Spark plug confusion

[bruce1045]

I have a 2004 r1150 rt the stock plugs according to my Clymer is

14MM NGK BKR7EKC

12MM NGK DCPR8EKC

I think these are single prong plugs? The ones on my bike are dual prong plugs, sorry forgot the numbers.

Does this bike take single or dual prong plugs?

I am not looking for a more performance, just want to get some new plugs in, as one of the Bosch plugs have a crack on the porcalain.

Sorry if these has been covered before.

At least the topic is not about oil

[David R]

I don't know which your bike calls for but if its the right heat range and size, it will work.

 

 

David

[Tobias]

There are lots of plugs that work.

 

Here is a set:

http://www.beemerboneyard.com/12127681415s.html

 

[waynerd]

Yep, lots of plugs that will work - single ground, dual ground, skinny electrode. I even recall a portion of a recent thread that extolled the virtues of a single ground over a dual ground...more exposed spark (I think was the argument). The NGK's will be fine.

 

Want more confusion? Take a gander at the repair parts archive at the top of the Oilheads forum. You could likely change brand/part number every time you swap plugs and never use same one twice (small exaggeration).

 

I just finished my 36K service and was very pleased with the way the old plugs looked - even the bottom ones which were all gunked up the very first time I serviced the bike.

 

If you care, I've been using the Autolite equivalents (top & bottom) 'cause they're readily available for a decent price:

 

Top: Autolite 3923 (or equivalent variants - AP3923 (single platinum), APP3923 (double platinum)) - I can get 'em at Walmart

 

Bottom: Autolite 4164 (standard copper ones available at auto parts stores) **CAVEAT** these plugs require an 11/16" socket which won't fit into the recess in the head without grinding down the OD of the socket to about .840" - leaves you with a thin wall, but it works.

 

I gap 'em all to .037" (no measureable increase in the gap of the old plugs). Great results so far.

[bruce1045]

thank you all for the answers, I see the light now,

 

[RPG]

Wayne, thanks for the Autolite numbers.

 

Need to do a tuneup on my RT.

 

RPG