Question about 2001 Yamaha YZF-R1

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My RPM gauge keeps jumpin 7000 RPM down to 4000 and back to 0

My RPM gauge keeps jumpin to seven thousand RPM jumps to four thousand RPM and goes back to zero what is the cause of that?

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Spark plug wires probably aren't seated firmly or cdi unit is going bad!

Posted on Sep 29, 2009

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Help me solve


1. Four Hundred Seventy-Eight Ten Thousandths
2. One Thousand Four Hundred Thirty Five Ten Thousandths.
3. Three Thousand Two Hundred Five Ten Thousandths.
4. Four thousand Seven Hundred Eighty Four Ten Thousandths.
5. Four Hundred Ninety Seven Ten Thousandths.

OR

1. Zero point zero four seven eight.
2. Zero point one four three five
3. Zero point three two zero five
4. Zero point four seven eight four
5. Zero point zero four nine seven

Thanks and please take a moment to rate as fixya.

Jul 06, 2008 | Audio Players & Recorders

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