Idle problem solved

Tony,
I'm sure that the V4 utilizes a ride-by-wire style throttle system.
But it's probably considerably more expensive that the old cable operated throttle systems.
It's the way to go today.
 
BritTwit said:
Tony,
I'm sure that the V4 utilizes a ride-by-wire style throttle system.
But it's probably considerably more expensive that the old cable operated throttle systems.
It's the way to go today.
Click to expand...
Yes Point well taken. But there are variations of this theme . New Kawasaki's ( ZX10R , Z650 , Z900RS ) use throttle cables also , and the rest is done at the throttle body and ECU. How about the New Triumph you have ? Is there a mechanical throttle cables or just electical wires ?
 
TonyA said:
Yes Point well taken. But there are variations of this theme . New Kawasaki's ( ZX10R , Z650 , Z900RS ) use throttle cables also , and the rest is done at the throttle body and ECU. How about the New Triumph you have ? Is there a mechanical throttle cables or just electical wires ?
Click to expand...
The Speed Twin has a full ride-by-wire system.
Throttle grip has only a silly little wire. Well, it's actually several wires and an electrical connector, no cables though. The ECU uses info from the handlebar throttle and controls the throttle body servos that activate the throttle valves. I had my concerns about the ECU overruling my throttle commands, but I have to admit operation is pretty slick and so far, faultless. The one possible downside is that if the throttle body on the engine, which is manufactured as one unit, needs to be replacement it costs $1,700. Ouch!
There was someone on the Triumphrat forum who had to replace a faulty throttle body that was out of warranty.
 
BritTwit said:
Bet you're right.
No one is paying $40K for a bike that can't start easily, idle or run properly.

The EFI on the 961 was a bargain basement unit for SG. It is crap, but kept the cost down.
And fixing it seems like a science project for owners, try this, try that, maybe it's better, maybe not...
Best fix is for Norton to swap it out for one half of a V4 system, or a Keihin EFI system, then be done with it once and for all.
Charge more for the 961 if necessary, but owners of any modern bike should have to start a science project to get their 961 to run properly.
Dr. Bob should think very carefully about this, if he entertains the notion of continuing 961 production.
Click to expand...
I'm sorry, but I don't see how components like Jenvey, OMEX or SCS could be seen as bargain basement. If you wanted to go cheap - you can get waaaaaay cheaper than any of those components. I think they owe more to country of manufacture/heritage for their selection than being cheap.

In the time since the original 961 there have been huge improvements in ecu's and moves to servo driven actuators and other ancillaries. If anything has been true, its that the 961 appears to have remained fairly consistent during its model run, rather than modernized. Its not reasonable to compare the 2020 tech to 2010.
 
Gojuu said:
I'm sorry, but I don't see how components like Jenvey, OMEX or SCS could be seen as bargain basement. If you wanted to go cheap - you can get waaaaaay cheaper than any of those components. I think they owe more to country of manufacture/heritage for their selection than being cheap.

In the time since the original 961 there have been huge improvements in ecu's and moves to servo driven actuators and other ancillaries. If anything has been true, its that the 961 appears to have remained fairly consistent during its model run, rather than modernized. Its not reasonable to compare the 2020 tech to 2010.
Click to expand...
Agreed.
Look how many manufacturers make weekly, monthly, yearly improvements. Technology changes everyday.
Not only in electronics but also mechanical.
 
Yep, I’m not of the view it was bottom drawer, but concede it was of it’s time....but still current. Throttle bodies are pretty simple things....and they do make me marvel about how a ‘simple’ carb can do so well....they really are impressive, with idle circuits, mains, accelerator pumps etc, all working together so well....mostly.

I Kinda like the simplicity of the current set up.
 
I wanted to bring this thread back because I have had good success with the blocking of the IAC passage as well. I must admit I was hesitant to go the whole way but I finally did it . I had been running the block at the Idle motor only just to get a basic setting of the throttle flaps voltage . But I have since had a aluminum plug made to block the passage between the throats and wanted to report back.
First : The idle is fantastic , stable and never varies once warmed up.
Second : The starting is improved - hell yes starts and idles at 800 rpm just like iwilson been saying !
Third : The bike is quieter and smoother at idle .
Fourth : Off idle throttle response superb , where it should have been all along .

My thanks to all involved especially iwilson for his work with this .
 
Tony,
Great, that sounds like a win.
Can the oil pump deliver sufficient oil volume at 800RPM?
 
I'm using a Ducati/Domino throttle tube assembly on mine. Ducati's answer to a cold start fast idle back in the 90s was a simple little mechanical throttle tube stop button that cracks the throttle open a touch, and is easily knocked off with the twist grip.
 

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Stu Bodycote said:
I'm using a Ducati/Domino throttle tube assembly on mine. Ducati's answer to a cold start fast idle back in the 90s was a simple little mechanical throttle tube stop button that cracks the throttle open a touch, and is easily knocked off with the twist grip.
Click to expand...
Hi Stu , Your throttle stop looks much cleaner than mine !
 
Cheers, I just copied my 748... works for those.
You can see the hidden fast idle throttle stop button here..
 

Attachments

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Stu Bodycote said:
I'm using a Ducati/Domino throttle tube assembly on mine. Ducati's answer to a cold start fast idle back in the 90s was a simple little mechanical throttle tube stop button that cracks the throttle open a touch, and is easily knocked off with the twist grip.
Click to expand...
For a knob like myself, can you provide a part number and how this set up works?
Dose it require a different throttle cable?
Will this work on both my dominator and also my commando? The commando has regular handle bars
 
Stu Bodycote said:
I'm using a Ducati/Domino throttle tube assembly on mine. Ducati's answer to a cold start fast idle back in the 90s was a simple little mechanical throttle tube stop button that cracks the throttle open a touch, and is easily knocked off with the twist grip.
Click to expand...
My 2003 Ducati 999 has the same setup, but I never bothered to check it's function out.
 
Voodooo said:
For a knob like myself, can you provide a part number and how this set up works?
Dose it require a different throttle cable?
Will this work on both my dominator and also my commando? The commando has regular handle bars
Click to expand...
Ditto here.
An explanation would be great, a bit of a dill weed myself.;)
 
Stu Bodycote said:
I'm using a Ducati/Domino throttle tube assembly on mine. Ducati's answer to a cold start fast idle back in the 90s was a simple little mechanical throttle tube stop button that cracks the throttle open a touch, and is easily knocked off with the twist grip.
Click to expand...
Hi Stu , Looks like a single pull throttle cable ?
 
TonyA said:
I wanted to bring this thread back because I have had good success with the blocking of the IAC passage as well. I must admit I was hesitant to go the whole way but I finally did it . I had been running the block at the Idle motor only just to get a basic setting of the throttle flaps voltage . But I have since had a aluminum plug made to block the passage between the throats and wanted to report back.
First : The idle is fantastic , stable and never varies once warmed up.
Second : The starting is improved - hell yes starts and idles at 800 rpm just like iwilson been saying !
Third : The bike is quieter and smoother at idle .
Fourth : Off idle throttle response superb , where it should have been all along .

My thanks to all involved especially iwilson for his work with this .
Click to expand...
That's great to hear Tony. It would be interesting to put some vacuum gauges on each throttle barrel to see how even they are now.
 

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