stage 2? flathead build

[jmaack]

Starting with a 133432 industrial plus block. Cast sleeve bearing.


Removing governor, billet flywheel and rod.

Going to try and get head welded a bit and milled.

Will be going on cc100x for now until I find a small vintage bike.

 

[jmaack]

Not 100% sold but will possibly be using raptor carb on it. I don't know if i want to do a flat slide.

 

[jmaack]

fun power crank.

 

[Denny]

Interesting. I’m intrigued.

 

[jmaack]

Someone correct me if I'm wrong. I seem to remember reading somewhere a bushing crank can take a bearing, you just have to have the correct size being small or large. Right?
my 96 should be large

 

[Denny]

Your going to need to talk to Karl on that.

 

[jmaack]

I might be thinking of trick bearing. It's late my mind isn't working it's best. I'll dig in to it tomorrow after work when I can mic it. LooKs to be 1 inch.

 

[jmaack]

Your going to need to talk to Karl on that.

I have been reading some of his posts already.

 

[jmaack]

This one is getting the 1974 shroud, doubt I'll use the recoil as I don't have the right crank. Not an issue imo.

 

[karl]

my 96 should be large

Yeah this is what ya need

https://www.arcracing.com/555050-b-s-pto-crankshaft-bearing-5hp-flathead-model-13/

Cool stuff!

 

[jmaack]

Quick carb clean. Looks like this saw some mud in its life. Gonna do a good soak and clean through out the week.

Unmolested and tight.

 

[Denny]

You should not molest a carburetor, bad things could happen to you.

 

[jmaack]

You should not molest a carburetor, bad things could happen to you.

Truth. It has some sharp edges.

I was afraid like mentioned in another thread holes enlarged for alcohol. Looks like this was run on gas.

 

[Denny]

Cool, I just didn’t want to see you have to register on a list some where. No one wants to see you have to be a registered “Carb Molester”.

 

[madprofessor]

 

[jmaack]

Put a bid on a NOS raptor piston. I'd rather use a performance std bore but my search is coming up light. Any recommendations?
Undecided on rod length piston also. First time building a flathead.

 

[karl]

Yeah it starts .010 over, local shop quoted $97.50 to punch out and hone up to 2mm over.

https://burrisracing.com/shop/?route=product/product&product_id=475

For stock style still in production , might want to look at burris.

Wiseco still makes pistons, but are mostly way overside, and meant for longer connecting rods.
One of mine has a wiseco domed piston, long horstman h-beam rod, and matching horstman cylinder head.

 

[jmaack]

Eh probably too extreme for what I have planned for it. Will be using nos raptor piston. Offer of 10.00 accepted. Will just use billet rod and flywheel.

 

[jmaack]

fml.....

 

[jmaack]

Makes me sick to my stomach. I might be using this block instead..

Have everything ready to clean all my grungy weathered shrouds.

How important is that last fin? I jb welded it. But if when I clean off it looks like he'll ibmight just grind it off and soften up around side of block.