Flathead cams

ok....this is how we did it back in the day....absolutly no speed parts available...had to "wing" everything.........

i am going to assume you are very handy with tools and measurement devices....

first is determine the lift that you want....
use a stock cam and see what the lift is........
if you want .002 more lift......remove that amount from the HEEL of the cam....
i know, iknow, when you do that the hardness of the heel will be removed....but, if ya think about it, there is no pressure on the heel of the cam, it is all on the rise and fall of the cam....you set your lifters with the cam in the lowest position...where there is no pressure.
when removing the metal, do it slowly....and evenly....and you have to polish it also,,,,or it will wear the lifter out......hope this helps.......

:roflmao: :roflmao: :roflmao:

when i started messin with this stuff, ya couldnt go to a catalog or "boutique" to get custom/highpreformance parts......sooooo ya had to do what ya had to do....it seemed to work. no different today, it is just mass produced by machines......full circle....

We drilled some real small holes in the piston skirts to help with oil , can't seem to remember all for what , & lost the hand writen stuff 25 years ago in A huracane

Dang I knew y'all were old cause ya rode baggers but I didn't know y'all were that friggin old!

Not to push you off here, there are some knowledgeable people,

However you might also find some help at HTT, it is one of the larger performance boards, and there is a specific Knuck/FlatHead section

There are still companies out there that make parts for the older motors, just got to find the right ones.

Then again you might be doing Like chuck said on the cams and modify them or maybe there is a way to change flywheel, rods, pistons to make it a "stroker"

Ya have to wonder how much power you can make out of a 45.

JMO I'd put it back to stock and ride it slow, cruise and get me a big ol motor'd newer bike if I want to go fast....

Nah I've never done that... always messing with the motor...

Buddy said it right, - stock is best- reliable, smooth running, no problems.

two listed sites for 45 stuff.
45 Parts Depot
45 Restoration Company Inc.



SNS Flathead Power site

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Bain

More Flathead sources,

T&O makes Flathead stroker flywheels. They'll even assemble your stroker lower end for you. Truett & Osborn Cycle

There is a book that is about to be released that gives tested modifications to Flathead oil pumps and shows how to install piston squirters. This should cure the short lifespan of Flathead top ends. Home

For someone who has done Flathead oil pump mods and has the modification pictures on his website try: The Bikes ::

One of my friends who recently built a Flathead told me that he never spent so much money to go so slow.

a very true statement hrk!!!!!!:roflmao:

Nuther guy said his was a model 45/45/45

1945
45 CUI
45 MPH