| Author | Message | ||
     2stangbk |
My 04' XB12S has about 6600 miles on it, 600 of that is mine since I bought it 4 weeks ago. Lovin it so far and have learned alot from this board already. Curiousity was killing me on a slight miss the bike has between 2-3000rpm. I pulled the plugs and the back one looks great with a nice tan burn to it and very little soot(sp?).The front plug however is gunked up a bit, looks to be a little oil buildup, no matter its a bit crusty. Now, as I'm checking my service manual it list the plug number as a 10R12A, but what was in the motor was 6R12's. Is the 6R12 a bit cooler of a plug? And could that have lead to the front plug fouling out a bit faster that the rear? For reference I'm ordering my NGK's tomorrow to replace the factory ones so I'm not to wrapped up about it, just more curious as to why that plug is in there instead of the 10R12A. Thanks for your time, BK | ||
| Andymnelson |
I use an 8 temp plug. As I understand it, the temp rating is the plugs ability to transfer heat energy to the head- higher heat numbers=higher levels of heat transfer and vice versa. I certainly don't need more heat there, so I went with a "cooler" plug. No real perceived difference, but to answer your questions to the best f my ability: yes it is a cooler plug, and it is doubtful that that would cause fouling. Please correct me if I'm wrong, just trying to pass on the info that's in my limited brain! | ||
| Mathen001 |
On that note..... With the xb my fat fingers can't get any where near the plugs! do I need to drop the engine? | ||
| Glitch |
All you have to do with the front plug is take off the scoop, you can even use an open end wrench. The rear on is a little bit tricky even for long skinny fingers. You'll need a short extension and a swivel. For me it's getting the wires off that drive me nuts sometimes. | ||
| Typeone |
Is the 6R12 a bit cooler of a plug? the 6R12 is a hotter plug than the 10R12, its the old tuber/sportster plug but Buell posted a service Bulletin around 2000 with instruction to use 10R12 moving forward. i would grab some new plugs (10R12 or a 9 series NGK), gap them to 0.035", install and always let the bike warm up properly on its own. no revving while cold. check the front plug again after a ride or two and see how it looks. +1 to Glitch's comment, the plugs become easy, the damn wires CAN drive you nuts. i use a good set of plug pliers to help. | ||
| Andymnelson |
Scratches head....runs out out look at bike... Looks like I opted out of a cooler plug when I replaced them- have a 10R12 in there now... I think that we all tend to misunderstand spark plug heat ranges (myself included). A great read is here: http://www.ngksparkplugs.com/techinfo/spark_plugs/ techtips.asp | ||
| 2stangbk |
Good reads from you guys as I expected and thanks for the link to the NGK page as well. I ordered the 9 series Iridiums today from my AMSOIL guy at work, they should be here Thursday sometime, then squeeze the plugs back in there, and those tricky wires as well, then back to the road where the Buell belongs! | ||
| Strmvt |
I just put in a pair of NGK Iridiums DCPR9EIX 1 temp colder then stock Haven t ridden it yet waiting on the American Sport Bike open airbox kit to arrive tomorrow I had just put in stock temp Iridiums to lol but I used ecmspy and tuned the ecm and was told to use the colder plugs (Message edited by strmvt on September 09, 2008) |
