The Audio-Talk Motorcycling thread.
- Dave the bass
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#211 Re: The Audio-Talk Motorcycling thread.
I've done a lot of learning recently. Ignition timing, its quite important isn't it
The Advance/Retard unit on the mighty Bullet appears to have seized in a middle position, somewhere between the 10 degree and 32 degrees it should be at full advance or retard.
This is the unit...
The grease on the points cam has gone solid and cam no longer responds to the influence of those little bobweights, additionally, the little return springs have been stretched and have lost their 'boingboingyness'. Took me a while to work out whats going on and how it should work.
I've found end float on the distributor pinion too which has cause the AR unit to physically contact the back of the CB plate. Meh...
Livin' n learnin'.
The Advance/Retard unit on the mighty Bullet appears to have seized in a middle position, somewhere between the 10 degree and 32 degrees it should be at full advance or retard.
This is the unit...
The grease on the points cam has gone solid and cam no longer responds to the influence of those little bobweights, additionally, the little return springs have been stretched and have lost their 'boingboingyness'. Took me a while to work out whats going on and how it should work.
I've found end float on the distributor pinion too which has cause the AR unit to physically contact the back of the CB plate. Meh...
Livin' n learnin'.
"The fat bourgeois and his doppelganger"
- IslandPink
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#212 Re: The Audio-Talk Motorcycling thread.
So, after all of this learning, do you feel you're advanced or retarded ?
"Once you find out ... the Circumstances ; then you can go out"
- Dave the bass
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#213 Re: The Audio-Talk Motorcycling thread.
Advanced fo' sho, it's the only way forward.
"The fat bourgeois and his doppelganger"
- Mike H
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#214 Re: The Audio-Talk Motorcycling thread.
Just a bit!Dave the bass wrote: ↑Tue Jun 12, 2018 10:16 pm I've done a lot of learning recently. Ignition timing, its quite important isn't it
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- pre65
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#215 Re: The Audio-Talk Motorcycling thread.
For our DTB.
Have you seen the AMAL tuning guide ?
http://amalcarb.co.uk/downloadfiles/ama ... _guide.pdf
Have you seen the AMAL tuning guide ?
http://amalcarb.co.uk/downloadfiles/ama ... _guide.pdf
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- Mike H
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#216 Re: The Audio-Talk Motorcycling thread.
Line of unrelated context demarcation.
Friday June 8 - (23 minutes)
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Friday June 8 - (23 minutes)
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"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- Dave the bass
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#217 Re: The Audio-Talk Motorcycling thread.
Those place names....you're touring Middle Earth Mike?!
Over in the A-T Cycling thread our Pops asks....
I've owned it for 20 years and when I 1st had it found it would do an odd missfire when it got up to working temperature on occasions, on some of these 'occasions' the carb sometimes got blown totally off its rubber mounting manifold! Great fun I can tell you!
One of the previous owners who'd 'done battle' with it had fitted Boyer Electronic Ignition. Its a Mk3 version that I've read was apparently sensitive to poor battery voltage regulation and would play havoc with the ignition timing curve. I didn't know this at the time and thought it was a carburation fault so I purchased a Mk1 Amal Concentric in late 1999 and fitted it expecting it to solve all the problems, it didn't. So I retired the Bullet shortly after and used it as a workbench for the next 18 years to make various size loud speakers and stuff on....
Fast forwards 18 1/2 years...
The mechanical ignition timing mechanism seized last week causing similar problems to 20 years ago. Aaaarrrggghhh! Only now I know why its doing it and have rectified the problem now. Since having nailed the Ignition timing fault I've been trying to implement the Amal Mk1. I had to open the inlet port out to 30mm to get it to match up with the Carb, 900 series 30mm job. I did that successfully....
...and in addition to a very free flowing exhaust system and miminal air filtering have found the jetting is now on the lean-side because the carb was supplied set up specc'd with the restrictive convoluted Indian Air filter system and very heavily baffled exhaust system. Thats all gone now so I've had to learn how to plug chop, read, re jet and fettle the carb to avoid glitches in the throttle response.
A mate who races a pair of Yamaha SR500's has supplied a pair of throttle slides with a different cutaway to better match my current air filter and exhaust combo for testing purposes.
Brum brum! Getting there...
https://www.dropbox.com/s/fhplqshroz9v6 ... 6.mp4?dl=0
Over in the A-T Cycling thread our Pops asks....
Yes, for starters just the mere fact its an Indian Enfield from the early 90's
I've owned it for 20 years and when I 1st had it found it would do an odd missfire when it got up to working temperature on occasions, on some of these 'occasions' the carb sometimes got blown totally off its rubber mounting manifold! Great fun I can tell you!
One of the previous owners who'd 'done battle' with it had fitted Boyer Electronic Ignition. Its a Mk3 version that I've read was apparently sensitive to poor battery voltage regulation and would play havoc with the ignition timing curve. I didn't know this at the time and thought it was a carburation fault so I purchased a Mk1 Amal Concentric in late 1999 and fitted it expecting it to solve all the problems, it didn't. So I retired the Bullet shortly after and used it as a workbench for the next 18 years to make various size loud speakers and stuff on....
Fast forwards 18 1/2 years...
The mechanical ignition timing mechanism seized last week causing similar problems to 20 years ago. Aaaarrrggghhh! Only now I know why its doing it and have rectified the problem now. Since having nailed the Ignition timing fault I've been trying to implement the Amal Mk1. I had to open the inlet port out to 30mm to get it to match up with the Carb, 900 series 30mm job. I did that successfully....
...and in addition to a very free flowing exhaust system and miminal air filtering have found the jetting is now on the lean-side because the carb was supplied set up specc'd with the restrictive convoluted Indian Air filter system and very heavily baffled exhaust system. Thats all gone now so I've had to learn how to plug chop, read, re jet and fettle the carb to avoid glitches in the throttle response.
A mate who races a pair of Yamaha SR500's has supplied a pair of throttle slides with a different cutaway to better match my current air filter and exhaust combo for testing purposes.
Brum brum! Getting there...
https://www.dropbox.com/s/fhplqshroz9v6 ... 6.mp4?dl=0
"The fat bourgeois and his doppelganger"
- pre65
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#218 Re: The Audio-Talk Motorcycling thread.
Well done Dave, you seem to be on top of the situation.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- Dave the bass
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#219 Re: The Audio-Talk Motorcycling thread.
Thanks Popz, yeah getting there.
"The fat bourgeois and his doppelganger"
- Mike H
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#220 Re: The Audio-Talk Motorcycling thread.
All very good. Watching ..
Line of unrelated context demarcation.
Tuesday June 5th:
Devizes to Rhosgoch(YouTube, timelapse, 13 minutes)
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Line of unrelated context demarcation.
Tuesday June 5th:
Devizes to Rhosgoch(YouTube, timelapse, 13 minutes)
-
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."
- andrew Ivimey
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#221 Re: The Audio-Talk Motorcycling thread.
Slightly bizarre, kind of uncomfortable....the music counterpoints the surrealism of the underlying metaphor.... I quite liked it!
Philosophers have only interpreted the world - the point, however, is to change it. No it isn't ... maybe we should leave it alone for a while.
#222 Re: The Audio-Talk Motorcycling thread.
Dave, I think that’s an Amal Mk2 concentric you are showing there. The Mk1 had the float chamber mounted to the side of the carb body. If you think a Mk2 is fiddly to tune, you should try a Mk1. Nightmare!
- pre65
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#223 Re: The Audio-Talk Motorcycling thread.
Dave's carb is an Amal concentric.(Mk 1)
The Concentric Mk 2 is very different.
The Amal with the side mounted chamber was the Monoblock.
The Concentric Mk 2 is very different.
The Amal with the side mounted chamber was the Monoblock.
The only thing necessary for the triumph of evil is for good men to do nothing.
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
Edmund Burke
G-Popz THE easy listening connoisseur. (Philip)
- Mike H
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#224 Re: The Audio-Talk Motorcycling thread.
Oh yes, all of that!andrew Ivimey wrote: ↑Mon Jun 18, 2018 11:17 am Slightly bizarre, kind of uncomfortable....the music counterpoints the surrealism of the underlying metaphor.... I quite liked it!
I don't just throw this stuff together you know
"No matter how fast light travels it finds that the darkness has always got there first, and is waiting for it."