajogejr]

??

Put the ring in the cylinder, square it up by using the crown of the piston to push it an inch or so down, then use the feeler gauge to check the gap. As long as your feeler gauge isn't 3 to 4 inches wide, it will work. This is how everybody I've ever seen do it checks ring end gap...

Remember, you're checking the gap of the actual ring, so the feeler has to go past the ring locator lands and in between the ring gap flush against the cylinder wall....

[Bansh-eman]

Dave, i think he was trying to check it with the ring on the piston and thats why he couldnt do it...

 

 

 

4stroker, you need to put the ring in the cylinder and use your piston to make sure its nice and even. then put your feeler gague down in there and messure the gap, the ring does not need to be on the piston when your checking it.

[jbooker82]

You should consider puting in some prolites while your there.

[4stroker]

lol riiiiiight, i had never even thought of not doing it on the piston!

 

thanks guys

[ClimbAnyHill]

Lower stock ring is thicker than the top one.

Both Wiseco rings are the same size.