Keep a strong, reliable spark firing across your classic bike's ignition with the DENSO Spark Plug 3043. It's a direct-fit replacement for a wide range of BMW, Kawasaki, and Yamaha motorcycles from the 1960s through the 1990s — a straightforward service part for the listed applications.
Core job: the plug carries ignition voltage to the electrode gap, where the spark ignites the compressed air-fuel mixture in the combustion chamber to fire each power stroke.
Direct-fit application: a straight replacement for the specific motorcycles listed in the Buyer's Guide below.
Signs a plug may need replacing: if a worn or fouled plug is the cause, you may notice rough idle, misfires, hard starting, or hesitation — diagnose the cause before replacing, since these symptoms can have other sources.
Interchange: W20EP-U · W20EPU · 83 50 076 · 8350076 · N01 781 178 · N01781178. Manufacturer part number 3043.
Fitment: 1983-1984 & 1991 BMW R100; 1976-1978 BMW R100/7; 1987-1995 BMW R100GS; 1992-1995 BMW R100R; 1988-1992 BMW R100RS; 1988-1995 BMW R100RT; 1969-1973 BMW R75/5; 1973-1976 BMW R75/6; 1976-1977 BMW R75/7; 1985-1987 BMW R80; 1980-1986 BMW R80G/S; 1982-1987 BMW R80RT; 1982-1984 BMW R80ST; 1973-1976 BMW R90/6; 1973-1976 BMW R90S; 1979-1982 KAWASAKI KZ1300; 1980 KAWASAKI KZ1300B; 1980-1981 YAMAHA SR500; 1985-1986 YAMAHA TY350; 1982 YAMAHA XJ1100 MAXIM; 1978-1981 YAMAHA XS1100; 1976-1977 YAMAHA XS360; 1980-1981 YAMAHA XT500; 1980-1985 YAMAHA YT125 TRI-MOTO. See the Buyer's Guide tab for the full list.
This part cross-references / interchanges with the following part numbers:
W20EP-U, 83 50 076, N01 781 178
Frequently Asked Questions
What does this spark plug do?
It delivers ignition voltage to the electrode gap, where the spark ignites the compressed air-fuel mixture in the combustion chamber to power each cycle.
Which motorcycles does the DENSO 3043 fit?
It's a direct-fit replacement for many BMW, Kawasaki, and Yamaha models, such as the BMW R100GS, R75/5, Kawasaki KZ1300, and Yamaha XS1100. See the Buyer's Guide tab for the complete list.
What are signs my spark plug may need replacing?
Rough idle, misfires, hard starting, or hesitation can indicate a worn or fouled plug. These symptoms can have other causes, so diagnose the source before replacing.
What numbers does this plug interchange with?
It cross-references to W20EP-U (W20EPU), 83 50 076 (8350076), and N01 781 178 (N01781178). Its own manufacturer part number is 3043.
Should I replace all of my spark plugs at once?
On a multi-cylinder engine it's common practice to replace the full set together so every cylinder fires from plugs at the same condition. Follow your service manual.
Spark Plug StandardPatented U-Groove technology on the ground electrode allows for a larger flame front and improved ignitability. Copper core center electrode for superior thermal conductivity...
WARNING:
These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to
www.P65Warnings.ca.gov.
