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Proactive Maintenance, when do i change spark plug???

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have an 03 crf450 and was wondering should i go ahead and change or wait until specified time frame. only have about 25 hours on bike. also i called to see if any in stock and they quoted me 18 bucks!!!! is that right?

john

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i change mine once a year. the price is correct. i think i paid $13 for my last one with a discount.

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The plugs are expensive but they last FOREVER. Change it when you put a new piston in at 100 or 200 or 300 hours.

I bought 2 spare plugs in Nov 01 when I bought my 02. I still have not had to buy more.

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Every winter when I tear the engine apart it gets a piston,rings and a plug.

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