Hello Everyone,
If I remove my cylinders to replace the base gaskets, when I replace the cylinders will the rings take their normal seated position? Or will I need to reseat them?
I wasn't going to replace the rings because I'm getting good compression, 153 and 155 psi.
Thanks.
Here's a photo for your viewing pleasure.

 

If you take the cylinder off the pistons then no, they will not reseat satisfactorily with or without honing.

Two options;
1 - slide the cylinders up carefully until you can remove a wrist pin retainer, slide the pin out and leave piston in cylinder. Install new retaining ring on assembly. You'll have to push the rear piston all the way back in to get the cylinder off because of the studs.
2 - remove the cylinders as normal, hone with a ball flex type (240-260 grit) install new rings.

 

I personally think you need to hit the cylinders with a stone and replace rings. I sure would check the valves and replace seals also along with breather poppets if it's a top breather.

Unless I was going to do that, I would just wipe of it's slobbering unless it's leaking bad.

 

Thanks.
The base gaskets don't leak excessively, I just thought I'd replace them because I'm going to be pulling the heads for valve work.

 

Have your machinist true the bottoms of the cylinders, this will go a long way in preventing future base gasket leaks.

I like the idea of at least ball honing the cylinders and re-ringing.

 

When you pull the heads, you have no choice but to replace the base gaskets. Well, actually you do have a choice - replace or leave them alone. But you will have leaking base gaskets if you do the latter...

 

OP ... Good advice here... You're already in there ... light hone ( ball hone is good too ) and a new set of rings will serve you well .. Remember, EVO's like a bit of heat ( warm up ) for long life base gaskets

 

True to that!!

 

plane the cylinder bases too...

 

During reassembly use steel base and head gaskets.
I have used both Cometic and James with excellent results.