I guess I've ridden them all, 1970s Scramblers, 1980s cafe` racers, 1990s sportsters, and BMW autobahn burners...
This is my advice.
On a cafe` racer, the front fork must be as vertical as possible, and the triple tree must be tall enough to allow plenty of room for adjustment.
On a 1960s cafe` racer, the fuel tank was often contoured "backwards", with the streamlined end looking forwards, and the fatter end at the back; this allowed for ample room for your wrists when negotiating tight bends.
On a cafe` racer, the footpegs must be no further forward than your hip joint, and that is a must! More often than not, on a true cafe racer the footpegs would be up to 6" behind the rider's hip joint, depending on riding style and type of route/track to be raced.
On a cafe` racer, the rear mudguard/fender would be round and go all the way back (i.e., no ducktail fender as on the Savage) I'm sure you can source one, and make sure the taillight is small and round.
On a cafe` racer, the exhaust would be sweeping low and the silencer would reach back horizontally (1950s and 1960s) or point upwards but just a tab (1970s). Avoid that ugly tendency to design a wonderful cafe` racer, and then sopiling it all with a "scrambler" exhaust.
Now, another point: You have a Savage, which is a great little cruiser and a HD-Sportster lookalike that is better than the original in many ways.
Are you sure you wouldn't be better off starting from an original street-going single?
Excellent pictures to copy from can be found Googling :
- "Ace Cafe London"
- "Ducati Cafe Racers"
- "Norton Manx"
- "Ducati desmo singles"
- "Royal Enfield Bullet"
This is an example of what you can find
Original Ducati 450 "S" Desmo single
Yamaha XT 550 converted to cafe` racer - see how raked the front end is
MV Agusta 350 Ipotesi, the Holy Grail of cafe racers (twins)
Honda 500cc single cafe` racer
Yamaha XT Enduro converted to cafe` racer
Yamaha SRX cafe` racer - same engine as the XT 600 but chassis etc. made for the road (looks like a twin but is actually a single)
The Real McCoy, the one and only, Royal Enfield Bullet Cafe` Racer

Mind you, if you could find a front fork with a credible drum brake, that would really cut it !!!