Breather Gear Causing Whine?
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From: la la land jerzey
ok what I see is you have an end oil cover and an end oil bushing in it as well as a end oil pinion, and many run out in the fit to the center of the pinion to bushing location - it can be corrected as we have the correct tool, and you come in from inside the engine case to the cam cover using the cases pinion bushing and center both to one another -- now buying a generic cam cover and not having it machined at the same time to one another ( engine cases ) is just causing even more issues
at the beginning of AMF they did things like this with the cover - changing - the engine oiling system and making a special bushing to retro fit a the 2 year cover so it could be continued, and not adding an A to the end showing that a change was made - they did fix that as they went along in the learning how to build motorcycles
what I did see is the breather valve end play was incorrect as the face if the cam cover has a deep rub on it from the no end play - we set these at .010 or as close to that as one can measure using an old gasket that is compressed, and using the exact same type of gasket going back on - you can take a straight edge across the engine gasket to breather shim and measure it that way
a noise could have been the breather end play or lack of hard to tell not hearing it -- what is normal and what is something different
at the beginning of AMF they did things like this with the cover - changing - the engine oiling system and making a special bushing to retro fit a the 2 year cover so it could be continued, and not adding an A to the end showing that a change was made - they did fix that as they went along in the learning how to build motorcycles
what I did see is the breather valve end play was incorrect as the face if the cam cover has a deep rub on it from the no end play - we set these at .010 or as close to that as one can measure using an old gasket that is compressed, and using the exact same type of gasket going back on - you can take a straight edge across the engine gasket to breather shim and measure it that way
a noise could have been the breather end play or lack of hard to tell not hearing it -- what is normal and what is something different
Last edited by johnjzjz; Oct 5, 2018 at 06:02 AM.
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Stellar HDF Member
Joined: Apr 2007
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the cam bushing shows wear that would indicate the cam shaft was angled into it, not fitting straight into it.
wear on the upper half of the outward facing shoulder, and inner shaft wear on the lower half of the bushing.
I get what your saying about the breather, but the uneven cam bushing wear would seem to be more significant.
The side hole in the cam bushing made me think it was a side oiler cam cover, along with the -70 part number.
wear on the upper half of the outward facing shoulder, and inner shaft wear on the lower half of the bushing.
I get what your saying about the breather, but the uneven cam bushing wear would seem to be more significant.
The side hole in the cam bushing made me think it was a side oiler cam cover, along with the -70 part number.
Last edited by pjb; Oct 5, 2018 at 06:08 AM.
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From: la la land jerzey
it comes down to this - if you have no lifter noise hot at idle then the oil pressure loss is not as bad as you think the wear actually is
a real experienced shop in shovels would be needed that is heavily tooled as well - to correct some of the AMF stuff we have seen that is and has not really been that bad now 40 years later and still running
a real experienced shop in shovels would be needed that is heavily tooled as well - to correct some of the AMF stuff we have seen that is and has not really been that bad now 40 years later and still running
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From: Cental, MI
Just always assumed the poor thing was less than happy with it's Owner!!!!!
Last edited by Racepres; Oct 5, 2018 at 09:28 AM.
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From: la la land jerzey
stator will also become noisy in a whine sound - un plug the regulator
transmission ( countershaft ) will also have a while sound when the counter shaft rollers are digging into the shaft and gear
transmission ( countershaft ) will also have a while sound when the counter shaft rollers are digging into the shaft and gear
Last edited by johnjzjz; Oct 5, 2018 at 03:59 PM.
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