Hi Scott and welcome to the Forum,
The basis of the bike is a Scrambler, a 250cc model first produced as 4-speed in 1964 and then continued with the 5-speed engine into 1967.
As to the engine, Ian Falloon writes,
"According to production data for 1965 and 1966, also included was a 350 Scrambler (these may have been Scramblers fitted with 350 Sebring motors)". However, I'm not aware of any other author (e.g Mick Walker or Tom Bailey) claiming the existence of a 350 narrow-case Scrambler. And I note how guarded Ian is with his wording
- "
according to production data",
"may have been".
As to the Sebring, it was made 1965-67. Again according to Ian Falloon, Sebring engine numbers start 01001, with +/- 1,000 being made each year. Which would make your engine from some time early-mid 1966.
As to the frame, there is a way to date this, assuming the forks are original. On the inner face of the lug that supports the brake plate, there is a code stamped. Up until 1965, this appears as first the week, then the year, e.g. 27 64. After 1965, it's the month and then the year, e.g 7 66.
Also in 1996, the rear wheel got smaller: 18" in place of 19".
Smart bike, especially when finished in black and silver. Go
http://www.motoscrubs.com/forum/viewtop ... f=3&t=2538
HTH
Craig