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Any rectifier with a "BT" part number has been made or assembled on site.
I personally assemble each rectifier using the best parts that I can source with:
sturdy ABS connectors, 16 gauge high temperature GXL wire, PVC wire sleeving, 3 to 1 heat shrink (with glue)
and heavy duty silicone rectifiers (50 amp)
50 AMP HONDA RECTIFIERS
click on photo for eBay listing:
BT1
Plain Jane replacement rectifier, the "Radio Shack"
BT2
Universal Rectifier With 10" Leads
BT3
Fits early CB100, CL100, SL100 & SL125 models
Replaces Honda Part Numbers
31700-107-782
BT4
Replaces Honda PNs
31700-455-671
31700-358-305
31700-292-008
BT5
Fits 4 wire CT90 rectifiers (1968 to 1974)
Replaces Honda PNs
31700-033-000
31700-102-701
BT6
Fits SL 90 & 350,CD CL CA 125 175 older XL models: 100s, 125s, 185s, 250 and 350
Replaces Honda PNs
31700-235-000
31700-235-305
BT7
Fits later CT90 models also fits most CB 125 XL 100 and CL 125 models
Replaces Honda PN
31700-102-731
BT8
Honda Rectifier For K0 CT90 CM90 CT200
Replaces Honda PN
31700-033-00
BT9
Heavy-duty half-wave fits early CT70 SL70 Z50
Replaces Honda PNs
31700-098-921
31700-048-671
31700-098-305
BT10
For MR 50 175 250 Elsinore
Replaces Honda PN
31700-131-008
AFM001 Aftermarket half-wave rectifier
Replaces Honda PN
31700-124-003
AFM002
Fits later CT90 and most CB 125 XL 100 and CL 125 models
Aftermarket unit
Replaces Honda PN
31700-102-731