My almost-new SA three speed shifter just fell apart in my hands (having dropped the cable half way up a hill, leaving me in top )
The thumb shifter element just fell out.
Has anyone else seen anything like this?
Sturmer Archer 3 speed shifter failure
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Sturmer Archer 3 speed shifter failure
Postby Thoglette » Sat Mar 15, 2014 9:54 pm
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Re: Sturmer Archer 3 speed shifter failure
Postby koshari » Sat Mar 15, 2014 9:56 pm
Was very common in the old dragster days. Used to look round for an old ringpull or something else to keep tension on the chain to limp home.
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Re: Sturmer Archer 3 speed shifter failure
Postby koen » Sat Mar 15, 2014 11:35 pm
Not had experience with new thumbies. I used to use an old victa throttle lever on my high school bike SA wheel. Worked a treat though I never chanced a missed 2nd gear (there was that neutral spot) and used to go first to third.
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Re: Sturmer Archer 3 speed shifter failure
Postby Miyata_912 » Sun Mar 16, 2014 9:03 am
which shifter are you refering to, the standard 'retro' one or the extra heavy duty one?
N + 1
1986 Team Miyata
1988 Miyata 912
Prototype handmade Bamboo 3 speed
1996 Kona Kilauea
1986 Team Miyata
1988 Miyata 912
Prototype handmade Bamboo 3 speed
1996 Kona Kilauea
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Re: Sturmer Archer 3 speed shifter failure
Postby Thoglette » Sun Mar 16, 2014 3:58 pm
The standard late seventies three speed with the black plastic housing.Miyata_912 wrote:which shifter are you refering to, the standard 'retro' one or the extra heavy duty one?
(See Martin Hanczyc's 2006 list )
Looking at Sheldon's pageit seems that one of the two toothed black "plates" has completely disappeared on the way home. Plus the bits between them.
(Image from Sheldon's site)
Stop handing them the stick! - Dave Moulton
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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Re: Sturmer Archer 3 speed shifter failure
Postby Thoglette » Mon Mar 17, 2014 10:12 am
All the bits are there - its just whatever keeps them aligned has failed and the plates no longer stay aligned.Thoglette wrote:Looking at Sheldon's pageit seems that one of the two toothed black "plates" has completely disappeared on the way home. Plus the bits between them.
Stop handing them the stick! - Dave Moulton
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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Re: Sturmer Archer 3 speed shifter failure
Postby Miyata_912 » Mon Mar 17, 2014 7:46 pm
I have never trusted that shifter just looked a little light on. I have been running 3 speeds for a while and have always upgraded to the heavy duty thumb shifter.
N + 1
1986 Team Miyata
1988 Miyata 912
Prototype handmade Bamboo 3 speed
1996 Kona Kilauea
1986 Team Miyata
1988 Miyata 912
Prototype handmade Bamboo 3 speed
1996 Kona Kilauea
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Re: Sturmer Archer 3 speed shifter failure
Postby ammie7 » Tue Mar 18, 2014 6:27 pm
Yes in my day you would put a piece of gravel in between the entry chain n the hub to take up the slack and hold it in gear. The size of the gravel determined the gear.
I have a 'Hercules' 3 SPd A Type 1.
Any ideas from the Muppet Theatre ?
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I have a 'Hercules' 3 SPd A Type 1.
Any ideas from the Muppet Theatre ?
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Re: Sturmer Archer 3 speed shifter failure
Postby Thoglette » Tue Mar 18, 2014 6:38 pm
Miyata_912 wrote:... have always upgraded to the heavy duty thumb shifter.
Which one's that ? I need to buy a new shifter - and would like to do so only once more!
Stop handing them the stick! - Dave Moulton
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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Re: Sturmer Archer 3 speed shifter failure
Postby ammie7 » Tue Mar 18, 2014 6:54 pm
It depends on the look your after. The early 3spd S/A shifters do the trick. If you want a nice sturdy thumb shifter, with the early look. You can get a 'timing advance' lever from any vintage motorbike shop.
But the plastic S/A ones are based on second order levers which require good alignment.(actually the same mechanism as a rifle trigger).
So if you pull it left or right out of its plane of action it becomes loose. "User Error"
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But the plastic S/A ones are based on second order levers which require good alignment.(actually the same mechanism as a rifle trigger).
So if you pull it left or right out of its plane of action it becomes loose. "User Error"
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Re: Sturmer Archer 3 speed shifter failure
Postby Thoglette » Sun Apr 20, 2014 4:32 pm
Bit like the "user error" causing them to jump out of top under load (see Jobst Brandt, 2002) when TooLongLegs gets on themammie7 wrote:But the plastic S/A ones are based on second order levers which require good alignment.(actually the same mechanism as a rifle trigger).
So if you pull it left or right out of its plane of action it becomes loose. "User Error"
Stop handing them the stick! - Dave Moulton
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
"People are worthy of respect, ideas are not." Peter Ellerton, UQ
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