Spark Plugs

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Spark Plugs

flynrider Offline

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#17

06-12-2015, 09:56 AM

(06-12-2015, 07:02 AM)Randy B_imp Wrote: The air cooled engine has something to do with it.

I suspect that the absurdly long nose is for better heat transfer from the cylinder head. Honda also put extra oil passages around the plug heads to improve cooling in that area.

Of course, my air cooled CB750 uses $5 standard sized plugs and no special oil passages for cooling, but combustion chamber temperature control was not that critical with the emission standards of 20 years ago.

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Messages In This Thread

Spark Plugs - by the Ferret - 06-12-2015, 03:51 AM

RE: Spark Plugs - by SanPete_imp - 06-12-2015, 04:01 AM

RE: Spark Plugs - by redbirds_imp - 06-12-2015, 04:03 AM

RE: Spark Plugs - by Novice_imp - 06-12-2015, 04:08 AM

RE: Spark Plugs - by redbirds_imp - 06-12-2015, 04:15 AM

RE: Spark Plugs - by the Ferret - 06-12-2015, 04:16 AM

RE: Spark Plugs - by Novice_imp - 06-12-2015, 04:19 AM

RE: Spark Plugs - by furious_blue_imp - 06-12-2015, 04:39 AM

RE: Spark Plugs - by ish_imp - 06-12-2015, 04:47 AM

RE: Spark Plugs - by the Ferret - 06-12-2015, 04:48 AM

RE: Spark Plugs - by Randy B - 06-12-2015, 04:57 AM

RE: Spark Plugs - by the Ferret - 06-12-2015, 05:03 AM

Spark Plugs - by Cormanus - 06-12-2015, 05:20 AM

RE: Spark Plugs - by the Ferret - 06-12-2015, 06:49 AM

RE: Spark Plugs - by Redbird_imp - 06-12-2015, 06:55 AM

RE: Spark Plugs - by Randy B - 06-12-2015, 07:02 AM

RE: Spark Plugs - by Flynrider_imp - 06-12-2015, 09:56 AM

RE: Spark Plugs - by sourdough44_imp - 06-12-2015, 12:54 PM

RE: Spark Plugs - by Randy B - 06-12-2015, 01:00 PM

Spark Plugs - by Cormanus - 06-12-2015, 06:47 PM

RE: Spark Plugs - by treytexag_imp - 06-13-2015, 12:15 AM

RE: Spark Plugs - by Ole_imp - 06-13-2015, 12:38 AM

RE: Spark Plugs - by Xyzzy_imp - 06-13-2015, 01:28 AM

RE: Spark Plugs - by the Ferret - 06-13-2015, 01:37 AM

RE: Spark Plugs - by CIP57_imp - 06-13-2015, 02:50 AM

RE: Spark Plugs - by MMC_imp - 05-21-2016, 05:08 AM

RE: Spark Plugs - by kennyw - 05-21-2016, 05:50 AM

RE: Spark Plugs - by Randy B - 05-21-2016, 05:53 AM

RE: Spark Plugs - by Toro5xi_imp - 05-21-2016, 06:17 AM

RE: Spark Plugs - by the Ferret - 05-21-2016, 06:19 AM

RE: Spark Plugs - by MMC_imp - 05-21-2016, 07:11 AM

RE: Spark Plugs - by kennyw - 05-21-2016, 07:39 AM

RE: Spark Plugs - by MMC_imp - 05-21-2016, 07:49 AM

RE: Spark Plugs - by Toro5xi_imp - 05-21-2016, 11:57 AM

RE: Spark Plugs - by ryanschillinger_imp - 05-23-2016, 02:17 AM

RE: Spark Plugs - by the Ferret - 05-23-2016, 02:38 AM

RE: Spark Plugs - by ryanschillinger_imp - 05-24-2016, 02:40 AM

RE: Spark Plugs - by Shinchan_imp - 07-11-2016, 02:40 AM

RE: Spark Plugs - by the Ferret - 07-11-2016, 04:38 AM

RE: Spark Plugs - by Shinchan_imp - 07-11-2016, 05:23 AM

RE: Spark Plugs - by kennyw - 07-11-2016, 04:31 PM

RE: Spark Plugs - by the Ferret - 07-11-2016, 08:55 PM

RE: Spark Plugs - by Lord Popgun - 07-11-2016, 09:42 PM

RE: Spark Plugs - by the Ferret - 07-11-2016, 09:47 PM

RE: Spark Plugs - by Redbird_imp - 07-11-2016, 11:38 PM

RE: Spark Plugs - by Shinchan_imp - 07-12-2016, 12:18 AM

RE: Spark Plugs - by the Ferret - 07-13-2016, 07:17 AM

RE: Spark Plugs - by venturer434_imp - 07-13-2016, 07:22 AM

RE: Spark Plugs - by aschem_imp - 07-13-2016, 08:22 AM

RE: Spark Plugs - by Lord Popgun - 07-13-2016, 08:59 AM

RE: Spark Plugs - by venturer434_imp - 07-13-2016, 09:30 AM

RE: Spark Plugs - by Shinchan_imp - 07-13-2016, 09:34 AM

RE: Spark Plugs - by the Ferret - 07-13-2016, 09:43 AM

RE: Spark Plugs - by Lord Popgun - 07-13-2016, 10:16 PM

RE: Spark Plugs - by the Ferret - 07-13-2016, 10:35 PM

RE: Spark Plugs - by kmoney_imp - 07-14-2016, 01:12 AM

RE: Spark Plugs - by ChipBeck_imp - 07-14-2016, 01:59 AM

RE: Spark Plugs - by Rolls_imp - 07-14-2016, 11:00 AM

RE: Spark Plugs - by 4 Paws_imp - 07-14-2016, 11:16 AM

RE: Spark Plugs - by the Ferret - 07-14-2016, 11:42 AM

Spark Plugs - by Elipten_imp - 07-14-2016, 12:32 PM

RE: Spark Plugs - by the Ferret - 07-15-2016, 07:11 AM

RE: Spark Plugs - by Guth_imp - 07-15-2016, 12:12 PM

RE: Spark Plugs - by the Ferret - 07-15-2016, 12:37 PM

Spark Plugs - by Elipten_imp - 07-15-2016, 12:47 PM

RE: Spark Plugs - by the Ferret - 07-20-2016, 06:53 AM

RE: Spark Plugs - by Shinchan_imp - 07-20-2016, 06:55 AM

RE: Spark Plugs - by the Ferret - 07-20-2016, 07:04 AM

RE: Spark Plugs - by Carguy1959_imp - 07-20-2016, 12:10 PM

RE: Spark Plugs - by PowerDubs_imp - 07-21-2016, 10:56 PM

RE: Spark Plugs - by the Ferret - 07-22-2016, 12:56 AM

RE: Spark Plugs - by Lord Popgun - 07-22-2016, 01:14 AM

RE: Spark Plugs - by kennyw - 07-22-2016, 07:09 AM

RE: Spark Plugs - by Redbird_imp - 07-22-2016, 12:25 PM

RE: Spark Plugs - by the Ferret - 07-22-2016, 12:28 PM

RE: Spark Plugs - by Redbird_imp - 07-22-2016, 12:42 PM

RE: Spark Plugs - by kennyw - 07-22-2016, 02:45 PM

RE: Spark Plugs - by minto_imp - 03-26-2018, 11:25 PM

RE: Spark Plugs - by max - 03-27-2018, 10:06 AM

RE: Spark Plugs - by peterbaron - 03-27-2018, 11:20 AM

RE: Spark Plugs - by SportsterDoc_imp - 03-27-2018, 11:32 AM

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