bikerfish1100
New member
Bosch 4417s on my R11S. typically change around 35,000 miles. Never noticed an improvement from the changeover. i suspect that they could go 50,000 miles with no concerns. unleaded fuel is pretty easy on plugs.
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Spark Plug Life
- Thread starter DARKCLOUD
- Start date
pauls1150
MOA #24991, south of Los Angeles
"Brisk"? Never heard of 'em, sounds like recycled snake oil... What the hell is a "glide" spark???
I have changed my "lower" wire set, along with that coil (below the tank\behind the steering head). My lower plugs had been getting darker than before, along with an intermittent stumble at idle, and I don't have a way of checking their operation under load, in a combustion chamber, at all RPM, so I just shotgunned the system and all is well. Others in this forum have done the same ("Search" is your friend...).
I used to use Autolite Platinum plugs, and they ran great and lived a long time;
I now use NGK: BKR7EKC-N (part # 2095) in the center, and DCPR6E (part # 3481) in the outer/lower. They also live a long time, but I hear that NGK is now selling a longer-lasting (and more expensive; platinum tip?) replacement for those. The NGKs I have now are cheaply and easily available at the local Kragen\O'Reilly auto parts.
I have changed my "lower" wire set, along with that coil (below the tank\behind the steering head). My lower plugs had been getting darker than before, along with an intermittent stumble at idle, and I don't have a way of checking their operation under load, in a combustion chamber, at all RPM, so I just shotgunned the system and all is well. Others in this forum have done the same ("Search" is your friend...).
I used to use Autolite Platinum plugs, and they ran great and lived a long time;
I now use NGK: BKR7EKC-N (part # 2095) in the center, and DCPR6E (part # 3481) in the outer/lower. They also live a long time, but I hear that NGK is now selling a longer-lasting (and more expensive; platinum tip?) replacement for those. The NGKs I have now are cheaply and easily available at the local Kragen\O'Reilly auto parts.
another vote for 4417. Yes, they are 4 electrode. I tried autolight but my light surging came back in about 1000 miles. OEplug the surge returns in about 2K. These have been in about 15 K now and still surge less than OE at 2K.
I change side to side at each valve adjust to equalize wear. I will probably replace at the next change, more to get a new gasket than for plug wear. They do make a difference.
Rod
I change side to side at each valve adjust to equalize wear. I will probably replace at the next change, more to get a new gasket than for plug wear. They do make a difference.
Rod
happy wanderer
Day Dreaming ...
Any idea what's different about the R11S motor to a R1100RT? Amazon's fitment app says the Bosch 4417 will not fit my bike.
I tried the autolites, but didn't notice any surge reduction.
right now i run 93 octane and Bosch 4418s in my 99 R1100rs and she seems to like the Bosch better...
I think the 4418s might be too hot... I didn't see any color when I pulled them, but then again, I didn't put a whole lot of miles on them either..
this spring I will try different combinations of octane 89/93 and the 4417/4418 and see what works best for me.
they're 5.99 ea at the auto store
