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Discussion Starter #1
Goggled for platinum plugs and found this Factory Pro "ignition advance kit" RTR-KAW-5-05 $54.95
Scroll down a bit...
http://www.factorypro.com/Prod_Pages/prodk05.html

What's the lowdown on their claims?

"This simple, bolt-on advance kit advances the timing 5 degrees. With stock engines with stock compression ratios, there is more power everywhere. Part throttle power is better - helping corner exit speeds. Improved in-town drivability and quicker warm-up.

Absolutely REQUIRES an AIR IMPACT wrench to install - If you try using the puller without an impact you WILL strip the puller and the ruin the puller threads in the flywheel!
 

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Discussion Starter #2
The same site lists Denso Platinum plugs.
Anyone here recommend the best platinum spark plug for our EX500s?

"X24ES-ZU - Premium, Platinum, U Groove spark plug.
It is recommended to start a tuning session with new spark plugs."

"Denso (ND, Nippon Denso) is the largest OEM supplier for autos and motorcycles of electrical components in the world. Sometimes, people forget that Denso makes pretty darn good spark plugs, too! Wide heat range properties discourage plug fouling at low speed AND overheating at high speed.
We have been using Denso spark plugs in our AMA Supersport bikes since Denso was Nippon Denso and ND. We have found that some standard, <$10, off the shelf, Denso spark plugs work as well as $125 special spark plugs - on a professional roadrace level!
Codes:
X = 12mm thread with 18mm spark plug wrench required
24 = Heat range. (Hint - it is ~3x NGK #. I.E. an "8" heat range in NGK)
E = 3/4" reach
P = Projected tip type plug
R = Resister type internal construction
Z = Thin platinum center electrode w/ tapered ground (side) electrode
U = "U Groove" side electrode for better spark and finally..
9 = is "pregapped" at .9mm (You should check any "pregapped" plug before you install it..)"
 

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MrSciTrek said:
Goggled for platinum plugs and found this Factory Pro "ignition advance kit" RTR-KAW-5-05 $54.95
Scroll down a bit...
http://www.factorypro.com/Prod_Pages/prodk05.html

What's the lowdown on their claims?

"This simple, bolt-on advance kit advances the timing 5 degrees. With stock engines with stock compression ratios, there is more power everywhere. Part throttle power is better - helping corner exit speeds. Improved in-town drivability and quicker warm-up.

55 bucks for a offset Woodruff key and a 18mm bolt (to remove the flywheel.) The impact wrench and is BS as is the entire idea
FOG

Absolutely REQUIRES an AIR IMPACT wrench to install - If you try using the puller without an impact you WILL strip the puller and the ruin the puller threads in the flywheel!
 

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There is NOTHING wrong with Denso plugs. I get the same numbers from Denso as NGK and Champion plugs.

The advance kit looks like a puller and a offset wooddruff key... $54.95 sounds awfully expensive for an offset wooddruff key.
(I have been pulling rotors without an impact gun for manymanymany years without a problem because I have the right tool. The puller they supply is NOT the right tool).
 

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Discussion Starter #5
bitzz said:
There is NOTHING wrong with Denso plugs. I get the same numbers from Denso as NGK and Champion plugs.

The advance kit looks like a puller and a offset wooddruff key... $54.95 sounds awfully expensive for an offset wooddruff key.
(I have been pulling rotors without an impact gun for manymanymany years without a problem because I have the right tool. The puller they supply is NOT the right tool).
Does anyone have the model numbers handy for the various brand of platinum plugs?

Does dialing-in a little spark advance help power/mpg/whatever as they claim it does?
Would it require higher octane fuel or carb adjustments?
 

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Yes the Octane requirement would go up. Whether it would be enought to demand High test ...Idunno. As to more power I don't think anything signifacant. I know I beat plenty of guys racing all kinds of modified EXs in my racing career and I can tell you that I've only seen 1 or 2 bikes (modified EXs) at the track that made anything approaching a real power improvment that could be used to get around the race track. and one of them was a Grenade.

All the statements I hear around here and at the track, involve some sort of subjective estimate, or their personal feelings about the improvment their demon Mod. made. 99.9% of those statments are Bogus. "hell I just spent 300 or whatever it's got to be better".

Been there , done that, and it didn't work..
FOG
 

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Discussion Starter #7
FOG,
I respect the voice of hands-on & hard-knocks experience that has found regular success.
Keep it going. Maybe someday I can reciprocate. Bart
 

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Discussion Starter #8
3rd edition, 2002 Clymer manual list of plugs-

87-93 NGK DR8ES or ND X27ESR-U

1994-on CANADA NGK DR9EA ND X27ESR-U
USA & ETC. NGK D9EA ND X27ES-U

Gap 0.6 TO 0.7 mm (0.024- 0.028 in.)
 

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I've got 15,000 miles on the original plugs in mine. About 10,000 of that is very hard running. I'll usually run a set in my bikes 20,000 to 25,000 before to replace. Even then, it's not a running problem that causes me to replace them, just normal wear and tear, rounding of the electrode. I use nothing special, just the standard NGK replacement part.
 
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