Ring end Gap

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fink
Site Newbie
Posts: 7
Joined: Sun Jan 04, 2009 1:40 am

Ring end Gap

Post by fink »

How does one measure it?

Any tricks for getting the rings off the pistons without scratching the piston crown or skirt?

Thanks
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
modkingfzr600
100+ Posts
100+ Posts
Posts: 134
Joined: Tue May 13, 2008 11:10 pm
Location: siloam springs, AR

Re: Ring end Gap

Post by modkingfzr600 »

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.
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fink
Site Newbie
Posts: 7
Joined: Sun Jan 04, 2009 1:40 am

Re: Ring end Gap

Post by fink »

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?
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
modkingfzr600
100+ Posts
100+ Posts
Posts: 134
Joined: Tue May 13, 2008 11:10 pm
Location: siloam springs, AR

Re: Ring end Gap

Post by modkingfzr600 »

I have been seeing quite a few brand new sets on ebay lately for pocket change, i would look there first.
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fink
Site Newbie
Posts: 7
Joined: Sun Jan 04, 2009 1:40 am

Re: Ring end Gap

Post by fink »

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?
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
modkingfzr600
100+ Posts
100+ Posts
Posts: 134
Joined: Tue May 13, 2008 11:10 pm
Location: siloam springs, AR

Re: Ring end Gap

Post by modkingfzr600 »

well, if you can't find new ones on ebay ....... take a jar of vaseline and your wallet and go to the dealer.
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fink
Site Newbie
Posts: 7
Joined: Sun Jan 04, 2009 1:40 am

Re: Ring end Gap

Post by fink »

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.
90 FZR 600 - 63K miles, needs a cylinder head
94.5 ducati 916, 2002 KTM250, 1990 KDX200, 1991 GSF400 (needs carbs)
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