Spark plugs for R1

[63stick]

Any recommendations for spark plugs for my R1. Some brands seem to perform better than others.

[mfg]

20 minutes ago, 63stick said:

Any recommendations for spark plugs for my R1. Some brands seem to perform better than others.

The Champion RJ12-Y’s I installed in my ‘63 R2 seem to go on forever!

[63stick]

The R2 takes different plugs though. I talked with Jon Meyer the other day and I think he said HR5. Unfortunately the piece of paper I wrote it on got brake cleaner on it and no more writing. I hate to call him back up.