Need MK3 throttle cable measurement

jseng1

jseng1

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I need the throttle inner cable measurement of a Mk3 as shown in the photo (making up a custom cable). This measurement is with the carbs still attached but the twist grip removed and the cable pulled tight with carbs at idle. My email is jim@jsmotorsport.com. Thank you in advance.

Need MK3 throttle cable measurement
 
62mm - is the total length of exposed inner wire ( between the end of the threaded part & the bottom of the nipple) presuming the picture of the cable is at the twistgrip end ?
 
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Desmopower said:
62mm - is the total length of exposed inner wire ( between the end of the threaded part & the bottom of the nipple) presuming the picture of the cable is at the twistgrip end ?
Click to expand...
Big thanks Desmopower. By "bottom of the nipple" I presume you mean the close side of the nipple (not the far side).
Yes its the twist grip end. Now I can finish this project.
 
Yes, the close side to the threaded end ( 62mm total visible exposed inner wire) I measured off a spare cable I had - the carbs were not attached, so the cable from the twistgrip to the splitter for dual amals. I hope this was what you were after ???? 🤔
 
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jseng1 said:
Big thanks Desmopower. By "bottom of the nipple" I presume you mean the close side of the nipple (not the far side).
Yes its the twist grip end. Now I can finish this project.
Click to expand...

Unless you intend to fit an inline adjuster or Mk3 cable guide you may need to reduce the (62mm) inner cable free length by approximately 6mm/ 1/4" because the threaded fitting in your picture (if that's what you are going to use?) will mostly be taken up when screwed into the twistgrip housing so it won't have much range of adjustment.
Need MK3 throttle cable measurement
 
Desmopower - was the plastic splitter along with its internal piston attached when you made the measurement? It would be better if the carbs were connected but I can figure it out as long as the splitter was complete (the splitter has 37mm of travel).

Lab - there is an inline adjuster part way down the cable for taking up slack.
 
The cable was off the bike, so it was not connected to anything. It is the standard mk3 cable from the twistgrip to the splitter.
I made a cable to use with Don Penders carb gantry that I fitted to my mk3 and from memory I gave it between 60mm to 65mm exposed inner cable lenght.
The cable worked fine as there was adjustment fittings at the gantry end. ( I don't think the lenght would need to be spot on at 62mm)
 
marshg246 said:
Not answerable :( Over the years, different twistgrips (Amal, Dowerty, et. Al.) had different requirements. Today, AN sells junction to twistgrip cables with two different free lengths but those are measured with the cable alone.
Click to expand...

It is answerable if this particular 850 Mk3 has its original combined twistgrip and switch cluster assembly (no mention of it not having the Mk3 twistgrip) because the standard upper section inner cable free length is 2 1/2" (or approx. 62mm).
Need MK3 throttle cable measurement
 
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marshg246 said:
The current AN carb to junction cables have 3.5" free length and they work fine with genuine Amal junction boxes.
Click to expand...

The current AN carb-to-junction box cables for the Amal quick action twistgrip are 3.06" free length.

Deleted
 
L.A.B. said:
The current AN carb-to-junction box cables for the Amal quick action twistgrip are 3.06" free length.
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
The AN cables for the standard action twistgrip are 2.44" free length.
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
andover-norton.co.uk

Motorcycle parts and spares for Norton motorbikes - Genuine Andover Norton Spare Parts - Andover Norton Motorcycles Parts - Original Andover Norton Parts

Motorcycle parts and spares for Andover Norton motorbikes: Andover Norton manufactures and supplies all Genuine Factory Spare Parts for Norton motorcycles built before 2002.
andover-norton.co.uk
Click to expand...

You quoted my statement: "The current AN carb to junction cables have 3.5" free length and they work fine with genuine Amal junction boxes." and tried to show me wrong by linking to the twistgrip end cables.

The carb to junction box cables are: https://andover-norton.co.uk/en/shop-details/16698/throttle-cable-carb-end-03-3145-

I measured the free length yesterday at 3-1/2". The prior set I had were 3-3/8". AFAIK, AN does not list the free length of those cables.

Picking apart a post often makes sense, but my post only made sense as a whole - picking it apart easily makes things look wrong.
 
marshg246 said:
You quoted my statement: "The current AN carb to junction cables have 3.5" free length and they work fine with genuine Amal junction boxes." and tried to show me wrong by linking to the twistgrip end cables.

The carb to junction box cables are: https://andover-norton.co.uk/en/shop-details/16698/throttle-cable-carb-end-03-3145-

I measured the free length yesterday at 3-1/2". The prior set I had were 3-3/8". AFAIK, AN does not list the free length of those cables.

Picking apart a post often makes sense, but my post only made sense as a whole - picking it apart easily makes things look wrong.
Click to expand...

Ok, I apologise, I read carb to junction wrong.
At least I have the grace to apologise (unlike your PM when you got it wrong).

  • "Deleted by marshg246
  • Reason: Les keeps picking it apart to prove me wrong rather than looking at the whole post."
Click to expand...

  • No, just attempting to point out that your information regarding pre-Mk3 cables was irrelevant as JS said nothing about the twistgrip not being the original Mk3 type.
 
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L.A.B. said:
Ok, I apologise, I read carb to junction wrong.
At least I have the grace to apologise (unlike your PM when you got it wrong).
Click to expand...
Since you want it public, I did admit the one part I got wrong in the PM. I disagree that I "got it wrong".

Taking each statement from the whole was the only way you could find anything I said in my post wrong, so you were the one that was wrong.

I have deleted the post - if you can't understand it even after I pointed out your mistake, then I must not have written it clearly and I certainly don't participate here to mislead people.

I apologize to all for making a post that apparently was confusing and started a tangent in this thread.

For the record, I appreciate what LES does for us all, but moderator is not another word for God and although he knows more than me and others on many Norton subjects, he is not all knowing. If he were we would not need a forum, we would just need a "Ask LES a question" system.

BTW, I do PM LES with questions and I'm thankful he's willing to answer them.
 
marshg246 said:
I did admit the one part I got wrong in the PM. I disagree that I "got it wrong".
Click to expand...

So you admit you got something wrong but you disagree you got it wrong.
Ok.

marshg246 said:
I have deleted the post - if you can't understand it even after I pointed out your mistake, then I must not have written it clearly and I certainly don't participate here to mislead people.
Click to expand...

I simply said that JS's question was answerable as there seemed to be no doubt about the type of twistgrip (Mk3). The information regarding pre-Mk3 cables you gave was mostly irrelevant and in my opinion not what JS asked.

marshg246 said:
For the record, I appreciate what LES does for us all, but moderator is not another word for God and although he knows more than me and others on many Norton subjects, he is not all knowing. If he were we would not need a forum, we would just need a "Ask LES a question" system.
Click to expand...

Ok, so you are a bit put out because I disagreed with you as a fellow forum member. I DO NOT consider that to be playing God so your comments are uncalled-for.
Edit: I would also hasten to add that I have never abused my position as moderator to threaten, intimidate, browbeat you or otherwise influence any discussion we may have had either now or in the past.

marshg246 said:
BTW, I do PM LES with questions and I'm thankful he's willing to answer them.
Click to expand...

Yes, you certainly do. With that sort of abuse, I wonder why I bother answering if that's what you really think of me.
 
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L.A.B. said:
So you admit you got something wrong but you disagree you got it wrong.
Ok.

Yes, I got one thing wrong in the PM which I owned. My original post was not wrong but you insist that it was.

I simply said that JS's question was answerable as there seemed to be no doubt about the type of twistgrip (Mk3). The information regarding pre-Mk3 cables you gave was mostly irrelevant and in my opinion not what JS asked.

My complaint in the PM was that you certainly would not allow me to assume that the twistgrip or anything else was standard, especially when he stated a custom cable!

Ok, so you are a bit put out because I disagreed with you as a fellow forum member. I DO NOT consider that to be playing God so your comments are uncalled-for.

You bringing the dispute pubic was uncalled-for.

Yes, you certainly do. With that sort of abuse, I wonder why I bother answering if that's what you really think of me.
Click to expand...

Don't worry, I won't bother you again - you've made it very clear what you think of me and you didn't keep it private. I'll try not to reply to any more threads where you have already posted.
 
...And finally (perhaps?) after JS contacted me via PM and stripping down my Mk3's twistgrip, an answer to the original question...
jseng1 said:
This measurement is with the carbs still attached but the twist grip removed and the cable pulled tight with carbs at idle.
Click to expand...
...(From the screw fitting to the far end of the nipple) is 17mm, 11/16".
Need MK3 throttle cable measurement
Edit:
marshg246 said:
Don't worry, I won't bother you again - you've made it very clear what you think of me and you didn't keep it private.
Click to expand...
That's hilarious considering your opinion of me which you were more than happy to post on the forum. I also did not reveal any "private" information or said anything about what I'm supposed to think of you.
 
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