Suzuki 2 Strokes

I found some NOS B77-HC plugs (OEM T500 plug) and know they've been discontinued for some time. I think the replacement plug is the B7HS. So my question is what's the difference between the two plugs? Thanks

I am not sure what the difference is.

You can still get B-77HC on eBay

I have run the B7HS. Now running the Iridium version of them BPR7HIX with caps without resistor

Denso makes some too and others


This is interesting http://www.ozebook.com/compendium/t500_ ... pspecs.htm" onclick="window.open(this.href);return false;

And NGK calls out B7hs

Full info on the NGK codes is here

http://www.ngksparkplugs.com/techinfo/s ... berkey.pdf" onclick="window.open(this.href);return false;

But as I understand it, the 77 was a bit cooler than the 7, but not as cool as the 8. The difference was small though (as I understand it)

I'm currently running 7s but have used 6s in the past with no problem (but no high speed highway stuff either, all small roads)

NGK says they were discontinued in 1983 and couldn't tell me the difference as their books don't go back that far.