Author Topic: Noise when on sidestand  (Read 553 times)

Offline roadrocket

  • A's Best Friend
  • ***
  • Join Date: Mar 2006
  • Posts: 188
  • Karma: 1
  • www.roadrocket.dk
Noise when on sidestand
« on: 13.09. 2018 20:01 »
Hello,

I have made a strange and alarming observation on my RR: on the mainstand at idle the bike sounds great, but when on the sidestand at idle I have a noise, not a rattle but rather a grumble. The primary chain is fine, and the clutch can't be wiggled either. Any suggestions?
Good Advice
0
No reactions
Otto in Denmark

Online bsa-bill

  • Wise & Enlightened
  • *
  • Join Date: Mar 2006
  • Posts: 5512
  • Karma: 64
Re: Noise when on sidestand
« Reply #1 on: 13.09. 2018 21:09 »
vibration of the side stand on hard ground ???   -- edit -- and as Musky says harmonics through the frame
(not trying to steal your thunder Musky it just describes better what I meant better
Good Advice
0
No reactions
All the best - Bill
1961 Flash - stock, reliable, steady, fantastic for shopping
1959 Rocket Gold Flash - blinged and tarted up  would have seizure if taken to  Tesco

Online muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8421
  • Karma: 110
  • Lithgow NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: Noise when on sidestand
« Reply #2 on: 13.09. 2018 21:18 »
G'day Otto.
Could be harmonics playing tricks on you. A vibe in the fuel tank, oil tank, tool box, mud guards.
 In the motor it could be a drive side main bearing. Check for end float or up and down movement.
Cheers
Good Advice
0
No reactions
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Offline coater87

  • Wise & Enlightened
  • *
  • Join Date: Jul 2008
  • Posts: 1181
  • Karma: 6
Re: Noise when on sidestand
« Reply #3 on: 13.09. 2018 22:50 »
 You could try getting over or under that frequency by turning the idle speed up or down and seeing if the noise goes away, improves, or stays the same.

 Lee
Good Advice
0
No reactions
Central Wisconsin in the U.S.

Offline BSA_54A10

  • Wise & Enlightened
  • *
  • Join Date: May 2008
  • Posts: 2030
  • Karma: 32
    • BSA National
Re: Noise when on sidestand
« Reply #4 on: 14.09. 2018 07:35 »
Time to get out the stethascope and do some listening , the pinky or tounge to do some feeling
Good Advice
0
No reactions
Bike Beesa
Trevor

Offline baz

  • A's Best Friend
  • ***
  • Join Date: Apr 2012
  • Posts: 56
  • Karma: 2
Re: Noise when on sidestand
« Reply #5 on: 14.09. 2018 17:32 »
Hello,

I have made a strange and alarming observation on my RR: on the mainstand at idle the bike sounds great, but when on the sidestand at idle I have a noise, not a rattle but rather a grumble. The primary chain is fine, and the clutch can't be wiggled either. Any suggestions?
you hear "grumbling" you havent got the side stand on your next door neighbours foot have you?? sorry couldnt help it
if its a deep sounding noise then as others have said take look/listen to the crank and bearings ,if it is more of a rattle could be as simple as the gear box not being fully in neutral mine does this sometimes ,you going to have to investigate this one i'm afraid mate,too risky to ignore ,hope its something simple cheers
Good Advice
0
No reactions

Online morris

  • Wise & Enlightened
  • *
  • Join Date: Aug 2012
  • Posts: 1637
  • Karma: 26
  • Antwerp, Belgium
Re: Noise when on sidestand
« Reply #6 on: 14.09. 2018 21:10 »
Crank web rubbing on one (or more) primary case front screws?
Undo them a turn or two and see if the rumble goes away
Good Advice
0
No reactions
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium

Online muskrat

  • Global Moderator
  • Wise & Enlightened
  • **
  • Join Date: Jul 2009
  • Posts: 8421
  • Karma: 110
  • Lithgow NSW Oz
    • Shoalhaven Classic Motorcycle Club Inc
Re: Noise when on sidestand
« Reply #7 on: 14.09. 2018 21:31 »
And that ^^^ would indicate end float problem.
Cheers
Good Advice
0
No reactions
'51 A7 plunger, '57 A7SS now A10CR,  '83 CB1100F, 88 FXST .
Australia
Muskys Plunger A7

Online morris

  • Wise & Enlightened
  • *
  • Join Date: Aug 2012
  • Posts: 1637
  • Karma: 26
  • Antwerp, Belgium
Re: Noise when on sidestand
« Reply #8 on: 14.09. 2018 22:03 »
And that ^^^ would indicate end float problem.
Cheers
Didn't want to say that, but the word's out now... *eek*
Good Advice
0
No reactions
'58 BSA A 10 SA
'52 BSA A 10 Plunger
'55 MORRIS ISIS
The world looks better from a motorbike
Belgium

Offline roadrocket

  • A's Best Friend
  • ***
  • Join Date: Mar 2006
  • Posts: 188
  • Karma: 1
  • www.roadrocket.dk
Re: Noise when on sidestand
« Reply #9 on: 15.09. 2018 13:56 »
Thanks all, yesterday I took a screwdriver to various parts of the engine, but everything sounded fine. Today I went for a longer trip, and it was back with a vengeance. Couldn't envestigate further in order not to enfuriate the neighbours. Sounds like it comes from the primary transmission, so will start by taking off the cover to what's what. I have of course fears of end float problems, but have dismissed them as unlikely, as the entire bottom end was done very thoroughly by the best place n the country only a few 1000 km's ago.
Good Advice
0
No reactions
Otto in Denmark

Offline duTch

  • Ricketty Rocketty Golden Flashback
  • Wise & Enlightened
  • *
  • Join Date: Oct 2011
  • Posts: 4540
  • Karma: 41
Re: Noise when on sidestand
« Reply #10 on: 15.09. 2018 17:52 »

 Cush drive nut may have come loose and grinding a hole in the cover
Good Advice
0
No reactions
Started building in about 1977/8 a on average '52 A10 -built from bits 'n pieces never resto intended -maybe 'personalised'
Have a '74 850T Moto Guzzi since '92-best thing I ever bought doesn't need a kickstart 'cos it bump starts sooooooooo(mostly) easy
Australia

Offline baz

  • A's Best Friend
  • ***
  • Join Date: Apr 2012
  • Posts: 56
  • Karma: 2
Re: Noise when on sidestand
« Reply #11 on: 15.09. 2018 18:32 »
don't ride it any more mate,get the chain case off and take a look
Good Advice
0
No reactions

Online Tim I

  • Active
  • *
  • Join Date: Dec 2017
  • Posts: 2
  • Karma: 0
Re: Noise when on sidestand
« Reply #12 on: 17.09. 2018 15:08 »
Some years ago, after returning home on my A65, I stopped at the end of the driveway pick up my mail.  I left the bike running, and just leaned it over on the side stand. (I almost always use the center stand, but was feeling lazy that day.)  Immediately, there was a terrible screeching sound!  Upon investigation, I found a that the timing pointer inside the primary cover had scribed a perfect circle on the alternator rotor.  The crank endplay was that much!  If that hadn't happened, I'm sure I would have continued happily riding that bike until a rod came through the case.  Of course there's no timing pointer on an A10, but I agree that the bike is trying to tell you something.
Good Advice
0
No reactions