How does one measure it?
Any tricks for getting the rings off the pistons without scratching the piston crown or skirt?
Thanks
Ring end Gap
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Ring end Gap
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
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- 100+ Posts
- Posts: 134
- Joined: Tue May 13, 2008 11:10 pm
- Location: siloam springs, AR
Re: Ring end Gap
use ring expanding pliers to get them off without scratching the pistons , to measure ring end gap you will need to insert the ring down in the cylinder by itself, shove it down about 1 " deep in the cylinder and make sure it is square with the cylinder walls " same distance down all the way around the ring" then use feeler guages and measure the ring end gap ( the gap between the two ends of the ring) i'm sure you already knew the last part.


Re: Ring end Gap
Thanks! Everyone says, oh yea, measure the ring end gap to see if they are below spec... but nobody knows the correct procedure to actually measure the ring end gap.
I need new friends.
It is pretty much a given that I will need new rings, do you happen to know anywhere to get them at under $90/piston?
I need new friends.
It is pretty much a given that I will need new rings, do you happen to know anywhere to get them at under $90/piston?
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
-
- 100+ Posts
- Posts: 134
- Joined: Tue May 13, 2008 11:10 pm
- Location: siloam springs, AR
Re: Ring end Gap
I have been seeing quite a few brand new sets on ebay lately for pocket change, i would look there first.


Re: Ring end Gap
I got one set for $20. Saved me $70! Only took four years to find one, so in another 12 I should have enough for the rebuild!
Should I be looking anywhere other than ebay?
Should I be looking anywhere other than ebay?
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
-
- 100+ Posts
- Posts: 134
- Joined: Tue May 13, 2008 11:10 pm
- Location: siloam springs, AR
Re: Ring end Gap
well, if you can't find new ones on ebay ....... take a jar of vaseline and your wallet and go to the dealer.


Re: Ring end Gap
Unfortunatly, that might be the only option.
I never could understand why Yamaha rings and pistons are so expensive. I don't think I paid $90 for both sets of ducati rings.
I never could understand why Yamaha rings and pistons are so expensive. I don't think I paid $90 for both sets of ducati rings.
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)