W/r/t "Will a later K motor fit in an earlier frame? I.E. a 52 - 53 frame?"
Yes, the KH is .346" taller than the K.
The earlier frame has a smaller rake angle, less high speed stability.
yard man wrote:panic wrote:Hi, welcome to the site.
The cams are easily identified as "K" etc. (but exactly which is more complicated, there are many different grinds, this site has the best information): they all have tapered lobes, taller facing you and smaller facing the engine.
The cylinders and heads you're looking for have casting numbers ending in "-54" (not "-52").
If original isn't important, you can use any frame after 1954(?) including iron Sportster through 1969.
Keep us posted as the build goes along.
Happy New Year!
Thanks! Will do. Will a later K motor fit in an earlier frame? I.E. a 52 - 53 frame?
panic wrote:W/r/t
The earlier frame has a smaller rake angle, less high speed stability.
yard man wrote:Yes if you wouldn’t mind, I would appreciate it. Just let me know how and where I can reach him
panic wrote:Tony Foale has written some interesting findings on the net.
His opinion: trail is far more important to stability than rake. He built a test bike with vertical forks and enough tree offset to get 3-4" of trail, and could be ridden with no hands.
Rake is still needed to cope with road surfaces.
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