What is the differenvce BP5HS vs BP5HA NGK

[1 SX]

Hi, quick question, what is the difference in-between these 2 sparkplugs

NGK BP5HA

NGk BP5HS

Is it just the HA is old part number / stock while the HS is the current 'replacement' for HA?
Thanks.

 

[HerrStig]

Bought a couple of NGKs for a BMW bike, the top contact is no longer removable. Using them would require changing Dieter's plug connectors, which are designed to fit over the threads exposed when the little cap contact is removed. The connectors are in fine shape. This is a plug type I have always known as the BP7EV.

 

[HerrStig]

Originally Posted By: SL2
Hi, quick question, what is the difference in-between these 2 sparkplugs

NGK BP5HA

NGk BP5HS

Is it just the HA is old part number / stock while the HS is the current 'replacement' for HA?
Thanks.
The NGK master catalog is on line. I don't know off hand what the difference between an HA and an HS is. I am curious, though. The heat range is the same.

"HA" means, acccording to the NGK site, a "special design tip, while HS is the "standard design. Looks like you ought to be using the HA for your particular vehicle if it is listed as such in your manual. There is a page on the NGK site listing all this info.

 

[Bottom_Feeder]

HA is 'Special Design' whatever that means

HS is 'Standard Type (2.5mm Center Electrode)'

At lest that's what the catalog chart says if I deciphered it correctly...

 

[dparm]

Originally Posted By: Bottom_Feeder
HA is 'Special Design' whatever that means

HS is 'Standard Type (2.5mm Center Electrode)'

At lest that's what the catalog chart says if I deciphered it correctly...



Correct.

The special design ones are generally an OEM-specific plug designed for a certain motor or application. There is almost always a generic equivalent available for about 1/4th the price.

 

[HerrStig]

Originally Posted By: dparm
Originally Posted By: Bottom_Feeder
HA is 'Special Design' whatever that means

HS is 'Standard Type (2.5mm Center Electrode)'

At lest that's what the catalog chart says if I deciphered it correctly...



Correct.

The special design ones are generally an OEM-specific plug designed for a certain motor or application. There is almost always a generic equivalent available for about 1/4th the price.
So where would you go to get generic data? "Same as" in the electronics industry is sometimes an a stretch.

 

[dparm]

You can figure out the generic by deciphering the part numbers, as someone did above. Bosch, NGK, and Denso have a "key" on their website.

 

[HerrStig]

Originally Posted By: dparm
You can figure out the generic by deciphering the part numbers, as someone did above. Bosch, NGK, and Denso have a "key" on their website.
I agree, I went to the site myself, but while we know what the regular tip is, becaise NGK describes it, NGK didn't supply any info as to the construction of the "special tip" which is what I would want to know to find a generic replacemment. It's probably a "precious metal" tip to meet an extended tuneup interval requirement but one would think that since NGK was the OEM they would make that clear instead of simply calling it a "special tip". Perhaps they don't want to make it easy to look elsewhere. Maybe the DENSO site has more info.

 

[1 SX]

So I received the BP5HS in the mail, perfect replacement for the bp4h I took out. All was A-Okay for 6 miles intill the little c clip holding the pin for the piston came off and major scoring of piston, rings, and locked up bottom end!!!! . A 1cent c clip just totaled my engine.