whirring noise

stretch8668 · 05-11-2014, 12:51 PM

I was riding bike today and it suddenly made a whirring noise and just ran funny for lil bit any ideas. I'm also gonna check valves tomorrow as I've noticed a bit of noise from them is .008 the correct clearance for them. The bike starts and revs up fine in neutral

Krasi_BG · 05-12-2014, 01:40 AM

Where from is that noise?

stretch8668 · 05-12-2014, 08:09 AM

Sitting on the bike sounded like left side

Krasi_BG · 05-12-2014, 10:28 AM

Could be the cam chain.

First, though, I'd take off the LH cover to see the magneto assembly and if it's OK, then I'd check the cam chain tensioner.

stretch8668 · 05-12-2014, 11:46 AM

Its a push rod motor and checked valves they were both where I set em at .008 but can still here them I saw at hooper imports there engine has valve clearance at .005 for intake and .006 for exhaust that's for the 163fml-2 (btw what's the difference between the 163fml and 163fml-2)

stretch8668 · 05-12-2014, 11:51 AM

I almost think the noise I heard was starter engaging cept I didn't push the button and this happened once before

Krasi_BG · 05-13-2014, 02:27 AM

I've never heard any valves making a whirring noise. Ticking yes, but that's it.

humanbeing · 05-13-2014, 06:21 AM

Quote:

Originally Posted by stretch8668

Its a push rod motor and checked valves they were both where I set em at .008 but can still here them I saw at hooper imports there engine has valve clearance at .005 for intake and .006 for exhaust that's for the 163fml-2 (btw what's the difference between the 163fml and 163fml-2)

It's .08mm or .003" .
http://www.mychinamoto.com/forums/sh...ull=1#post5529

stretch8668 · 05-13-2014, 08:49 AM

The whirring noise came from stator side of motor valves are just noisey

stretch8668 · 05-13-2014, 11:34 PM

Looks like I'm gonna have to take valve cover off again. I'm gonna rig up a dummy light to starter and mount it to handle bars so if it does it and light goes on I at least know what it is if it doesn't go on ill be back and see if anyone else has any ideas.

05-11-2014, 12:51 PM	#1
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	whirring noise I was riding bike today and it suddenly made a whirring noise and just ran funny for lil bit any ideas. I'm also gonna check valves tomorrow as I've noticed a bit of noise from them is .008 the correct clearance for them. The bike starts and revs up fine in neutral
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05-12-2014, 01:40 AM	#2
Krasi_BG Join Date: Nov 2011 Location: Sofia, Bulgaria Posts: 436	Where from is that noise?
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05-12-2014, 08:09 AM	#3
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	Sitting on the bike sounded like left side
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05-12-2014, 10:28 AM	#4
Krasi_BG Join Date: Nov 2011 Location: Sofia, Bulgaria Posts: 436	Could be the cam chain. First, though, I'd take off the LH cover to see the magneto assembly and if it's OK, then I'd check the cam chain tensioner.
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05-12-2014, 11:46 AM	#5
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	Its a push rod motor and checked valves they were both where I set em at .008 but can still here them I saw at hooper imports there engine has valve clearance at .005 for intake and .006 for exhaust that's for the 163fml-2 (btw what's the difference between the 163fml and 163fml-2)
	0

05-12-2014, 11:51 AM	#6
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	I almost think the noise I heard was starter engaging cept I didn't push the button and this happened once before
	0

05-13-2014, 02:27 AM	#7
Krasi_BG Join Date: Nov 2011 Location: Sofia, Bulgaria Posts: 436	I've never heard any valves making a whirring noise. Ticking yes, but that's it.
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05-13-2014, 08:49 AM	#9
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	The whirring noise came from stator side of motor valves are just noisey
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05-13-2014, 11:34 PM	#10
stretch8668 Join Date: Mar 2014 Location: keene nh Posts: 206	Looks like I'm gonna have to take valve cover off again. I'm gonna rig up a dummy light to starter and mount it to handle bars so if it does it and light goes on I at least know what it is if it doesn't go on ill be back and see if anyone else has any ideas.
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