NGK BR4HS - Iridium or other upgrade?

Pablo · #1 01-13-2008, 10:00 AM

My 80cc takes a NGK BR4HS. Currently there is a Chinese cheesebo equivalent plug in there.

I was just wondering if anyone could cross reference the NGK BR4HS to an even "better" plug?

**paul** · #2 01-13-2008, 10:18 AM

here is a nice guide for cross referencing Spark Plug Part-Number Interchange Guide, Home
hope that helps. i do not know enough about each plug to recomend the best but lots of good info on that site

Pablo · #3 01-13-2008, 10:40 AM

Nice cross ref. - but not NGK - NGK cross. I love the guy's site though. Bookmarked!

**paul** · #4 01-13-2008, 11:34 AM

How about this chart pablo NGK Spark Plugs DENSO Spark Plugs Bosch Spark plugs Champion Spark Plugs at Wholesale Prices.

**Bikeguy Joe** · #5 01-13-2008, 06:32 PM

You can't get much worse than the plugs that come with these from China.
You can't get much better than an NGK.
Bosh platinum maybe....

Anything else is just throwing away money IMHO.

Pablo · #6 01-14-2008, 02:08 PM

Quote:

Originally Posted by Bikeguy Joe

You can't get much worse than the plugs that come with these from China.
You can't get much better than an NGK.
Bosh platinum maybe....

Anything else is just throwing away money IMHO.

Deadly correct.

I can even say that a Bosch Platinum is not better than an NGK.

Anyways I emailed NGK and they responded:

Quote:

Unfortunately at this time we do not have anything available. With the
1/2" thread reach plugs there are only standard nickel plugs available.
There is an iridium IX series BR6HIX available, but is so much colder
that it will most likely foul out pretty quickly. Thank you.

**Norman** · #7 01-17-2008, 01:27 PM

Guys
I'm still running the plug that came with the engines kit it starts right up and runs smooth with the nice brown color on its insulator. So find out whats a good one so when the time comes that I have to look for a new plug I won't have to look far and hard.
Norman

Pablo · #8 01-17-2008, 01:48 PM

I don't think you will go wrong with NGK. My instructions call for BR4HS. You could use this if you have a 70-80CC. Or non-resistor B4HS. OR you could step down one heat range to the B(R)5HS.

BR6HIX - I may try it.......

Easy Rider · #9 01-18-2008, 12:12 AM

I've used NGKs for many years/decades in my jetski, scooters and karts but as of last year I've switched to Autolites. I think NGK went thru a phase where their plugs were easily fouling up and going bad. (But that was 2 years ago) I found a box of B6HS plugs that are at least 10 years old. They are the ones with the gold/yellow coating. I've been using them in my bike. I know they are a colder and longer plug but it works fine and I have a little bit more bottom end.

MotorbikeMike · #10 01-18-2008, 12:23 AM

Hi the B6HS is a good plug for MOST of these engines, tho some may lack the clearance above.
In some of these engines, the stock plug does NOT fill all the threads.

2-strokes love colder plugs as long as they do not easily foull out.

Mike