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Found 4 results

  1. ThumperTalk

    Yamaha RT1 1970

    0 reviews

    MOTORCYCLE TYPE Enduro ENGINE SPECIFICATIONS Displacement (cc): 358 Cylinders: 1 Engine Stroke: 2 Speeds: 6 Speed TRANSMISSION SPECIFICATIONS Number of speeds: 6 Speed Dry Weight (lbs.): 267
  2. Eric Schrader

    Yamaha RT1 (1971)

    0 comments

    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
  3. Eric Schrader

    Yamaha RT1 (1971)

    0 comments

    Webco head 1974 Head with read cage Lowered rear end shocks Front Conical hub off a 1974 RT 400 "H" Style rims To Do: Add Bossani pipe/ rejet charb (my dad saids its already loud enough) Get it running smoother Convert lighting from 6v to 12v system
  4. ThumperTalk

    Yamaha RT1 1971

    1 review

    MOTORCYCLE TYPE Enduro ENGINE SPECIFICATIONS Displacement (cc): 358 Cylinders: 1 Engine Stroke: 2 Speeds: 6 Speed TRANSMISSION SPECIFICATIONS Number of speeds: 6 Speed Dry Weight (lbs.): 267
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