HEARING SPINNING SOUND FROM POSS. TRANS.

[phatchopper300]

I hope I can explain my problem? Ok as I was riding last night about 45 min. into the ride I started hearing a spinning grinding sound of which almost sounded like the primary chain hitting the front cover of the outer primary? It seemed to only do it when I would turn the throttle and as I would let off the throttle it would after a few sec. stop. It will not do it with the clutch pulled in it would stop instantly.???:bang:. Now to help with that being said I just about a week ago adjusted the clutch was having problem getting it in neutral. Bike has run great in the last week. Would the cold effect the fluid in the trans or primary. Low fluid in trans make that sound? I looked at primary chain it seems to be tight? Need help with diagnoses!! Thanks
Mike

 

[BikersDream]

First is the service up to date? If so who changed the fluid last in the trans? If service was done and you know the trans is full of fluid, put it up on a flat jack with bike in neutral spin the wheel slow. Listen for any noise from trans or primary side. You can remove the top cover of the trans to inspect gear set. This should give you some direction in what way to go from here.

 

[phatchopper300]

First is the service up to date? If so who changed the fluid last in the trans? If service was done and you know the trans is full of fluid, put it up on a flat jack with bike in neutral spin the wheel slow. Listen for any noise from trans or primary side. You can remove the top cover of the trans to inspect gear set. This should give you some direction in what way to go from here.

Thanks I plan to dig into it tonight. I had just serviced it myself all fluids to spec. 20 oz in trans. and 1 qt in primary. Full synthetic amsoil in primary. It seems to only do this sound when in gear? it is not constant sound and no loss of power. Shifts into gear well. I even kept it in 3rd with constant speed of about 45 and no sound for miles? Thanks for the input. Will post findings after looky.

 

[woodbutcher]

check the clutch hub nut to see if it has come loose.

 

[phatchopper300]

check the clutch hub nut to see if it has come loose.

Yep that was the first thing I looked at all is good tight as a whistle? Stupid question to make sure I understand the clutch hub nut is right behind muffler next to tranny. The only thing to do is to look at tranny and look at primary chain slack. I had tightened the primary chain up about 2 weeks ago it was very loose.

 

[twowheel99]

Pulling the clutch lever in has no effect on the primay chain and gears because the continue to spin if the engine is running. Might be the clutch basket, or the nut/adjustment screw on the clutch has loosened up, compensator nut or the noise could be coming from the transmission itself. Check the easy stuff first and let us know what you find. Also if you have a lift you can lift the bike up in the air and start it and put it into gear and listen for the sound to pin-point where its coming from. Make sure it secure and try and have someone with you to operate the throttle & clutch while you work your way around the bike. BUT BE CAREFUL!!!!!!
2

 

[woodbutcher]

clutch hub nut is inside the primary cover on the side opposite the exhaust.

 

[phatchopper300]

Pulling the clutch lever in has no effect on the primay chain and gears because the continue to spin if the engine is running. Might be the clutch basket, or the nut/adjustment screw on the clutch has loosened up, compensator nut or the noise could be coming from the transmission itself. Check the easy stuff first and let us know what you find. Also if you have a lift you can lift the bike up in the air and start it and put it into gear and listen for the sound to pin-point where its coming from. Make sure it secure and try and have someone with you to operate the throttle & clutch while you work your way around the bike. BUT BE CAREFUL!!!!!!
2

Will do! Where is the compensator nut. another stupid question- learning as I go thanks for all the help guys!

 

[2004BC]

The compensator nut is the nut that holds the front primary chain gear onto the crankshaft off the primary side of your engine. You can't really get at it unless you take off your outer primary cover.

 

[phatchopper300]

The compensator nut is the nut that holds the front primary chain gear onto the crankshaft off the primary side of your engine. You can't really get at it unless you take off your outer primary cover.

I plan on takin off the primary cover to inspect. Thanks :up:

 

[Raywood]

Will do! Where is the compensator nut. another stupid question- learning as I go thanks for all the help guys!

06 doesn't have a compensating nut.

 

[phatchopper300]

It sounds very much like your primary chain is loose. I know you said that you checked, and it was not.
I'm going to ask a stupid question here, sooo....
But did you put it in gear and rotate the rear tire too check it at it's loosest point?

dead [/QUOTE]


Dumb answer.... oh CHIT..... No I better recheck and thanks for the info....again learned something new!! Will be pulling off the primary cover tonight and checking all nuts and bolts and tention on the primary chain!!! I am putting in 20/50 amsoil 1 qt.:bang:

 

[phatchopper300]

Phat,
Just pull off your insp. plate first to see if that's the problem. If not, then go ahead and pull off the cover.

:2thumbs:

dead

Yep did that last night checked the chain it was tight. But did not put it in gear, Can I pull the clutch leaver spin the tire and then check the chain. Just want to make sure I check all areas of the chain.

 

[phatchopper300]

Forget clutch lever when doing this check. :nono:
You want the engine and trans resistance to be used in order to tighten primary chain by rotating the rear tire by hand.

:2thumbs:

dead

:2thumbs:

Got it!! Little slow but will catch on quickly.

 

[phatchopper300]

:2thumbs::2thumbs::2thumbs:



Maybe I need to open up a BDM shop on the corner somewhere on Main St. USA?

Yea, I know that sounds scary to me too!

:roll::roll::roll::roll::roll::roll:

:2thumbs::2thumbs:Thanks for all your input and knowledge. I will post my findings when done.
Knowledge is power!!! Can have a rolling garage you go to the customer.

 

[BikersDream]

:2thumbs::2thumbs::2thumbs:



Maybe I need to open up a BDM shop on the corner somewhere on Main St. USA?

Yea, I know that sounds scary to me too!

:roll::roll::roll::roll::roll::roll:

:iagree::iagree::iagree:

Maybe you could use a little more help at your new shop? Have job will travel.

 

[stlmikie]

What guide line did you tighten the primary chain up by. The tend to look very loose. They by no means are supposed to be tight.

Yep that was the first thing I looked at all is good tight as a whistle? Stupid question to make sure I understand the clutch hub nut is right behind muffler next to tranny. The only thing to do is to look at tranny and look at primary chain slack. I had tightened the primary chain up about 2 weeks ago it was very loose.

 

[stlmikie]

Sorry didn't read deads postes.

 

[phatchopper300]

UP date I pulled the primary and checked the chain for slack at different gears and places by spinning the wheel. That seems fine. No metal shavings on primary drain plug-good sign there. I readjusted the clutch rod goes into neutral good and shifts well. Still a little hard shifting. I did notice that when in neutral I can hear what seems like the gears are like its getting ready to go into 1st or 2nd. When shifting into thoes gears the noise stops. Its not a grinding sound like its trying to grab the next gear. Does the clutch rod need more adjustment. Any suggestions? Thanks

 

[woodbutcher]

while you were in the primary, did you check to see if the nut that holds the clutch pack/basket was tight? this nut is on the other end of the clutch rod that you adjust on the exhaust side of the bike. if it is not properly torqued to 150ftlb with red loctite, (some of the bikes got out of the factory without loctite) the nut will back off. this is what i was referring to earlier. there was a factory service bulletin regarding this very situation. if you did this, please disregard this message.