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Yamaha RT1 1971 Reviews

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Eric Schrader


RIP Bobbles,

1. I bought the RT-1B new from Hollywood Yamaha in April, 1971 for list price ($925)

2. Modifications

3. Front hub is early YZ

4. Front forks have Terrykit dampening units, about 8” travel

5. The slider tubes are turned down to 1.750 diameter, I left two ears on for the attachment points for the fork brace

6. Front fender is a Yamaha part made for the 1985 TT600

7. Rear suspension is Works Performance gas emulsion shocks, about 7.5” wheel travel

8. I made the Aluminum (6061T6) swingarm, kickstand and brake tension bar

9. (I’m a machinist and did the work)

10. Preston Petty IT rear fender

11. Malcolm Smith 3.8 gal gas tank

12. Webco head

13. 1973 reed valve barrel

14. Bassani pipe with Skyway spark arrester

15. 32mm carburetor bored to 33.5 mm

16. Boost bottle (Yamaha started using them on their 1985 YZ490 and called it Y.E.I.S.)

17. I have two ignition coils, (one to each sparkplug) that are wired to a switch that controls which one fires

18. 12 volt halogen headlight

19. All the above mods were done over 20 years ago so they have stood the test of time

20. One mod that did not last was a set of straight cut gears. The large gear, attached to the clutch, wore out after about 10 years of use

21. Bottom line to the changes I have made; keep it street legal, reduce the bike’s weight and increase performance

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