Copied from the WG forum.
Most Late Model Big Twins
Voltage Regulator:
Electrex part # RR51
Oil Filters:
Fram: PH6022 or PH3614
Mobil 1: M1-102
Deutsch: D-364
STP: S3614
Bosch: 3330
Super Tech: ST3614
Head Lamp Parts:
Big Light (Cal. Spec./Bassa/Jackal/v11 Sport) BMW R100/7 part #’s:
Chrome rim: 63 12 1 356 402
Reflector: 63 12 1 355 396
Lens: 63 12 1 358 147
Small Light (EV/Centauro) BMW R65/R850R part #’s
Chrome rim: 63 12 1 243 539
Reflector: 63 12 1 243 537
Lens: 63 12 1 243 541
Relays:
Radio Shack: 900-2391
Seimens: V23073
Bosch: 0 332 207 307
NAPA: AR 634
Car Quest: RY 620
Borg Warner: R3223
Orman: 68H-UA-007003
Mopar: 56006846
Brass Temp Sensor Holder:
Moto Guzzi # 3016 3301
Spark Plug Caps:
NGK: LB05EP 8020 (Black)
Gas Line Quick Connect
BMW Part # 1331 7659 120 & 1331 7659 119 (one male and one female)
Front Brake Micro Switch:
Cherry Electrical Products # DC1C-L1AA
Crankcase Breather Hose
NAPA Heater hose # 9811
Throttle Position Sensor:
Harley Davidson # 27271-95
Fuel Filter:
NAPA # 3008
AutoZone FF600
Napa 83008
Big “A” 95008
Hastings GF106
Wix 33008
Make sure you replace the aluminum washers or it might leak.