[HondaRD]

I know this has been brought up before but I was curious if any significant gains have been felt from switching over from platinum plugs to copper on GSR's. I just installed a set of DENSO platinum plugs (Expensive I might add), but was wondering if it would be worth it to put in NGK coppers instead. This would pertain to a stock 95 GSR. Any thoughts??

 

[JiggyKooAndy]

no.

 

[GS-RRR]

no improvements what so ever. However, the stock units are the most reliable you can get. $65 for the set

 

[CanadianTeg]

Actually, if you are burning oil and your plugs get fouled now and then, ive found the coppers last a longer time before getting fouled than the platinums for some reason.

(yes, i know, im getting a ring and valve job to fix)

 

[roundle]

I'm a big fan of NGK coppers... but I wouldn't bother to change them until your current plugs are toast.

 

[kelly]

I use standard Bosch platinums. I have unscientifically compared them against standard electrode size copper core NGK's and the GSR OEM Denso platinums. They performed better than standard NGK's - smoother idle/response and I could tell no difference between them and OEM Densos. I open the gap up a little (.005") due to their lower arc over voltage. I believe they are the best bang for the buck plugs. These differences are slight, but to me, if I can tell a difference, it's significant. The price difference is certainly significant. Here are some dyno charts comparing plugs: click