is upgrading to SE plugs worth the money...you think any better performance out of them....and while asking...how about the SE plug wires...thx
How do you define "better performance"? If you mean higher power output when compared to a fresh standard plug, the answer is definitely NO for both items. If you mean will performance degrade more slowly over time with platinum plugs, then the answer is a qualified "probably". The only advantage of the SE platinum plugs, other than to Harley's bottom line, is longer life. If you change plugs every 5k or 10k miles like most Harley riders, they are a waste of money. If you're the type to just run the plugs until the engine starts missing, then yes the platinum ones will maintain acceptable performance longer.
As for the wires, once again they won't add any power. The stock wires are just fine for a street bike - save your money.
Jerry