Yep looks GOOD!! check out the picks! The Cylinder is from Millennium Technologies, you send them a piston to fit.
The piston was only 105mm, when I measured it the piston read 105.3mm was to hope it was to be a 730 but still i'm a happy with 720, walls look thick was worried about being too thin and the cylinder is nikasil coated.
Still getting parts for the head and wont be doing the top end untill I can do the whole motor in 1 shot. Text Millennium Technoligies
I also measured the wall thickness at the bottom of the Cylinder was 0.155" thick, heck that was thicker than the cylinder I sent them before the being sleeved.
I copied this list from the HPR web site
New cylinder VS re sleeved cylinder:
1. Horsepower: up to 3% loss by resleeving a plated cylinder (Mine is Plated Also)
2. Engine life: Cast iron and steel wear 10 times faster (Mine Is Aluminum and did I mention Plated also?)
3. Reliability: Sleeves can slip and turn in the bore (Again mine is Aluminum and will EXPAND at the same rate as the rest of the cylinder walls.)
4. Lubricity (thats the Nikasil and oh mine is coated also)
5. Cooling: Cast iron and steel don't transfer heat as efficiently (Good thing its Aluminum with a Nikasil coating see #03)
6. Design: Your cyl was plated for a reason from the factory (yep It sure is Plated.......nikasil dontcha know)
7. Strength: boring the stock jug leaves less than 0.080 wall thickness to hold the sleeve and transfer heat (Total wall thickness at the bottom base of teh cylinder is 0.155" and teh top is 0.230")
(heads up I bought another cylinder, im having this tig'd between the cylinder and the outer wall near each head bolt for support around the top of teh cylinder,( was quoted $300 for this weld and surface) resurfaced and then sent out to Millennium to be bored and plated ($225), im doing this one for more surface area for teh head gasket and I want to run a higher compression piston 13 to 1 or 14 to 1) be ready to try in the summer of 2007
8. Head gasket seal: boring the stock jug leaves little surface for the head gasket to seal .( I have 0.230" flat edge on top how much more do I need? what is stock on a DS? what is the surface area on the 730kit?)
9. Reputation: as of 9/16/05, HPR production cylinders boast ZERO failures since they were introduced (Millennium Technologies states in there web add We're so sure of our work, we stand behind it with a LIFETIME warranty) <--thats on the Coating only Folks! Com'on we need a little common sense here its a race motor, and how many venders will warrenty there parts ??

 

Your right.

 

I thought the 109s were midrange cams??

 

109's have top end increases but drop off quickly after peak with little over rev. They sacrifice on the bottom mostly and aren't really strong midrange cams, though adequate. A big bore will mask or bandaid some of the bottom and midrange deficiencies of the 109 grind.

 

 

Thanks for the props but that is an admitted exaggeration. I have some experience with 109's.

 

Here we go again, I can change em to 110s or go with 109/110 split also

 

We aren't going anywhere again. Just do what you want. Besides, what do I know. I never said there was anything wrong with 109's. I just described my experience with them. They are an improvement over stock and you got them for free. Some have even gotten away without buying the shim under bucket conversion. I don't know anyone that recommends it but you could try it.

Ron

 

I switched from 110's to 109's, didn't really notice a loss of botom end but did pickup an extra 1000 rpm. Iam using shim unders I'll try to get a printout of my last dyno run and post it so you can see how they worked on my bike. Yours may be different.