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80mm cylinder
http://www.pilotodyssey.com/PO/viewtopic.php?f=24&t=10609
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Author:  hoser [ Wed Aug 01, 2012 6:40 pm ]
Post subject:  Re: 80mm cylinder

rocket wrote:
I was not the one who removed the exhaust bridge, it was aready done when I bought the machine. I've been running it hard for about 4 years and it was a used Engine at that point.
This is the first time being into the Engine since I bought it. Everyone is saying it needs the
bridge, but I don't see anthing bad going on with it not being there. Even though the piston,
rings, and bore look a little rough from eating sand. Everything looks pretty good for being as old as the Engine is.



Keep working on the pics of the rings, try different lighting natural and indoor lighting different angles and different camera settings you will get them its not uncommon for me to take 10 pictures of a Engine part to get one presentable picture to post here in my articles.

If the wear on the rings is even all around from all sides including top and bottom and the ring grooves are worn even I would not worry about the missing bridge you have PROVEN it works, if their was unusual wear on the piston or rings NOW is the time to discover it then use your last rebuild as a guide to when you need to pull the top end off for a inspection and rebuild.

So thinking back about how many hours did you put on the last rebuild OR about how many gallons of gas did you run through the last rebuild figure it out write this down so you know...

Do me/us a favor and port map that cylinder please see this article its real easy it would be nice to see what we can get away with on that exhaust port http://www.macdizzy.com/cylinder_map.htm I know what I can get away with on the Pilot just not the Odyssey.

You can or could modify the new piston to match the old piston and or drill or mill out material like wiseco use to do to make the piston lighter just be careful and don't drill the wholes all the way through where they are just a pocket on the old piston :shock: I want to make a jig and at lease start drilling a hole above the wrist pin on both sides of the piston.

Thanks

Author:  rocket [ Wed Aug 01, 2012 6:56 pm ]
Post subject:  Re: 80mm cylinder

I got my parts ordered today, and while waiting for them to show up I started cleaning the carb and other parts. Hoser is 100% correct when he says K&N filters are junk. I had sand
under the reeds, in the carb, pretty much everywhere. That filter is going in the trash unless
I end up using it as a Pre filter. I got to scrounge up a stock box, I chopped the one that came with the Oddy to modify the air box on my wifes Oddy.
Thanks again Hoser for the info, I would have left that K&N on the new Engine and trashed it also.

Author:  rocket [ Wed Aug 01, 2012 7:05 pm ]
Post subject:  Re: 80mm cylinder

I tried and tried to get some pics of the rings they just won't come out. Wear was even on everything, so I'm not concerned with the bridge being gone. I'll look at the web site you sent me, and I'll see what I can get done. Be patient with me, I'm as dumb as it gets when it comes to playing on this computer. I guess I should have had kids, then I could get a three year old to help me through the hard parts.

Author:  rocket [ Fri Aug 03, 2012 7:05 am ]
Post subject:  Re: 80mm cylinder

I'll try to do the port mapping to day and get it posted tonight. If any of you guys have a stock air-box that's not chopped up to bad and want to get rid of it please let me know... Sorry I'm being a sexest again... if any of you GALs
are wanting your box put to good use let me know.

Author:  rocket [ Fri Aug 03, 2012 10:08 am ]
Post subject:  Re: 80mm cylinder

Here is the port map of the my exhaust port. The bore on my cylinder is 82mm. I don't know what size the bore was when it was originally ported. The ports are tapered pretty good, and
if it has been bored since the port job, the port size has gotten bigger. All I know is it works at these dim. I don't know if the pic is going to come out 100% origional in size so I put a 4"
reference tape on the picture so you can resize it if you need to. The measurements were
taken of the port with the paper lying flat on a table port dim. are 2.575" wide / 1.335" tall.
Hope this helps, if not let me know soon, because as soon as the parts are delivered this thing is going back together.

Attachments:
port 001.jpg
port 001.jpg [ 10.27 KiB | Viewed 4676 times ]

Author:  Fatcat [ Fri Aug 03, 2012 10:45 am ]
Post subject:  Re: 80mm cylinder

If your at 82mm have you considered getting your cylinder plated? I think it's called nicasil? Does it work Hoser? I think the new honda 450r's use it? That cylinder is on its final bore. Anything you can do to increase life and hold off the $300++ resleeve

Author:  nitrosport_5 [ Fri Aug 03, 2012 1:33 pm ]
Post subject:  Re: 80mm cylinder

i have a stock airbox, just missing the elbow. ill have to dig it out of my shed. if you are interested let me know

Author:  rocket [ Fri Aug 03, 2012 2:09 pm ]
Post subject:  Re: 80mm cylinder

Yes I'm interested, I still have my elbow. how much?

Author:  rocket [ Sun Aug 05, 2012 6:36 am ]
Post subject:  Re: 80mm cylinder

I got a reply back from NELLY, he has a clutch and air box he's giving me a package deal on, thanks anyway

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