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"Whirring" sounds..?????

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Old Mar 18, 2018 | 09:12 AM
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Default "Whirring" sounds..?????
OK Evo folks...here's today's pop quiz.
The motor is a 1999 with about 100,000 mi. on it. NO changes or mods to the motor. I'm picking up a noise that I can only describe as "whirring" that I hear while the bike is in neutral, clutch is disengaged, sitting still, idling. The sound increases in speed as I rev the motor. Seems to be more right-side than anywhere. The bike runs great. Just got back from a little 400mi. hop with no problems, but the "whirring noise" continues.
Thanks.
 
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Old Mar 18, 2018 | 09:16 AM
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What's the history on the cam bearing?
 
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Old Mar 18, 2018 | 09:45 AM
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Original cam bearing. No changes in there from factory new.
fwiw: This is a '99 crate motor, bought "new in the box" and put in my 1985 FXRS in 2006.
 
Last edited by guido4198; Mar 18, 2018 at 09:46 AM.
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Old Mar 18, 2018 | 10:09 AM
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Inner cam bearing is a 50K service item on motors that came with the later style, like that 99 crate motor.
 
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Old Mar 18, 2018 | 10:11 AM
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Inner cam bearing is a 50K service item, along with lifters, on motors that came with the later style bearing, like our 99 crate motors.
 
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Old Mar 18, 2018 | 10:20 AM
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Originally Posted by Dr.Hess
Inner cam bearing is a 50K service item, along with lifters, on motors that came with the later style bearing, like our 99 crate motors.
Yup I'd be popping the nosecone and having a look at the lifters and cam.
 
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Old Mar 18, 2018 | 10:43 AM
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Originally Posted by Dr.Hess
Inner cam bearing is a 50K service item, along with lifters, on motors that came with the later style bearing, like our 99 crate motors.
Originally Posted by TwiZted Biker
Yup I'd be popping the nosecone and having a look at the lifters and cam.
Me too.
 
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Old Mar 18, 2018 | 11:10 AM
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Originally Posted by texashillcountry
Me too.
Me Three....

Having a cam bearing grenade is bad do-do. Swap out the INA for a Torrington. And while you're in there swap out the lifters too. MAW upgrade to a better cam at this time.
 
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Old Mar 18, 2018 | 11:19 AM
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Been there What the guys said

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Old Mar 18, 2018 | 11:57 AM
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Me four. Get some EZ-swap pushrods and a cheap set of bolt cutters to make the work so you don't have to pull the rocker boxes.
 
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