My RK has 5000 mi on it now; I know the spark plugs have never been changed. Can I ask advise as to when to change and type of plug to use?

• stage 1
• fuel pac comming
• bagger duals comming
• stock exhaust now
• v and h oval slip ons now

 

If they look good there's no reason not to get 30,000 miles out of them. I also have not seen any cross matched plugs to the Harley plugs. Some one else may have but not me.

 

I just replaced mine at 10k (the HD Gold Plugs, $3.50 each). Probably did not need it, but the rear plug was rusted (outside) and looked like crap. I went ahead and put the Screaming Eagles wires on, they look good. I did save the old ones incase I have a problem sometime down the road.

 

Some may sat it's a waste of money (it's my money) and so be it but I change my plugs every spring when the bike is fully serviced. Have been running stock plugs with no issues.

 

I just changed mine today when I did the 5K service.
They did not look bad at all.

 

They are cheap enough and simple to do that you really could do an annual check and replace when you feel like it.

Under 10 bucks and 5 minutes to do.

 

****,my dealer charged me $7.95 ea. just for the std. 6R12's!
Probly would not of bought them but I had a gift card from Christmas.

 

Champion RA8HC is identical to the OEM HD 6R12,and only costs $1.50 unless you buy them from J7P. I think they get $6 for them. You can run them for 5, 10, 20000 miles works great and lasts a long time.

Bwana

 

Here is a decent video about plugs.

http://www.youtube.com/watch?v=Y20c4sbLjpo

 

Been using 6R12G's and changin every 20K and no problems. Only problem was once when went with the Screamin eagle ones and at 3K miles had one fail. Went back the 6R12Golds