Re-use old rings?

Hmmm... Ok, maybe it's just me...But it doesn't seem you have the proper measurement tools on hand, maybe I'm wrong so please excuse if I'm miss understanding.

Example: I don't have the bore caliper to accurately measure the cylinder inside diameter either...

Since you obviously have the top end apart and have your cylinder off, wouldn't it be just as easy to take your cylinder and pistons (w/rings attached) to a motorcycle machinist and have the cylinder measured & confirmed to specifications?

NOTE: Some of these would be hard to answer unless you knew this guy and the bikes history....

Same time, was the compression tested before hand and was it within specifications?

Were you blowing smoke prior to taking this apart?

Pistons charred/carbon/scared?

Lacking power?

Do you know the history of this bike... How old are these pistons and rings if known? I realize "He said 900 miles" but... For only 900 miles, they should almost look fairly new...

Maybe it's time for a new top end upgrade... These are all the questions you need to ask/research.

Ok, I'm done now....

If the bike was running fine before you took it apart then you should be ok. Granted no guarantee's here but if compression was good, now excessive ringing noise (broken ring), they rotate on the piston, they're not burnt to a crisp or show signs of FUBAR then you should be ok.

OMR

BSKZ650 wrote:

I see there are a lot who would re use the rings, my fifty cents,, gas price increase, I would replace the rings and hone the cyls, its not that much money and then you know you should not have any problems with it

You mean you wouldn't even check the bore diameter to make sure honing it again wouldn't push it past the service limit and force you into an over bore?

Every time you hone a bore you make it a little bit larger, not a lot, but it was a used standard bore to begin with, and it's already been honed once.

BSKZ650 wrote:

I see there are a lot who would re use the rings, my fifty cents,, gas price increase, I would replace the rings and hone the cyls, its not that much money and then you know you should not have any problems with it

You mean you wouldn't even check the bore diameter to make sure honing it again wouldn't push it past the service limit and force you into an over bore?

Every time you hone a bore you make it a little bit larger, not a lot, but it was a used standard bore to begin with, and it's already been honed once.

The previous owner bored the cylinders, did a head job, and put new aftermarket pistons and rings in- he drove it 900 miles