Dusty's Bonneville Scout Build

[Dusty-Dave]

proof of concept for the hydraulic clutch. The foot clutch worm moves the clutch .085" out, this first prototype moves .150"

Don't need much changing but must move the line fitting outboard and change the bore a little. I'll be laying down way too much for the foot clutch to be handy. Had originally planed on cable operated setup. but sumptin similar caught my eye.

Dusty

[Swamprabbit1]

[Dusty-Dave]

Back appart to enlarge the cylinder and make a new piston.


The cylinder is certainly a unhandy shape and size to machine

Dusty

[Dusty-Dave]

Got a little sumptin done this week


Dusty

[Dusty-Dave]

Started making the head studs out of grade 8 bolts. I'm cutting each one to be a tight fit in the cylinder. So far most are .002 to .0035 oversize.

Only a few more to half way. I'll have to trim the one over the intake manifold they are shorter than the rest.

Dusty

[Dusty-Dave]

know that there is a release bearing holder in that bar just got ta keep whittling.

Mocked up the primary and heads Cuz I had ta see.

Dusty

[Dusty-Dave]

Whittling the hex out with the mill down takes a little creative use of tools.

Dusty

[Dusty-Dave]

Trying out the hydraulic clutch release, it pulls heavy but releases clean enough to turn the output sprocket by hand with it in 1st gear. If it was a street bike I would increase the slave cylinder area. But I can live with it on a racer.

Dusty

[Dusty-Dave]

Got the squish set and the heads on and torqued.

Dusty

[Jeff L]

I had to go back through this thread, but couldn’t find anything about the heads except you saying they were done. Did you make them?

[Dusty-Dave]

I had the combustio0n chamber, gasket surface, bolt holes and plug holes CNCed at a machine shop in Los Alamos then a friend who works much cheaper ( a couple of bottles of Brandy) than the CNC shop and has a Bridgeport cut the fins and the top spot faces. They are Fortal HR which is a little stronger than 7075 and free cutting.
Dusty

[Dusty-Dave]

I think It needs a little more lift and duration so It's getting Schunk lobes

Just need to take the old lobes off. Good thing I got a 100 grit eraser



Two hours later It's almost gone.

Left .057 of the old lobe because the replacement is .057 thinner.

Dusty

[Dusty-Dave]

Made an A-dapter out of a 3/4" bolt to mount the S&S degree wheel to the Scout. Soon as I make a couple of drive pins and press the cams together it'll be time to index the cams.


Dusty

[Dusty-Dave]

Got the drive pins fitted and the gears and lobes pressed on the shafts I am using.

Dusty

[Dusty-Dave]

After 2 days of nothing making any sense I figured that the matched set of valve lifts had one exhaust lift that that was .090 shorter than the other. Think different ratio rocker arm on one valve Damn I hate e-bay sellers! Got that replaced with one out of my bucket of miss matched lift shafts. then a .100" offset pin retarding the rear cam made everything come out within a half degree.
Dusty