Since I’ve actually started the disassembly so I’ll make this the last of the Prequels.
A few more details on the mechanic of the bike
Oil Injection – the pump is located next to the left side carb. The amount of oil that the engine receives is in direct proportion to how much throttle is applied and engine revs. The oil does mix with the case.
Sport-Shift – Located on the left side of the transmission. leaving it in the forward position and you can only use the standard 4 speeds. Move it to the back position engages the overdrive. The overdrive 5th gear extends the top speed of the Dual-Twin to 80-85 miles per hour. Normally when you stop a motorcycle you’ll need to shift back down through all the gears. The rotary shift pattern of the Bridgestone transmission, 1st gear can be engaged directly from 4th gear by just depressing the shift lever forward twice. This brings you through neutral to 1st gear. Additionally, it can be started in gear without going back to neutral.
I mentioned Bridgestone’s racing department. That research paid off as the 90 & 175 racers won the famed Daytona International race in 1966.
There are some more unique features but I think we’ll look at those (as well as the ones already mentioned) when we get to the disassembly.
For now I’ll get started with the restoration of the Dual Twin serial number 16D 07481.
16D 07481
Frame Number TA1 – 07554 (TA1 indicates a DT 175)
Serial No. 16D07481 (16 indicates DT 175 and the D indicates it was produced in April.
Thanks for reading and keep checking back for updates.
Tim
FB: John G. Gudenkauf: What year is the bike? Looks like a fun restoration project – Jill will love it when completed!
1966. Yes she will love it!!!
Is there a Prequel I ? Found you link on the BS web site. I don’t know that much about the 175/200 bikes so I’m looking forward to your restoration.
Thanks for dropping a note. Here is the first Prequel link.
The Bridgestone Project – Prequel I
http://wp.me/p2YxYx-3ib
This will be my first restoration of a motor cycle. I like the 175 Dual Twin because it’s pretty unique – Rotary Valves and 4 gear with overdrive and rotary shifting. I’m always looking for suggestion or expertise.
Regards
Tim