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TOPIC: Re:MPG down after new plugs? Forum Tools Post New Topic Show latest posts Rules

#497397 professor8 (User) Junior Boarder Posts: 132 MPG down after new plugs? 11 Months, 3 Weeks ago   I recently pulled the original stock plugs on my 04 R* and put in new Iridiums. Since doing this I have noticed my mpg has dropped from 42-44 to about 38 (or less). I didn't make any other changes at the time. I thought, if anything, I would get better mileage after changing the plugs. Could new plugs cause the mpgs to drop? The outside temps went up a bit over the last couple of weeks also - could this be cause for the suddenly poor mileage? The bike is still running and sounding great... -R   Logged     As different as we are, the road we travel is the same.   The administrator has disabled public write access. #497400 Blackroadie (User) Sometimes I wish you were a pinata ! Platinum Boarder Posts: 6899 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Odd. I could tell I had more power and the cylinders burnt better...causing a little better mileage. I havent heard of anybody putting in Iridiums and losing mpg's. Dont know about the temp...I never really notice any difference with mine. Lets see what others say.   Logged     ...Scott   The administrator has disabled public write access. #497402 SKWEARpeg (User) Platinum Boarder Posts: 5305 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   I'd check and make sure all the caps are pushed down tight on the plugs. Do you remember what you gaped them at? What kind of plugs were in it before, and what did you use for replacements?   Logged       The administrator has disabled public write access. #497409 Blackroadie (User) Sometimes I wish you were a pinata ! Platinum Boarder Posts: 6899 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Iridiums are pre gapped...no touchy...delicate. He took the factorys out.   Logged     ...Scott   The administrator has disabled public write access. #497413 professor8 (User) Junior Boarder Posts: 132 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   As stated - I removed the original plugs - I think these were NGK. (The bike didn't have a lot of miles on it when I bought it.) I opened the gap a bit on the iridiums to .034 per the manual. I've since rechecked the plugs (retorqued per spec) and reseated the boots. They seemed to be on tight before though. And the bike is running really good - just burning more fuel than normal.   Logged     As different as we are, the road we travel is the same.   The administrator has disabled public write access. #497417 Greysnake (User) I'm so far behind I think I'm first. Platinum Boarder Posts: 10224 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Thats called twisting the throttle syndrome. Feels like more power and you tend to twist alittle more.   Logged     06 Midnight Silverado *nothing shines like a star*   The administrator has disabled public write access. #497423 professor8 (User) Junior Boarder Posts: 132 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Could definitely be related to this syndrome I'm on a fresh fuel refill right now after rechecking all connections/retightening/etc so I'll know better in about a week. I'm really trying to lay off the throttle though...but it's difficult - and not near as much fun! I just want to make sure I work on one thing at a time without introducing any problems - getting ready to do the AIS removal next.   Logged     As different as we are, the road we travel is the same.   The administrator has disabled public write access. #497500 Questcap (User) Platinum Boarder Posts: 4398 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Air temp definitely affects gas mileage, too.   Logged     Sig Pic deleted - larger than 450 pixels and 50 kb   The administrator has disabled public write access. #497519 SKWEARpeg (User) Platinum Boarder Posts: 5305 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   Blackroadie wrote: Iridiums are pre gapped...no touchy...delicate. He took the factorys out. Ouch! That's twice. I may have to put you on the payroll.   Logged       The administrator has disabled public write access. #497521 Blackroadie (User) Sometimes I wish you were a pinata ! Platinum Boarder Posts: 6899 Re:MPG down after new plugs? 11 Months, 3 Weeks ago   SKWEARpeg wrote: Blackroadie wrote: Iridiums are pre gapped...no touchy...delicate. He took the factorys out. Ouch! That's twice. I may have to put you on the payroll. where do I sign up!   Logged     ...Scott   The administrator has disabled public write access.

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