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Regulator rectifier for many of the 70's Yamaha's with points type ignition. Battery not charging? Might be time to replace your rectifier regulator. The battery must be fully charged and in perfect working order before installing a new regulator rectifier.
This unit has a very consistent output and runs cooler than the original part due to the modern heat sink. The stable voltage output across the RPM range keeps the battery charged so you can ride with confidence!
Note:This unit replaces the stock regulator and rectifier which were commonly 2 separate units on most early points type ignition systems.
Note: Corroded / loose / damaged wiring is a common cause for charging system issues, make sure all connections are clean and secure. If the stock connector is brittle or melted and the terminals are corroded, it's best to replace them before installing the new part. This unit might not mount where the stock part was, check dimensions above.
Note: It is strongly recommended to isolate the charging issue prior to replacing the regulator / rectifier. With a bad battery, stator or wiring issues, a new RR will not charge the battery. A faulty stator or wiring can cause damage to the RR.
Wiring:
5 Pin Plug
3 white wires - Phase input from stator
1 black wire - Ground
1 red wire - Positive
2 Pin Plug
1 green wire - Switched ground from alternator field
1 grey wire - voltage sensing input from ignition switch
Fits Yamaha:
DS7 - 1972
RD250/A/B - 1973-1975
R5 - 1970-1972
RD350/A/B - 1973-1975
RD400C/D/E/F - 1976-1979
XS400/D/E/F - 1977-1979
TX650 - 1973
TX650A - 1974
XS1 - 1970
XS1B - 1971
XS2 - 1972
XS650_2F - 1979
XS650B - 1975
XS650D - 1977
XS650SE - 1978
XS650SE-11 - 1978
XS650SF - 1979
XS650SG - 1980
Mary White
Reviewed in the United States on August 3, 2020
Bought this for my 77’xs400Of course the regulator on my 79’xs650 decided to quit on “boys day out” swapped this puppy in with no issues! Works great !11-10-2029 UpdateThis unit lasted a whole 300 miles.Understand this is going on a completely rebuilt bike, made an inquirery to seller as to any warranty, response was a link on how to check my system. Yeah, I know how to use google......I swapped in this unit for the old style split reg/reg.
Robin Weeks
Reviewed in the United States on August 2, 2020
Physically looks like a decent part, casting, wires and connectors look to be of good quality. Hopefully it proves reliable over time.
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