Spark plugs
Thread Starter
|
Intermediate
Joined: Jun 2018
Posts: 28
Likes: 10
From: Oakland,CA
Spark plugs
1992 FXRP, stock with a big sucker air cleaner. Replacing spark plugs today and on the left (Autolite AC 4265) came out. Replaced with the right (NGK BPR5ES-11). Both are listed for my model but physically and visually theres quite a difference. Any problem here or am I ok?. Thanks guys.
HDF Community Team
Joined: Jan 2020
Posts: 1,434
Likes: 800
From: Colorado
My thoughts, although the bike is supposed to run a 5 heat range plug, the 5 you have in the bike is burnt to hell, and would try to run a cooler 6 heat range plug or at least tune it with the big sucker in play, so it not running so lean or to much pre ignition to cause the plug problem in the first place.
Stellar HDF Member
Joined: Feb 2007
Posts: 2,558
Likes: 280
From: Russellville, Arkansas
Depending on how many miles and how you ride....the old plug may not be too bad.
But, those two plugs look totally different size wise. Remember, cross referencing doesnt always cross reference into your application.
But, those two plugs look totally different size wise. Remember, cross referencing doesnt always cross reference into your application.
Seasoned HDF Member
Joined: May 2008
Posts: 21,143
Likes: 12,707
From: South Carolina
There is a conflict of your referenced NGK part numbers, you say BPR, but pic shows BKR...
Last edited by Dan89FLSTC; Nov 12, 2020 at 08:37 AM.
HDF Community Team
Joined: Dec 2005
Posts: 5,404
Likes: 2,605
From: NC USA
And no offense intended but the chart in post 3 should be watermarked "Circa 1969" or something. It's all over the net but the plugs are obviously from a water cooled engine running leaded fuel and has little relevance to todays engines.
Thread
Thread Starter
Forum
Replies
Last Post
