my new wiseco master catalog says 2014 on it and unless its a miss print I don't see anything for his bore and stroke except 9.5:1

 

i see on flea bay from time to time older stuff some from 20 years ago and he is in japan NO telling what he has my guess his stuff is now the latest available

and a reason exist Y they only sell 9 and change to 1 pistons but i am not going their

 

The cylinders and pistons are standard bore 3.498. I have no idea when they were purchased, probably 4 -8 years ago, and don't know where. I am not sure if they will work with my set up. I traded some used tins that I had laying around for the cylinders, pistons and heads--all new. I figured I couldn't go wrong since I got the fenders and gas tank with the purchase of the bike, in addition to a truckload (and Jeep load) of parts.

 

if they really are 10.5:1 and not the SE ones and stock bore what do you want for them.

 

post a few pictures / and one measurment

Photo the top of the the piston - i want to see the dome shape and size < thickness

and the side looking at the wrist pin straight out in front of you photo holding it

if you could also use a ruler in inches if possable but i can convert metric - measure the center of the wrist pin hole in the piston ///// to the top of the piston //// do not include any dome -- it does not have to be super super accurate just close

with that info / and pictures i can tell you what you have

 

As soon as I get them in my hands, I will take pictures. I am awaiting them via delivery today or tomorrow.

 

I like this forum because there are a lot of knowledgeable individuals, but each has his own ideas about what will or will not work. Now, I want to ask, what is probably a dumb or unanswerable question: How do you find out what works together? Is this through trial and error, books or knowledge that has been passed down. You all have me intrigued over this compression and stroke issue. Is there a good book where one can gain more insight on this? Having limited Japanese language ability, its difficult to run down to the local machinist or HD shop and ask questions.

 

One of the better books on performance mods you will find.

This site has a LOT of info, also.
http://www.nightrider.com/biketech/hplist_evo80.htm
Checkout the Evolution 80 & the Evolution Unlimited section .
Do your homework.

Ride Safe,
Harold

 

Thanks LRH! I think I will use my Amazon gift card and purchase this book.I think I am a little late in life to become an HD mechanic, but having revived my old Ultra has peaked a lot of interest into the unknown. This thread alone has given me a lot of insight bore and stroke, compression ratios, etc. Having been somewhat of a math/science junkie, this all seems to make sense when you add in fuel delivery and quality. I am now curious as to how to put all of this nonsense together to have some meaning. Johnjzjz--I will try to get pictures before I leave, but we have a storm headed our way and my delivery will likely be delayed and I am headed on my annual, 40 day Pilgrimage to God's country, Texas.