Swapped Hawk 250 Stock Spark Plug for NGK Iridium - Page 2

Azhule · 06-07-2016, 09:26 PM

They both should work just the same

http://www.sparkplug-crossreference..../DENSO_PN/5730

kohburn · 06-07-2016, 10:28 PM

Quote:

Originally Posted by kd2dxf

You got the wrong plug. I made this mistake. You should have got the NGK DR8EIX. Here is a pic of the right one

ah that could make a difference too - the DPR8EIX is one rage colder than the DR8EIX

http://www.ngk.com.au/spark-plugs/te...ge-explanation

colder plugs work well for lean running. but are more likely to foul if running rich.

'16 TT250 · 06-07-2016, 11:27 PM

I replaced the stock plugs in my '98 Honda SuperHawk with NGK iridiums. I had very low expectations but the improvement was very noticeable. I can't say it made more power, it was already a wheel standing kick in the ass, but it started quicker with less need of the choke and idled smoother. The bike was stock other than Jardine exhaust and it had been precisely dyno tuned by them.

pistolclass · 06-08-2016, 11:57 PM

Kohburn, According to the NGK website they are the same heat range, unless I not understanding it correctly. being that they are both 8's they have the same heat range, right?

NGK:

NGK indicates the heat range in the middle of the plug number. For example, BCPR6ES-11 has a heat range of 6. (The number after the “-“ is the Gap.) NGK plugs are colder the higher the number, hotter the lower the number.

Starting with part # BKR6E-11 (Heat Range 6), a colder plug would # BKR7E-11 (Heat Range 7), a hotter plug would be # BKR5E-11 (Heat Range 5).

EXCEPTION: NGK Racing Plugs: (Any NGK plug that begins with the letter “R”)

For NGK Racing Plugs, the Heat Range is located AFTER the hyphen.

Example: R5671A-10 has a Heat Range of 10. A colder plug would be # R5671A-11 (Heat Range 11), a hotter plug would be # R5671A-9 (Heat Range 9).

Some NGK Racing Plugs are also available in half heat ranges. These are displayed as a 2 or 3 digit number after the hyphen. For example, R6120-85 has a 8.5 Heat Range and R6120-105 has a 10.5 Heat Range.

'16 TT250 · 06-09-2016, 02:41 AM

As far as I know the P means projected tip, the gap is further from the body of the plug. While the projection can change heat reaction of the plug I assume they did the math so that an 8 is an 8 in either style. With no other changes projecting the tip would make a plug hotter but I'm pretty sure they change the depth to balance that back to an equivalent 8 heat.

kohburn · 06-09-2016, 08:34 AM

yep - forgot what I was looking at yesterday that made me think it was colder. no matter.

makes for intellectual discussion

a projected tip is probably beneficial on lower rpm and lower compression engines.

Johnp · 06-10-2016, 01:21 AM

All I can say is, it's been running fine in my bike for about 90 miles so far...

hertz9753 · 06-10-2016, 03:09 AM

Quote:

Originally Posted by Johnp

All I can say is, it's been running fine in my bike for about 90 miles so far...

You bought the same plug that most of did and it works fine. I always thought the R was resistor plug though.

SeerAtlas · 06-10-2016, 07:21 AM

New rider:, looks like you have some low and midrange work to do on your carb.
assuming before you pulled the plug, you had it near full throttle, the tan looks ok, but somewhere you are richer than hell. shoudn't be that much black soot- way rich, or you forgot to turn the choke off a bit lol.

06-07-2016, 09:26 PM	#16
Azhule Join Date: Dec 2015 Location: CO Posts: 1,525	They both should work just the same http://www.sparkplug-crossreference..../DENSO_PN/5730 __________________ "Think as you like... but this self proclaimed Professor is always right" - Buckshot "You never know what someone is hiding beneath their smile..." - NinjaTom - R.I.P.
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06-09-2016, 08:34 AM	#21
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	yep - forgot what I was looking at yesterday that made me think it was colder. no matter. makes for intellectual discussion a projected tip is probably beneficial on lower rpm and lower compression engines. __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250
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06-10-2016, 01:21 AM	#22
Johnp Join Date: Apr 2016 Location: Dallas, TX Posts: 65	All I can say is, it's been running fine in my bike for about 90 miles so far... __________________ John P. 2016 Hawk 250 - Black All my mods are documented on my Blog! My Blog \| Google+ \| Twitter \| Facebook
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06-10-2016, 07:21 AM	#24
SeerAtlas Join Date: Apr 2009 Posts: 770	New rider:, looks like you have some low and midrange work to do on your carb. assuming before you pulled the plug, you had it near full throttle, the tan looks ok, but somewhere you are richer than hell. shoudn't be that much black soot- way rich, or you forgot to turn the choke off a bit lol. __________________ Seer's First LAW-"FLY THE PLANE!", fail that, and nothing else matters. 12th Law- Consider what marvels you might do if only you had tomorrow to live over again. Third Law-When someone tells you some thing "Can't Be Done", what they're really saying is They can't do it!!14th Law-Just because something "IS", doesn't necessarily mean it SHOULD be.. Eighth Law-The only true personal security is anonymity.Ninth Law-Humans tend to learn very little when speaking.10th Law-Some lives ARE worth taking
	1

06-07-2016, 11:27 PM	#18
'16 TT250 Join Date: May 2016 Location: Hacienda Heights, Ca Posts: 281	I replaced the stock plugs in my '98 Honda SuperHawk with NGK iridiums. I had very low expectations but the improvement was very noticeable. I can't say it made more power, it was already a wheel standing kick in the ass, but it started quicker with less need of the choke and idled smoother. The bike was stock other than Jardine exhaust and it had been precisely dyno tuned by them.
	0

06-08-2016, 11:57 PM	#19
pistolclass Join Date: Oct 2015 Location: connecticut Posts: 980	Kohburn, According to the NGK website they are the same heat range, unless I not understanding it correctly. being that they are both 8's they have the same heat range, right? NGK: NGK indicates the heat range in the middle of the plug number. For example, BCPR6ES-11 has a heat range of 6. (The number after the “-“ is the Gap.) NGK plugs are colder the higher the number, hotter the lower the number. Starting with part # BKR6E-11 (Heat Range 6), a colder plug would # BKR7E-11 (Heat Range 7), a hotter plug would be # BKR5E-11 (Heat Range 5). EXCEPTION: NGK Racing Plugs: (Any NGK plug that begins with the letter “R”) For NGK Racing Plugs, the Heat Range is located AFTER the hyphen. Example: R5671A-10 has a Heat Range of 10. A colder plug would be # R5671A-11 (Heat Range 11), a hotter plug would be # R5671A-9 (Heat Range 9). Some NGK Racing Plugs are also available in half heat ranges. These are displayed as a 2 or 3 digit number after the hyphen. For example, R6120-85 has a 8.5 Heat Range and R6120-105 has a 10.5 Heat Range.
	0

06-09-2016, 02:41 AM	#20
'16 TT250 Join Date: May 2016 Location: Hacienda Heights, Ca Posts: 281	As far as I know the P means projected tip, the gap is further from the body of the plug. While the projection can change heat reaction of the plug I assume they did the math so that an 8 is an 8 in either style. With no other changes projecting the tip would make a plug hotter but I'm pretty sure they change the depth to balance that back to an equivalent 8 heat.
	0