[orangemug]

this may sound kinda dumb but how often should i change the plugs in my bike. i got 1570-ish miles on it now and didnt know how long i can go without a change unlike cars how u can get 100k miles out of a set easily. also is there a certain brand of plugs that reign over the others?


thanks

 

[T-man]

My service manual for a 1500 says clean and gap around every 3500-4000 miles. I pulled one plug on each cylinder at 20,000 miles for the first time and did not see wear of the electrode or any other reason to replace them. As long as the gap is right and there are no other problems like cracked insulators AND there is NO misfire (most likely at high engine load), then why change them? Unless you are planning a trip of several thousand miles, and even so, throw a couple in your bag and go. That's my 2 cents.

 

[2WheelFun]

I use NGK brand in my 1500. They work well and last...and last...and last...and last.

 

[Calamarichris]

I've got 44,000 miles on the original plugs in my '00 W650, that are finally beginning to show their age. As long as you haven't over-richened the mix with a stage-1 jet kit, you can easily get that many miles out of a set of plugs.
Got the new plugs standing by and waiting for installation, just need to get all the other fires put out before I can squeeze-in some garage time.
-CCinC

 

[SteveA]

I always recommend examining the spark plugs at least once a year, since the plugs are the only window into your cylinder. You can monitor carbon build-up (if any), adjust fpr rich/lean conditions, check the plugs for any cracks in the insulator material, check for burning oil deposits and give a quick cleaning if needed. This applies if the plugs are easily reached. I have to take them out anyway to fog the cylinders for winter storage. I was getting knocking on the Meanie, so the plug condition told me it was running too lean, which tells me it has an ignition map that is not too conducive to gentle cruising.
Regards

 

[rlovrin1]

I use Denso Iridium plugs in my bike. No need to replace for a while . On my old bike, I'd change my plugs every 3,00-5,000 miles which is once a riding season for me.

 

[Knightrider]

Spark Plugs

Theyre not that expensive. Change them every season here. Ive seen BRAND NEW plugs installed and never fired, sit in an engine and after a long winter found that they just wont fire. Go Figure. Buy new ones. Clean the old ones and put them in your tool bag. YA NEVA KNOW.