I always thought a B8HS was a B8HS, etc. I've seen plugs with/without the nut on top but figured there weren't many other options given size, heat range, reach etc. Apparently my pack of plugs has a way different gap from the factory than my usual prescribed gap. Like it's at 1mm (.039) I'm looking for .55mm (.022).
When I adjust the gap these plugs have a goofy looking strap.
Run em?
I've never seen a NGK B8HS with a factory gap like that. I don't know what I'd do. Probably be OK but that is unusual from what I have seen.
Lyn Garland
there was recently a discussion about this i -think- in the rd owners group page, and there were, indeed, depending on if it was by the automotive number or the 'b8hs' number, some variance on factory gapping. was news to me as well. From what i remember, the automotive only packaged ones were a wider gap. :twocents:
Well now I don't feel so dumb. If I wasn't going to use them for a plug chop I wouldn't even hesitate...
Yes, NGK makes a -11 number plug after the part # for a 1.1mm pre-gapped plug.
Chuck
Looks like NGK recommends less than .008" from standard FWIW.
speaking of plugs, NGK just discontinued the 400 plugs B8ES
is the 'r' still available?
Quote from: m in sc on April 02, 2020, 12:31:44 PM
is the 'r' still available?
According to the NGK site "
B8ES Has Been Discontinued And Replaced By BR8ES"
Well it looks like NGK just shot themselves in the foot...now there's no reason to buy NGK resister plug caps as I'll just use MSD non-resister plug caps and use the BR8ES plugs! Stupid....
Chuck
Quote from: SUPERTUNE on April 03, 2020, 01:05:13 AM
Well it looks like NGK just shot themselves in the foot... Stupid....
Chuck
I bet they could produce a financial spreadsheet that shows they're not ;D
I would have thought the B8ES to be the most common spark plug on the planet...but I guess my perspective is a bit focused
What about using more modern, exposed tip plugs, like NGK Iridium plugs?
They work well and I do use them on the Powerdynomo/Vape CDI's...just pricey at $7ea.
Most RD350 stock/point/coils are weak and will use them up faster...so the cheap plugs were great. About $3ea.
Chuck
I bet NGK sells way more plugs than plug caps, so the change, while not optimum for us, may be optimum for them.
Rob
This won't be issue for me until my B8ES stash runs out. I have at least 15-20 years worth on hand :dawg:
Also for owners of the RD125/RD200/RD250/RD350 it looks like the B8HS (aka NGK part #5510) is discontinued as well. The part is listed with life cycle attribute of "Available only while supplies last.", same as for the B8ES.
Quote from: SoCal250 on April 08, 2020, 07:02:37 PM
This won't be issue for me until my B8ES stash runs out. I have at least 15-20 years worth on hand :dawg:
Also for owners of the RD125/RD200/RD250/RD350 it looks like the B8HS (aka NGK part #5510) is discontinued as well. The part is listed with life cycle attribute of "Available only while supplies last.", same as for the B8ES.
Better get to the autozone and buy a bunch while I can.
What's a good alternative for a Vape system? I'm sure there's a few, but just curious.
The iridium plugs. BR8EIX for the 3/4 reach.
Or for the short 1/2 reach for RD250/350's use the BR8HIX
C
Autolite 4092 is what I run in the RD350 with good success. Cheap and readily available at AutoZone last I bought any.
A alternative maybe. -- http://lytleracinggroup.com/motorcycle/electrical/spark-plugs/moose-racing-atv-mx-utv-spark-plug-b8es/
Quote from: SUPERTUNE on April 08, 2020, 07:51:29 PM
The iridium plugs. BR8EIX for the 3/4 reach.
Or for the short 1/2 reach for RD250/350's use the BR8HIX
C
I run these. They are expensive but last forever. I have yet to fowl one.
Bummer. I just fouled my plugs and couldn't find any 5510's locally. Will BR8HS work for the RD350?
autolite 4092.
9 series but good.
I've had good success in the past with the Autolite Xtreme Sport Iridium Spark Plugs XS4063 and they cross reference to the stock NGK B8ES Plug
Luckily I found qty 14 B8HS plugs from two different store locations:) I guess I'm good for a little while. I have a 5 year old set of BR8HIX plugs that I've never used due to tuning/carb issues. Maybe I'll give them a go. I'm glad I saw this thread....thanks again!
Got a sealed 10 pack of Autolite 4092 in the mail today. I paid $9.50 with free shipping. The shipping cost on the envelope was $7.75. Feel like I robbed them
I know, old topic, but I think I have an interesting update. I asked my favorite local parts man about B8HS plugs, and he had four on hand (now I have four). I told him what I'd heard and read about the non-resistors going away, and he scoffed...until he started looking for them at other Carquest stores. Nationwide, he found, there are minimal quantities in stores and warehouses. Buy 'em while you can.
Yep, as I posted a year ago...
Quote from: SoCal250 on April 08, 2020, 07:02:37 PM
"Available only while supplies last."
I won't be needing any soon. This is maybe 1/3 of what I have on hand :dawg:
Jesus! I went to resistor plugs and non-resistor caps.
Quote from: SoCal250 on March 29, 2021, 03:21:19 PM
Yep, as I posted a year ago...
Quote from: SoCal250 on April 08, 2020, 07:02:37 PM
"Available only while supplies last."
I won't be needing any soon. This is maybe 1/3 of what I have on hand :dawg:
Were you the guy with all the TP a year ago?
Quote from: Czakky on March 29, 2021, 05:40:49 PM
Jesus! I went to resistor plugs and non-resistor caps.
That's what I plan.
Quote from: rodneya on March 29, 2021, 05:59:58 PM
Quote from: SoCal250 on March 29, 2021, 03:21:19 PM
Yep, as I posted a year ago...
Quote from: SoCal250 on April 08, 2020, 07:02:37 PM
"Available only while supplies last."
I won't be needing any soon. This is maybe 1/3 of what I have on hand :dawg:
Were you the guy with all the TP a year ago?
Ha!
i havent checked this out but might help.
https://www.sparkplug-crossreference.com/convert/NGK_PN/B8ES
My local NAPA has them in stock, and says they can get more. Most local NAPA stores show them in stock.
So if I'm capturing all this correctly, stock RD (or any motorcycle in the '70s probably) would have had no resistor in the plugs or caps - now the thing to do is (was) to run NGK resistor caps + stock B8ES plugs.
Since the B8ES is no longer made, use BR8ES + stock caps?
stock Japanese bikes had (typically) resistor caps stock.
I found an autolite specific "application" chart. You can lookup plugs for both the 350 / 400. The 350 plugs options appear to be only non-resistor. The 400 has both options.
https://www.autolitesparkplugs.com (https://www.autolitesparkplugs.com)
Under application drop-down list, select Powersports / Year / Vehicle type, etc.. When you get to the last drop-down, leave it at L---UK---. Select find parts and it will list compatible spark plugs.
IMPORTANT: After selecting which spark plug to look up, there will either be a RED or BLUE line above the selection. Blue is what you want to see. RED means the plug is incompatible for your ride. ( I just about missed that when looking up options for both bikes).
https://shop.advanceautoparts.com/p/ngk-iridium-ix-spark-plug-br8eix-5044/15650072-P
These work good.
You only need 2, so no complaints about cost.
When you go to the website it gives you a 20% off code as well.
M
Quote from: bhh1989 on March 31, 2021, 08:30:30 AM
So if I'm capturing all this correctly, stock RD (or any motorcycle in the '70s probably) would have had no resistor in the plugs or caps - now the thing to do is (was) to run NGK resistor caps + stock B8ES plugs.
Since the B8ES is no longer made, use BR8ES + stock caps?
No, they usually had resistor caps and plain plugs. With plain plugs getting scarce, you can use non-resistor caps (put a piece of copper in place of the resistor) and use resistor plugs.