Just got my bike about 2 weeks ago and im slowly doing some routine matenance on it. I changed the oil on it last week and it still looked pretty dang good. but now i wanna swap out the plugs and possibly wires... its got 23k on the bike and idk when the last time they have been changed out so i would like to swap em out becuase it seems to run a little sluggish at times... my first question is what are the best plugs to run on these bikes ( 2003 cb600f4i) and also the best wires... if the best is not neccessarily needed, what do you guys reccommend?

 

NGK IMR9C9H for the plugs, and F4i's don't have plug wires. You can get the plugs at O'Rileys auto parts for about $10/plug, about the cheapest I've found

 

oh okay cool, good deal...guess you learn somethin new every day :P thanks man!! recently i was looking through the write up for how to change these on the FAQ sticky but seems that page is no longer around...anyone know of a write up for it? and also are any special tools needed?

 

ah 1 more question.... whats the gap on the plugs?

 

Hmmm I'm not sure of any write up's, but will say I've done it both ways... the way the manual states by lowering the radiator and getting them from the front, and doing it from the top by taking the airbox out, and I find it much easier doing it from the top and just taking the airbox out. Otherwise it's hard getting 2 of the coils out cuz they hit the airbox and don't bend

If you have the factory toolkit with your bike, it'll have the spark plug tool in there with it. Then you just need a 10mm to turn it with... you can use the wrench in the toolkit but I always prefer a socket and 1/4" drive ratchet instead... seems to be a little easier. Just be careful not to over tighten them, and it's always a good idea to take some compressed air and blow out the spark plug holes before taking the plugs out to keep any dirt or anything from going down in the cylinders when you take them out

 

I forget the gap.... don't have my manual handy to look. But usually platinum and iridium plugs are pre-gapped. If you do adjust them you have to use the wire type tool to adjust them, not the little disc that you sandwich between the electrode and ground strap and wiggle to open it up. I've never had to adjust the gap on any plugs I've put in, and gone through a few, lol