This is correct, these Pistons are in field testing as we speak. These are the 117" TTS pistons. They are forged 4032 material. This material allows tighter piston to wall clearences You can tell the difference between the 120 and 117 by the casting numbers in the cylinders.

 

Here's the pistons ins a 120" set up. Note the casting numbers on the cylinders

 

We've been testing for quite sometime on these as it's not worth anything, to post numbers if they are not going to be real, in the end. Once the next tear down happens we will have right at 5000 miles in and can see if everything is still working fine. I can only say at this point is things are looking very good so far and we do not expect any problems. These pistons are set for 11:1 compression ratio on both displacements.

 

They were in the Wiseco booth... These are the two photos I took of them, and spoke with the R&D guy there for about an hour. He never mentioned the work required to the cylinders heads for fitment.

K.

 

A little late to the party. Thanks guys for all the info. I've been waiting for months for products to come out. I'm going to do something to the new M-8, just trying to see all my options. There's some good reading here. I sure like to see some more non EPA cams come to market.

 

Great work Steve I have not been online much so I missed all this

 

Yep, those are the ones. Yes, you have to some how get the passageways plugged in the heads to prevent leakage. Like I said not a big deal there but just some extra work. What I'm not so sure of, is the boring of the cylinder out for the sleeve. HD sleeves have a raised ridge on the OD of the sleeve about every 3/8" spaced all down the length of the sleeve. Just image rings on the OD of the sleeve every 1/2" from top to bottom. When you bore for the new sleeve these are left in the AL casting so the new sleeve does not have the surface contact to the AL like it started with. While most likely not a problem for an engine that is not running for long periods of time, IMHO I do not think it's going to hold up for a bike that gets used for long rides or higher heat conditions. The sleeve just no longer has the surface contact to the AL part of the casting as a stock cylinder does. Without this, its not going to get the heat out of the cylinder as well as before.

 

Lots of good information here, Steve! When I was at the show in Cincy I only spoke with the R&D engineer at the Wiseco table about the setup. Now seeing what you're posting here, it would be nice to talk with both someone from Advanced Sleeve and someone from Cometic (Delkron) as well...

K.

 

Advance Sleeve just makes sleeve's and lots of them. I doubt if they reall have much to do with this installation. Cometic makes the head gakets for them and if you look back at the pictures I post of the head and gasket sealing you can see the problem area, as the embossing for seal the water/oil passageway almost hit the cylinder seal and that gasket is only for 4.125" bore and smaller. When you make the hole bigger (4.250") the embossing has to move out and there is no room unless you get to move something else.

 

Bump.
Peace , bump safe !