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Yamaha RD400 C,D,E USA model fork spring length

Started by stresa, January 16, 2026, 07:44:14 AM

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stresa

January 16, 2026, 07:44:14 AM
Hi guys,
how long is the RD400 1A1 fork spring please?
We have a discussion over here as the owner of a USA 1A1 thinks that the fork inners are different to the European 1A3 model.
Regards Uwe
81 Jackson Special 250, 2x 74 Yamaha RD250 352 racer, 78 Yamaha RD400 2R9, 77 Yamaha RD400 1A1, 72 R5/RD350 rat, 74 RD250 streettracker, 72 DS7, 75 Yapol TZ250, 89 Honda RS125,
80 Hejira TM250, 77 Höpfner-TD3, 76 RD/TD3,
75 Yamaha TZ/RD250A, 78 Siroko TZ250, 80 TZ350G, Tomic 200

1976RD400C

#1
January 16, 2026, 09:55:10 AM
15 3/8"
'76 RD400 green  '76 RD400 red   '84 RZ350

stresa

#2
January 16, 2026, 08:00:35 PM
@1976RD400C
Many thanks! If you have the length of the spacer also would be great.
Regards Uwe
81 Jackson Special 250, 2x 74 Yamaha RD250 352 racer, 78 Yamaha RD400 2R9, 77 Yamaha RD400 1A1, 72 R5/RD350 rat, 74 RD250 streettracker, 72 DS7, 75 Yapol TZ250, 89 Honda RS125,
80 Hejira TM250, 77 Höpfner-TD3, 76 RD/TD3,
75 Yamaha TZ/RD250A, 78 Siroko TZ250, 80 TZ350G, Tomic 200

1976RD400C

#3
January 17, 2026, 08:44:52 AM
oem spacer is 2 3/16"
'76 RD400 green  '76 RD400 red   '84 RZ350

stresa

#4
January 17, 2026, 05:36:27 PM
Many thanks!!! :olaf:
81 Jackson Special 250, 2x 74 Yamaha RD250 352 racer, 78 Yamaha RD400 2R9, 77 Yamaha RD400 1A1, 72 R5/RD350 rat, 74 RD250 streettracker, 72 DS7, 75 Yapol TZ250, 89 Honda RS125,
80 Hejira TM250, 77 Höpfner-TD3, 76 RD/TD3,
75 Yamaha TZ/RD250A, 78 Siroko TZ250, 80 TZ350G, Tomic 200
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