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Technical Mods, fixes, maintenance, etc.

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  #1  
Old 08-21-2014, 07:56 PM
Darren Giddings Darren Giddings is offline
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Post Spark plug mod

I did some work on my spark plug today . Just for the experiment .

I used a Dremel to reshape the earth electrode of the NGK plug . I took

the edges off the end ( now it is curved ) of the electrode and thinned the

piece down .

Suprisingly good results . I have only had a chance to test it once so far .

This has changed my bike as much as the snorkel mod or 14t sprocket .

No reluctant starting ( on the dime now ) . But what is best is the increased

performance from 8500 rpm to red line . Big difference . My bike SOUNDS

different now . Better . These pics aren't very good , but from directly above

the plug , the iridium tip is not visible , but move your head a fraction either

way and you see it . But the end is narrower and rounded .

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Old 08-21-2014, 07:57 PM
Darren Giddings Darren Giddings is offline
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Anouther pic .
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Old 08-21-2014, 07:59 PM
Darren Giddings Darren Giddings is offline
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And anouther . Ps- the plug is altered in all three pics ... I didn't take a pic before .
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Old 08-21-2014, 11:03 PM
GoFaster GoFaster is offline
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Hmmm ... Interesting idea but keep an eye on it. I've found that over time, iridium spark plugs erode the ground electrode (which is still steel). You've basically pre-eroded it some by doing this. (The normal erosion now has a smaller surface area to be spread over.) It will likely shorten the useful life of the spark plug.

Not that it's a big deal ... just something to watch for.
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Old 08-21-2014, 11:54 PM
Darren Giddings Darren Giddings is offline
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Yes , I will be keeping an eye on it Gofaster . I didn't mention that I didn't

change the earth electrode thickness at any point. I just made 90%

( perpendicular ? ) slices to the width . Almost like pointing the earth , instead

of the square end . The idea was ( is ) a bit of an experiment to more openly

expose the spark to the mixture . I WILL keep I an eye on the plug . Thanks ;

The photos really are poor ... When I have the plug out next I will try

to get a better pic .

Also I should mention that I didn't alter the gap at all , and I started the narrowing almost at the thread end ,

slightly making it more narrow as I moved toward the end ( center ? ) . The very end is round like the

iridium tip just below it , and only slightly ( 1mm ? ) larger .
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Last edited by Darren Giddings; 08-22-2014 at 12:06 AM. Reason: Spelling
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Old 08-22-2014, 07:13 AM
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DoubleJ DoubleJ is offline
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Imagination plays strange things. Maybe on a 2T but not on a 4T. If this was fact why hasn't the plug manufacturers done it? Shorter life.... more sales! Maybe because if electrode fails and wipes out piston there would be al kinds of repercussions to them. Just saying and musing.
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Old 08-22-2014, 09:41 AM
Darren Giddings Darren Giddings is offline
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Good questions . Here is the thing . I have NEVER had a spark plug fail from

electrode failure DoubleJ . I have no idea what a 2T is

nor a 4T . Please explain .

As for imagination ; I have two spare plugs for the 125 . Both in great shape

with few kilo's . If you would like to try it out , I will send you one of these

plugs and you can decide for yourself . Free - shipping too .

I am very skeptical about you theory of destroyed pistons from electrode

failure . Tip failure , a very slim maybe .

Just saying and musing , based on 35 years if tooling with gas engines .

Send me a PM if you want to try a plug . I will send one out .

PS - I recall you telling me quite adamantly , that my battery would " surely

die " when I did my seat heater mod . Still using the same , original ( 2008 )

battery , and I had the heater on for a few minutes yesterday .

Just saying ,

The other thing is , as you likely know , it is advantages to present the spark

to the mixture in as open a way as possible . The theory I am using is correct .

The results have proven this to me .
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