My '06 R1 with just under 31K miles started running like crap yesterday. It sounded like a V-twin, smelled rich, bogged under 5K RPM when hard on throttle. (It starts up without hesitation and when it's warm, it uniformly drops in RPM but at idle and accelerating from stopped sounds like a twin)
I pulled the spark plugs last night (photo at bottom). They are original stock CR9EK plugs with ~31K miles on them and they look fine. I went ahead and bought new plugs today since they're way overdue.
{Please don't flame me for being lazy on maintenance. I know plugs are supposed to be changed every 8K, and I'm overdue for valve check, yada yada.}
Maybe I was a bit premature in pulling plugs. Should I have checked for spark first? (I can easily reconnect to coils and do the "ground on motor" check). But since the plugs look fine I was thinking that it is more likely an ignition coil problem (or something worse??). But I'm not a mechanic so I figured I'd ask the R1 geniuses on this board.
I just tested the resistance:
Primary Coil Resistance spec is 1.19 - 1.61 Ohms per the Service Manual.
All of mine were at 1.8 Ohms. Is it OK to have higher resistance, just not LOWER? i.e. Do I need to replace all FOUR coils?
Secondary Coil Resistance spec is 8.5 - 11.5 K-Ohms
Mine:
#1 = 9.60
#2 = 8.35
#3 = 9.64
#4 = 9.71
I'm thinking the #2 ignition coil is providing a weak spark but I don't really know what I'm talking about. Can any of you confirm this?
In short, do these numbers indicate I need FOUR new coils or just ONE (or none)? If none, what do you think the problem is?
Thanks in advance for any help.
my stock NGK CR9EK plugs after 31k miles
I pulled the spark plugs last night (photo at bottom). They are original stock CR9EK plugs with ~31K miles on them and they look fine. I went ahead and bought new plugs today since they're way overdue.
{Please don't flame me for being lazy on maintenance. I know plugs are supposed to be changed every 8K, and I'm overdue for valve check, yada yada.}
Maybe I was a bit premature in pulling plugs. Should I have checked for spark first? (I can easily reconnect to coils and do the "ground on motor" check). But since the plugs look fine I was thinking that it is more likely an ignition coil problem (or something worse??). But I'm not a mechanic so I figured I'd ask the R1 geniuses on this board.
I just tested the resistance:
Primary Coil Resistance spec is 1.19 - 1.61 Ohms per the Service Manual.
All of mine were at 1.8 Ohms. Is it OK to have higher resistance, just not LOWER? i.e. Do I need to replace all FOUR coils?
Secondary Coil Resistance spec is 8.5 - 11.5 K-Ohms
Mine:
#1 = 9.60
#2 = 8.35
#3 = 9.64
#4 = 9.71
I'm thinking the #2 ignition coil is providing a weak spark but I don't really know what I'm talking about. Can any of you confirm this?
In short, do these numbers indicate I need FOUR new coils or just ONE (or none)? If none, what do you think the problem is?
Thanks in advance for any help.
my stock NGK CR9EK plugs after 31k miles