TOPIC:

Can't wait, pretty over the top build.

pretty cool

I can build the first picture Mark, I was planning a build like it.
Mark

Id just stuff an 1197 kit in there,I wont tell anybody!

BohicaBob wrote: Yosh cams and valve springs/retainers can still be had, all it takes is (lots of) money!

Yosh Stuff

I am well aware of that site. The set of cams that I'm drooling over has the following specs:

Type ST-L2
MAX LIFT(mm) IN 10.00mm/EX 9.60mm [0.393701 inches intake/0.377953 inches exhaust]
1mm DURATION(°) IN 258°/EX 250°
Standard Tappet Clearance(mm) IN 0.20mm/EX 0.20mm [0.00787402 inches]

Pretty awesome, huh?

Mark Wing wrote: I can't wait to see some progress on this project.
I know where you can get it painted.
Mark

No doubt! I was thinking of stripping all of the paint off and just primering it for the time being. It'll be a good many months before I'm even ready to start thinking about paint.

BlackZ1R wrote: Wow, what a build. I'd be willing to bet that there are still a few sets of pistons stashed away in some of the team mechanics stashes.
You really went deep into the research and digging up of bona fied parts. The 4-4 would be over the top. Good job. Can't wait to see this one completed.

Yeah man, that 4-4 system would be mind-blowing. Imagine what that'd sound like at 10k rpm!!!

wireman wrote: Id just stuff an 1197 kit in there,I wont tell anybody!

Oh believe me, I thought about going that route. My displacement is set at 1015 cc's, so that can't change unfortunately. If you can't increase displacement, you have to increase your RPMs. I'm going to see what kind of sky-high RPM I can squeeze of of it. I don't think 11/12k is unattainable; with the proper modifications of course: increased oil capacity, windage tray, modified oil pump, Amsoil, oil cooler with thermostat, etc.

Anyone have any thoughts on this?

Dont get your face to close when it goes KABOOM

No doubt...

I'm looking into a Falicon crank and rods - haven't initiated any conversations just yet though. My plans are to get the frame, suspension, and brakes sorted out before working on the engine. The engine will be the largest money vacuum of my life thus far, so that's better off waiting until I have a clearer idea.

mtbspeedfreak wrote:

wireman wrote: Id just stuff an 1197 kit in there,I wont tell anybody!

Oh believe me, I thought about going that route. My displacement is set at 1015 cc's, so that can't change unfortunately. If you can't increase displacement, you have to increase your RPMs. I'm going to see what kind of sky-high RPM I can squeeze of of it. I don't think 11/12k is unattainable; with the proper modifications of course: increased oil capacity, windage tray, modified oil pump, Amsoil, oil cooler with thermostat, etc.

Anyone have any thoughts on this?

in order to make it breath at super high rpms is going to require one hell of a cylinder head"Hello Larry Cav".
The biggest problem with running these 900/1000 based motors is the same thing that makes them so tough under normal use!
Its the roller bearings in the crankshaft,once you start bouncing off 10,000 rpm range the bearings basically want to leave their happy little orbit and get thrown up against the outer bearing race and just quit rolling.
And if their not rolling their basically sliding/being drug along for the ride which is really tough on them like towing a car with emergency brake on.
On drag bikes that are doing this for a few seconds at a time it could take a long time to kill it,a bike running around a track in a circle with throttle pinned would kill it a lot sooner.
also do you think those old cast yosh pistons will take that kind of abuse?Id atleast have them dye checked for stress cracks even if theyre brand new.