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The piston are the short slot type but they are getting replaced anyway. Not sure how they occurred but there were gouge marks around the crown and on the skirt. Perhaps from a previous decarbon job?

htown16 wrote:The piston are the short slot type but they are getting replaced anyway. Not sure how they occurred but there were gouge marks around the crown and on the skirt. Perhaps from a previous decarbon job?

Or something got loose in there.

Slotted Piston.

Dave
69S

This is the short slot type that was in the engine. Note the damage around the crown. There is also some damage on the skirt.

More garage time
Crank back together with new hardware

New big end bearings and rods back on

Crankcases back together with a coat of Hondabond in between

Hustle it up and it'll be ready for New Ulm!

I doubt if this one makes it to New Ulm, but I am planning on riding the 70 Thunderbolt I just finished.

Should be a good rallye, as usual.

See you there.

I hope to attend the rally this year as well. Looking forward to meeting some of Ya'll.

Progress report
New vernier adjusters for the isolastics

Timing side put back together and engine and gear box installed back in the frame

Primary side

Seemed like a good time to install oil filter and lines

New bushings for swing arm

Swing arm reinstalled with new shocks and hardware

Next project is to get the rear wheel back together and make a roller out of it.

You DEFINITELY picked the right time to plumb the oil filter!

Looking good.

Progress report time.
Rear wheel and brake reassembled and installed.

Cylinders back from machinist with a +.040 overbore and honed. New pistons and rings ready to go in.

Checking ring gaps

Did the method of putting the pistons in the cylinders on the bench and then dropping over the rods and installing pins. Doing a semi-dry assembly, Just a few drops of oil smeared on the piston skirts.

Barrel all snugged down

Next project is getting the head all reassembled and back on.

I'm NOT going to be the one to say he will have to take it all apart to put the horn in

Jean

Ahh yes, that damned horn....seriously though, looking good htown16. Cj

I haven't put the battery tray in yet. Looks like you need to bolt the horn to it first before it goes in. Am I missing something?