Okay, spark plug on my 87 RTL has ceased to be, which is the same as the one listed in my "owners manual, spare parts section", being an "NGK T2028-5", then on the next line it quotes "D6EA" ?

But then ealier in the book under "inspection.adjustment" it quotes "replacement plug :- "NGK D5ES" ?

Help, which one should i put in, and why would there be 3 variations of plug on the same bike, which do you recommend.

Thanks in advance.

Gaff.

Edited February 4, 200422 yr by Gaff

I always used a DPR6EA-9 in my RTL It has a projected tip and I think it will give you the best service. The platinum version would be DPR6EA-9EV. I rarely needed to replace the plug. I tried to remember to do it once a year. Any of those numbers you quoted will work, I just recommend the ones above. It is just not very critical which one you use. Unless you have an oil burning problem, the bike will run fine on any of those plugs.

Thanks DonD.

Gaff.