Got your cylinder, removed the aluminum then gave it a hone.

Aluminum removed gave it a lite hone using a ridged stone hone.

The cross hatch is the high spots.

Back in the hone tank and hone it a little more starting to get coverage

Back in the tank one more time for more hone finially real close to where the bore is useable, the bore measures 3.102 or 78.80mm they make a 79mm piston?

So if I can find a 79mm that'll work?? If so I'll call a few places to see what they've got.

Thanks again Hoser!

http://www.hondapartshouse.net/pages/parts/viewbybrand/7/Honda.aspx

They have a few listed as available, but I'm not exactly sure what one would be applicable.

Wiseco starts at 80mm

Someone refresh me what is the Honda pistons std bore size they do offer a .25mm and .50mm over sizes, are these still available?

STD is 78.5

here is an 80mm for 89.99! DIRT CHEAP they retail for about 140-150.. im not sure if it has rings, wristpin, bearings, or clips with it though.

http://cgi.ebay.com/ebaymotors/WISECO-P ... ccessories

First coice would be to see if you can still get the Honda piston.


Here is the honda part numbers, first try to get the .25mm
13012-VM0-305 RING SET, PISTON (0.25)
13102-VM0-315 PISTON (0.25)

If they cant get the .25mm then try to get the .50mm here is the numbers for the piston and ring.
13103-VM0-315 PISTON (0.50)
13013-VM0-305 RING SET, PISTON (0.50)

With either set you get you will also need the wrist pin, wrist pin bearing and the circlips those numbers are below.
13111-KA4-770 PIN, PISTON
91015-KZ3-003 BEARING, CONNECTING ROD SMALL END
90601-430-000 CLIP, PISTON PIN, 1.2X18 (NEED TWO OF THESE)

I think I have a .25 over Honda Piston that I did not use on the last bore Hoser did for me. I'll check later today.

that's right you do, see if you have rings also please.

That would be cool with me! I would rather give someone on here the money for parts then oder them from somewhere else. Just let me know and I could paypal you the cost.

Thanks

JP

Also I was wondering if I should be conserned about the bottom end? like any debris getting in there from the piston failure.

Take some pics of the bottom end, you have more pics of the old piston?

Look close into the bottom end for any forign material.

You can flush the bottom end too but its a mess, put a heavy rubber band through the rod and connect the ends to the cylinder studs to support the rod so it don't bang around, you can fill the bottom end with 2 stroke mix and rotate the Engine over by hand then dump it out, you want to do this outside and make sure the ignition is off don't need no spark to start a fire.

I might have 1 as well, I will look if needed.

Yep, I have a Honda Art 25 over piston.

Here are pics of the the rings I have. I don't know if they are 25 over but I'm sure someone on the board will know.

Service Honda site says the part number is 13012-VM0-305 RING SET, PISTON (0.25) wonder if numbers have changed over the years, it should say on the rings you will have to open the packages and look.

Stamped .25?

I'll look when I'm out in the de-rusting the cyl.

Yes they will be stamped by the ring end gap on one side or the other.

left side is .025 numbers,right side is .050.

13011 part numbers are for the std bore im pretty sure.

WTF?

Looked at all of the rings and in one of the boxes there was only one ring! I never opened it when it arrived. Damn e-bay thieves. It is stamped 25 so if anyone has a single ring we can make a matched set for Ride Red.

Only one ring, that sucks, never heard that one before, years ago a friend ordered .50 over size for a 350 and kept getting std. rings, after the first set if you looked close you could see where someone had opened the packages and swapped the rings then sealed them back up, had to happen some place in the Honda parts system, we assume someone had a bunch of std. rings they could not get rid of.

Honda still sell the .50 rings?

Hey again I am really appreciating all the help from all you guys! I just need to know who to pay what since there are a couple of you guys chiming in. And like I said before, I would DEFINITELY help you guys out before ordering from a parts store.

JP