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#16 |
Join Date: Dec 2015
Location: CO
Posts: 1,525
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"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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#17 | |
Join Date: Dec 2015
Location: Coastal NC
Posts: 537
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Quote:
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.
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-whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250 |
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#18 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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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.
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#19 |
Join Date: Oct 2015
Location: connecticut
Posts: 980
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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. |
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#20 |
Join Date: May 2016
Location: Hacienda Heights, Ca
Posts: 281
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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.
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#21 |
Join Date: Dec 2015
Location: Coastal NC
Posts: 537
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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.
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-whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250 |
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#23 |
Join Date: May 2016
Location: Bismarck, ND
Posts: 868
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You bought the same plug that most of did and it works fine. I always thought the R was resistor plug though.
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2015 and 3/4 RPS Hawk 250. Most people would call it a 2016 but the MCO didn't. |
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#24 |
Join Date: Apr 2009
Posts: 770
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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.
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hawk 250, spark plug |
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