spark plug - heads up - Honda Motorcycles - FireBlades.org
Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

User Tag List

 
LinkBack Thread Tools
post #1 of 8 Old 08-17-2003, 5:37 PM Thread Starter
 
Join Date: 05-23-2002
Location: Montreal, Canada
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 18
 
Re: spark plug - heads up

When installing or removing spark plugs on aluminum heads, you might want to check the following:

-make sure the head is stone cold
-careful of cross-threading
-don't overtighten
-careful with anti-seize

If the head is warmish and worse if hot, the threads become very weak. It's very easy to cross thread ie the threads offer little resistance. It's also very easy to overstress the threads by tightening the plug too much. The threads can fail and the plug may blow out on the compression stroke. Evidence of this is alum shavings on the plug thread. Technically, that's a user fault.

If you use anti-seize, use very sparingly. Tighten the plug a little less as the anti-seize reduces friction. It's easy to overtighten the plug and have it sit lower in the combustion chamber.

So. . . heads cold, no cross thread, low tightening, careful with anti-seize.

Hope this helps

Seeker
http://pages.infinit.net/mcrides

Seeker
<a href="http://pages.infinit.net/mcrides" target="_blank">http://pages.infinit.net/mcrides</a>
Seeker is offline  
Sponsored Links
Advertisement
 
post #2 of 8 Old 08-17-2003, 6:14 PM
 
Join Date: 05-24-2003
Posts: 525
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: spark plug - heads up

Thanks for the tips
KIDRR is offline  
post #3 of 8 Old 08-18-2003, 2:09 AM
 
Join Date: 03-29-2002
Posts: 576
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: spark plug - heads up

I think you should add in 'don't undertighten' as well. I'm pretty sure that's what I did wrong, in addition to not using anti-seize.
Joel is offline  
Sponsored Links
Advertisement
 
post #4 of 8 Old 08-18-2003, 12:02 PM Thread Starter
 
Join Date: 05-23-2002
Location: Montreal, Canada
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 18
 
Re: spark plug - heads up

Quote:
Joel : I think you should add in 'don't undertighten' as well. *I'm pretty sure that's what I did wrong, in addition to not using anti-seize.
It's hard to undertighten, though I guess it's possible. The manual calls for 9ft/lbs torque on the spark plug. If someone is applying 20ft/lbs, they are applying way over.

Seeker

Seeker
<a href="http://pages.infinit.net/mcrides" target="_blank">http://pages.infinit.net/mcrides</a>
Seeker is offline  
post #5 of 8 Old 08-18-2003, 12:09 PM
 
Join Date: 05-12-2003
Posts: 929
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: spark plug - heads up

Quote:
Seeker : -make sure the head is stone cold
Stones arent very cold in my part of the country.
Kookie is offline  
post #6 of 8 Old 08-18-2003, 12:22 PM Thread Starter
 
Join Date: 05-23-2002
Location: Montreal, Canada
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 18
 
Re: spark plug - heads up

Quote:
googolplexu : Quote (Seeker @ Aug. 17 2003, 4:37pm)-make sure the head is stone cold
Stones arent very cold in my part of the country.
That's a good point. If you're bike has been sitting out in the sun on a 100F day, your heads are not cold. Find some shade and leave it there for a while. If your heads are a little warmer you might be a little more careful.

Tip: on a cold head . . .9ft/lbs. On a hot head . . . less.

Seeker

Seeker
<a href="http://pages.infinit.net/mcrides" target="_blank">http://pages.infinit.net/mcrides</a>
Seeker is offline  
post #7 of 8 Old 08-18-2003, 1:46 PM
 
ND4SPD's Avatar
 
Join Date: 07-07-2002
Location: US
Age: 16
Posts: 16,568
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 50
                     
Re: spark plug - heads up

I hope this isn't a 'speaking from experience' thread
ND4SPD is offline  
post #8 of 8 Old 08-18-2003, 2:48 PM Thread Starter
 
Join Date: 05-23-2002
Location: Montreal, Canada
Posts: 62
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 18
 
Re: spark plug - heads up

Quote:
ND4SPDSHO : I hope this isn't a 'speaking from experience' thread
Just another caution. We tend to think that most damage occurs when we install plugs. We put the plug in and find that it doesn't go in well and figure we cross-threaded the plug.

In fact, most thread damage occurs when sparkplugs are removed from a hot head. This is especially true if the plug has been overtorqued ie 20ft/lbs or more when installed.

When we go to re-install the plug, the damage is already there.

Seeker
<a href="http://pages.infinit.net/mcrides" target="_blank">http://pages.infinit.net/mcrides</a>
Seeker is offline  
Reply

  Lower Navigation
Go Back   Honda Motorcycles - FireBlades.org > Honda Motorcycle Models > Honda FireBlade

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda Motorcycles - FireBlades.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
A valid e-mail address is REQUIRED. You will not have access to any site features until you activate your account using the activation e-mail that is sent to this address.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
spark plugs twipper Honda FireBlade 18 02-03-2007 8:40 AM
Heads up for the ladies and you guys with SO's ND4SPD Off-Topic 10 11-26-2003 4:47 PM
954 Spark Plugs Tank69 Honda FireBlade 11 10-27-2003 1:11 PM
Changing spark plugs on the 929 KIDRR Honda FireBlade 20 09-06-2003 2:40 AM
929 doesnt have spark?..wont start apok408 Honda FireBlade 9 08-24-2003 12:30 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome