I really lost myself this weekend
Here's the breakdown for the noobs:
https://www.shopyamaha.com/yamalube-...-motor-company
(Sqrt(new vacuum level/known vacuum level))*known flow rate
Verbally that's the square root of the ratio of the new vacuum to the known vacuum level, and all that multiplied by the known flow rate.
So, my heads are 175 cfm at 10":
(Sqrt(28/10))*175 = 293 cfm, at .600" lift.
Last edited by Mattbastard; Feb 23, 2018 at 01:12 PM.
(Sqrt(new vacuum level/known vacuum level))*known flow rate
Verbally that's the square root of the ratio of the new vacuum to the known vacuum level, and all that multiplied by the known flow rate.
So, my heads are 175 cfm at 10":
(Sqrt(28/10))*175 = 293 cfm, at .600" lift.
Here's the build sheet:
They use a god knows how many axis CNC that's the size of a regular sized pick-up truck for all their head work.
The Best of Harley-Davidson for Lifelong Riders
Warmin' em' up for a few years while I go buy some Harbor Freight tire irons:
Now invent some new swear words working them off, then with liberal WD-40 use spoon the new ones on and WA-LAA!!
I ghetto-balanced them by chucking the axle up in the vice and supported the other end with some pipe, then play steering wheel with the tire to find the heavy spot and put weights on the light end. I've had a ZX-11 up to 170mph before doing this and it was smooth as glass so I'm sold.
Now I'm gonna work on getting them cylinders and pistons installed. Oh ****, forgot to buy dowels. Oh well, break out the Harbor Freight bearing puller set (Did I mention Harbor Freight is absolutely the best for the shop rat supplies?)
And ****!!!!!!!!!!!!!!!!!!!!!!!!
I made an assumption that the rod ends would be no wider than the Sportster. Low and behold, not gonna fit. As you can see there's not much that needs to come off. The piston's stuck there like that. I'd bet 20 thou would be plenty. My only beef is I'd like it to be milled off, not with a Dremel or something like that. Something that would leave a nice flat surface.










