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Spark plugs

Raz0rback

Raz0rback

Nucks Suck
Joined
Aug 2, 2008
Location
GSXR Land
Moto(s)
07 GSXR 750
On the 07 gsxr 750, can I only use NGK CR9E or DENSO U27ESR-N?

I know that NGK and DENSO have 2 other choices (if the plug is apt to get wet or overheat) but compared to plugs for cars the prices for the CR9E were a whole lot more and weren't even irdium.
 
You can use other plugs but why? I have CR9E's for $5 each
 
O and car plugs and moto plugs are quite different
 
afm199 said:
You can use other plugs but why? I have CR9E's for $5 each
Click to expand...
What he said.

You can look for other cross reference plugs, but the smarter option seems to be sticking with the stock option.

afm199 said:
O and car plugs and moto plugs are quite different
Click to expand...

Not really, the plugs used in the BF225's I used to work on (basically the same engine in the Honda Odyssey converted for outboard use) were extremey similar to your typical modern SS engine plugs, and were $16 each. The plugs in my YSR, my KM100, and my VW are the same (with exception to heat range).
 
Changing the heat range doesn't seem like a good plan, if it's doing fine now.

Changing the manufacturer may have unintended consequences. Equivalents sometimes aren't.

I generally stick with the OEM NGK/Denso/whatever plugs.
 
keep the same heat range, just change the materials. instead of cr9e's get cr9eix's, they're iridium fine wires. little more money, but last a long time.
 
usually double as long as the bike doesnt have fuel or ignition issues.
 
Raz0rback said:
On the 07 gsxr 750, can I only use NGK CR9E or DENSO U27ESR-N?

I know that NGK and DENSO have 2 other choices (if the plug is apt to get wet or overheat) but compared to plugs for cars the prices for the CR9E were a whole lot more and weren't even irdium.
Click to expand...

I to have them for $5.00, but personally I op for the CR9EK for a couple of bucks more. This is the dual electrode version and in my opinion, helps give a little more kick.
 
The NGK cr9eix could be changed every 15k miles then? Because the normal plugs are suppose to be changed at 7.5k miles.
 
Raz0rback said:
The NGK cr9eix could be changed every 15k miles then? Because the normal plugs are suppose to be changed at 7.5k miles.
Click to expand...

There are a lot of things to think of there. Race bikes I change plugs at least yearly. Street bikes I don't worry about that much. I look at the tip, the gap, and decide. I have gone way over the manufacture recommendation at times. Depends entirely on your driving style and the plug look. A commuter bike, properly carbureted is very easy on plugs. A bike ridden hard at high rpms is not.
 
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