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Aug 24th, 2023
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Joined: Apr 2013
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Has a lot to Say!
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OP
Has a lot to Say!
Joined: Apr 2013
Posts: 1,363 Likes: 11 |
Not really sure how to go about this post. So here goes:
Again, my rear end is chirping quite loudly due to the belt rubbing on the rear sprocket. I hosed it out and it was quieter for awhile. I then jacked it up, wiped as much as I could reach, then sprayed the belt and forward and rear sprockets with a silicone spray. The tension is correct and aside from this noise there is nothing to complain about!
The treatment lasted about 15 miles before slowly coming back to the normal loud volume where one is seriously thinking of ear protection!
Most of the problem is that the acoustic noise comes from the gaps where the seat belts come through. It is a direct shot to the rear assembly and that is the problem. Have talked with bikers with belt drives and they all have no complaints since that whole thing is directly under them and there is no direct path for the sound to travel from the source to their ears.
What to do? Silicone was a temporary fix. Washing with power sprays is also a temporary fix. Road grit and mung will attach to the belt and sprocket no matter what you may wish for. Am trying to figure out how to dampen the sound from the rear without making the seat belts unusable but have hit a wall.
Clues? Anybody?
One solution is to forgo using the seat belts and sticking to helmets by stuffing that whole rear access with sound deadeners and killing the seat belt's ability to do any good. I am not a great fan of this.
Notes from afar: When the silicone was working, what an amazing drive it was!
This car is a very mechanical beast but it all worked! I heard everything and it was a royal hoot! then that damn chirping...
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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Joined: Sep 2011
Posts: 14,723 Likes: 149
Member of the Inner Circle
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Member of the Inner Circle
Joined: Sep 2011
Posts: 14,723 Likes: 149 |
donaldosaurus, who is on tour in Italy at the moment, has just had a similar problem. It was so noisy that he was worried that the rear wheel bearings may have been failing. He has a can of silicon with him and a spray with that has resolved the problem for the moment.
It is a bit strange because I understood that belt drives on bikes are used to reduce noise by comparison with chains. Is there some sort of alignment problem with the M3W?
It makes me wonder if some sort of enclosure would not be a good idea. At one time enclosures on rear bike chains were not uncommon.
Peter ![[Linked Image]](http://bradley.it/public_images/drive.jpg)
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Joined: Aug 2013
Posts: 1,562
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Aug 2013
Posts: 1,562 |
I have been toying with the idea of a belt enclosure for a while. As the weather has warmed and the level of dust in th uk has increased so has my belt noise. Been looking at after market Harley plastic belt covers, just not had a chance to do anything yet. They will need adapting and may not cover everything down there but could be useful. The other thought was rigging something up with plastic drain pipe parts. Won't last forever but may work as a proto type.
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Joined: Jul 2013
Posts: 3,660 Likes: 48
Talk Morgan Addict
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Talk Morgan Addict
Joined: Jul 2013
Posts: 3,660 Likes: 48 |
Not really sure how to go about this post. So here goes:
Again, my rear end is chirping quite loudly due to the belt rubbing on the rear sprocket. I hosed it out and it was quieter for awhile. I then jacked it up, wiped as much as I could reach, then sprayed the belt and forward and rear sprockets with a silicone spray. The tension is correct and aside from this noise there is nothing to complain about!
The treatment lasted about 15 miles before slowly coming back to the normal loud volume where one is seriously thinking of ear protection!
Most of the problem is that the acoustic noise comes from the gaps where the seat belts come through. It is a direct shot to the rear assembly and that is the problem. Have talked with bikers with belt drives and they all have no complaints since that whole thing is directly under them and there is no direct path for the sound to travel from the source to their ears.
What to do? Silicone was a temporary fix. Washing with power sprays is also a temporary fix. Road grit and mung will attach to the belt and sprocket no matter what you may wish for. Am trying to figure out how to dampen the sound from the rear without making the seat belts unusable but have hit a wall.
Clues? Anybody?
One solution is to forgo using the seat belts and sticking to helmets by stuffing that whole rear access with sound deadeners and killing the seat belt's ability to do any good. I am not a great fan of this.
Notes from afar: When the silicone was working, what an amazing drive it was!
This car is a very mechanical beast but it all worked! I heard everything and it was a royal hoot! then that damn chirping... Mine's developed the same problem - it's really frustrating. Silicon spray doesn't seem to help at all. Still on the plus side the compensator's gone quiet!
Red Leader 
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Joined: Feb 2011
Posts: 14,009
Member of the Inner Circle
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Member of the Inner Circle
Joined: Feb 2011
Posts: 14,009 |
I wonder if anyone enterprising will come up with a chain drive kit as an option?
Jays
Former Morgan owner. Gone but hopefully not forgotten!
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Joined: Nov 2010
Posts: 1,647
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Nov 2010
Posts: 1,647 |
Does the belt have a spring loaded tensioner?
Jaguar F-Type V6s roadster
2009 Harley Davidson XR1200
1986 Honda VFR750F (RC24)
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Joined: Aug 2013
Posts: 242
L - Learner Plates On
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L - Learner Plates On
Joined: Aug 2013
Posts: 242 |
Have you got the Centa unit Chris?
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Joined: Apr 2013
Posts: 1,363 Likes: 11
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Apr 2013
Posts: 1,363 Likes: 11 |
Does the belt have a spring loaded tensioner? Belt is fixed by locking bolts so you do have to periodically check the tensioning. Manual and dealer state that 1cm deflection is the goal. Mine checks out as that. It will get noisier when looser. These belts are strong! My last one ate the rear sprocket and barely showed any sign of wear. Dealer replaced it anyway and it looked fine!
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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Joined: Jun 2013
Posts: 1,461
Has a lot to Say!
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Has a lot to Say!
Joined: Jun 2013
Posts: 1,461 |
I wonder if anyone enterprising will come up with a chain drive kit as an option? Perhaps one to replace the timing belt also...
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Joined: Apr 2013
Posts: 1,363 Likes: 11
Has a lot to Say!
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OP
Has a lot to Say!
Joined: Apr 2013
Posts: 1,363 Likes: 11 |
I wonder if anyone enterprising will come up with a chain drive kit as an option? Perhaps one to replace the timing belt also... Chains break even more than belts. This is why everyone switched over. With chains one has to keep it clean and lubed. Inside the M3W rear, it gets astonishingly filthy in short order.
What's your mileage? Who cares. Is it practical? See #1. What happens when it rains? You get wet.
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