Searched the forum. Couldn't find much of anything..
Any experience good or bad with these in Bikes or Cages?

 

gimmick. any new plug is likely to run better than a worn plug. platinum is a poor conductor which slows down material transfer (wear). i've had best results with Autolite iron plugs or NGK copper. all high dollar plugs do is lighten your wallet.

 

Figured as much..

BUT with a lighter wallet I may go faster!

 

If this theory is true, then after what my ex-wife did ...... I shoud be at light speed or there'bouts ......

 

Ouch
Struck a nerve with me too.
Working on a divorce for 7 years.
She wants lifetime maintenance...

Wait till she finds out what I bought my bike with!!

 

I tried them and no different than stock.

 

http://www.cyclesolutionsonline.com/...park_Plugs.htm

I do not know if the youtube video and/or the dyno graphs are entirely reliable but take this as additional information only. I purchased these plugs from amazon.com for a great price but notice no better or worse change. Just likely to keep them in longer.

 

Plain copper plugs perform better than platinum, they just wear quicker. I was curious about the E3 plugs also, ended up going with E3 tires instead, better investment.

 

Tried E3 plugs in a 79 shovel. Second ride after, bike was not rideable. Thought S-S carb was the problem. Tore carb apart and all looked good.Put old plug's back in and ran perfect again. I do not reccomend.