You have std pistons - my guess its a low use machine lap them in and call it a day - but picture it up what you did the guys will let you know the real deal good or bad first

stainless valves are for the gas we now use and will continue to use

 

Thanks for the info. I finished checking the jugs for roundness...well within spec. Will just order a new set of hastings std rings. I dont think I need anything larger. Bore - 3.435 was largest measurement checked with snap gauge in three locations per manual. Seems ok. Im gonna just ball hone as you suggested because they are super shiny in there.

 

Just checked my cylinders for roundness and I am getting a consistent measurement of 3.435 for both. That doesn't seem right when book says 3.438. I used 3 spots at 90° with snap gauge and calipers. HOW can my jugs be smaller than stock. I. Guessing calipers are off but they are definitely within spec so no need to bore. Just stock size rings after hone? I'll recheck after I hone them too.

 

It’s very easy to with a snap gage to come up long of short - if they are as you say seem round then ball hone and re ring and put it back together with the heads re done

 

Isn't a daily rider, run a ball hone thought a few shots to break the glaze and see if any bad spots show, cast rings and call it good if the wrist pin bushes are good. New keepers (spiral locks ) on the wrist pins and Cometic gaskets,

 

Will do for All. Thanks guys for all the input. Gonna order some rings tonight and hone them tomorrow. Oh yeah, finally got the valves out (had to get a compressor) and the exhaust valve is shot on front cylinder. Looks like someone tried to lap a new valve in at some point - unsuccessful. So they go tomorrow to local shop for work.

 

How about some pictures? You know we all like pictures.

 

Calipers can be off a couple thou, easy.. What do the pistons come in at?

 

Check the piston to cylinder clearance provided by the manufacturer so you know how much clearance they require. Usually .0015-.002 for cast pistons. And if you don't have good measuring equipment, get blade type feeler gauges (the longer ones are better for this use) and slide the piston in the cylinder starting with .001 gauge, going up to .002 to see if the piston still moves freely in the cylinder and you can pull the feeler gauge out without too much resistance.

If you are measuring the cylinders with snap gauges, you readings for roundness and taper my be off a fair amount.

Paul

 

will definitely post pics. The heads have been dropped off. Guy said valve guides with no seals were the culprit.

3.435 are my measurements. I figured they were off. Time for new calipers.