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Old 04-25-2014, 08:00 AM   #1
toates89 OP
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Push Pull Cable

I have a dr350 and the throttle wont close while off and will while running. After pulling the cables i notice the push cable creates just enough friction to cause me some issues.

Ive read that many just remove it. I was wondering does anyone disconnect and leave it there incase their original cable snaps they could re route the push to be a secondary pull cable?
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Old 04-25-2014, 08:34 AM   #2
Boon Booni
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Sometimes too much tension between the two cables can cause an issue. Try putting a little slack into the close cable and see if it helps.
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Old 04-25-2014, 01:47 PM   #3
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It's all too easy to create a binding condition by misadjusting the cables. Both cables pull, there's no pushing involved.

Start by slacking off the closing cable. Then adjust the opening cable so there's minimal slack when opening the throttle. Now, adjust the closing cable so there's just a little slack in it. That way, neither cable interferes with the other. The only reason the closing cable is there is to provide positive throttle closure in case a return spring fails or something binds up. Otherwise, it serves no function and just goes along for the ride.
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Old 04-25-2014, 04:30 PM   #4
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Quote:
Originally Posted by toates89 View Post
I have a dr350 and the throttle wont close while off and will while running. After pulling the cables i notice the push cable creates just enough friction to cause me some issues.

Ive read that many just remove it. I was wondering does anyone disconnect and leave it there incase their original cable snaps they could re route the push to be a secondary pull cable?
Before you consider whether to disconnect it or fix it so it works properly, ask yourself why the original manufacturer put it there in the first place. Was it:

(a) he had an excess number of cables in stock so needed to use em up,
(b) was being considerate by supplying a spare.
(c) thought 2 cables looked cooler than one.
(d) fitted it as a safety device to pull the throttle shut in the slim chance the return spring snapped or opening cable jammed.
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Old 04-25-2014, 05:48 PM   #5
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It's "C" isn't it?

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Old 04-25-2014, 09:50 PM   #6
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Quote:
Originally Posted by ttpete View Post
It's all too easy to create a binding condition by misadjusting the cables. Both cables pull, there's no pushing involved.
Pull open, pull closed.

Quote:
Originally Posted by ttpete View Post
Start by slacking off the closing cable. Then adjust the opening cable so there's minimal slack when opening the throttle. Now, adjust the closing cable so there's just a little slack in it. That way, neither cable interferes with the other. The only reason the closing cable is there is to provide positive throttle closure in case a return spring fails or something binds up. Otherwise, it serves no function and just goes along for the ride.
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Old 04-25-2014, 11:14 PM   #7
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In my humble opinion, I have found:

Keeping things very close to stock causes LESS problems.

Maybe you adjust your fuel idle mixture, get the carb changed for your altitude, but overall KISS (Keep It Simple Sweetheart).

The previous posters are right on about been careful to make some slack between the cables to they are not binding the assembly. I've also had good luck with taking the whole throttle assembly apart and wash it in hot soapy water (dishwashing soap works well). Clean plastic is slippery.

Also, worn-out throttle cables will have some drag in them as the plastic liner-friction bushings wear out and the cables rub against metal at some internal aspect. Sometimes new (or less used, ie from eBay used) will cure the sticking or dragging throttle. I've fixed a few bikes that wouldn't allow the throttle to return unless the handlebars were turned just so and the throttle would snap back closed ... due to the throttle cables being worn out and friction happening inside the cable liners at certain angles.

After a lot of hours trying to fix a lot of my own and customers bikes ...

that is my $0.02 :)
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Old 04-26-2014, 03:56 AM   #8
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You might also try lubing the cables.
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Old 04-26-2014, 05:27 AM   #9
markk53
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Quote:
Originally Posted by JohnCW View Post
Before you consider whether to disconnect it or fix it so it works properly, ask yourself why the original manufacturer put it there in the first place. Was it:

(a) he had an excess number of cables in stock so needed to use em up,
(b) was being considerate by supplying a spare.
(c) thought 2 cables looked cooler than one.
(d) fitted it as a safety device to pull the throttle shut in the slim chance the return spring snapped or opening cable jammed.

I've often wondered if they felt it wasn't needed on all those two strokes why was it suddenly needed on all the four strokes? I haven't removed either of mine, but it does make one curious. Even the ATVs with the thumb throttles on virtually the same bikes use one cable on slide and CV carbs.

Just makes you wonder... Of course if you did have the throttle kind of jam or want to stick open the pull-return will definitely be of value, should that "lightning strike" happen.
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Old 04-26-2014, 05:38 AM   #10
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Quote:
Originally Posted by markk53 View Post
I've often wondered if they felt it wasn't needed on all those two strokes why was it suddenly needed on all the four strokes? I haven't removed either of mine, but it does make one curious. Even the ATVs with the thumb throttles on virtually the same bikes use one cable on slide and CV carbs.

Just makes you wonder... Of course if you did have the throttle kind of jam or want to stick open the pull-return will definitely be of value, should that "lightning strike" happen.
My brother had the throttle stick open on his Ducati monster. The internal sheathing of his cable pulled out and wedged itself in the throttle mechanism. He was doing a track day at the time and got stuck at WFO. Bit of a pucker moment to pull the clutch and find the kill switch.

Bet he wished his duc was equipped with a pull to close cable.
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Old 04-26-2014, 04:49 PM   #11
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Quote:
Originally Posted by toates89 View Post
I have a dr350 and the throttle wont close while off and will while running. After pulling the cables i notice the push cable creates just enough friction to cause me some issues..............
Bowden cables can cease to function smoothly, particularly if water or contaminants get into the housing.
Unless one (or both) of the cables is fraying, proper service (cleaning plus lubrication) will reduce excessive friction between:

1) Cables and housings.
2) Right handle and handlebar.
3) Butterfly valve's pivot and bushings.
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Old 04-27-2014, 05:17 AM   #12
markk53
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Quote:
Originally Posted by lnewqban View Post
Bowden cables can cease to function smoothly, particularly if water or contaminants get into the housing.
Unless one (or both) of the cables is fraying, proper service (cleaning plus lubrication) will reduce excessive friction between:

1) Cables and housings.
2) Right handle and handlebar.
3) Butterfly valve's pivot and bushings.

Bowden what? I'm sorry, that's too in-depth for understanding on the ADVrider forum... You will have to dumb it down more...


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Old 04-27-2014, 07:21 AM   #13
JohnCW
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Quote:
Originally Posted by Boon Booni View Post
My brother had the throttle stick open on his Ducati monster. The internal sheathing of his cable pulled out and wedged itself in the throttle mechanism. He was doing a track day at the time and got stuck at WFO. Bit of a pucker moment to pull the clutch and find the kill switch.

Bet he wished his duc was equipped with a pull to close cable.
You might have time to reach for a kill switch on the track and get away with just a big scare, but on the road with far more 'deadily' objects a stuck open throttle may have you in serious trouble way before our slow brains can figure what has happened and what do we need to do to deal with it.
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Old 04-28-2014, 10:38 AM   #14
toates89 OP
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I am currently running one cable for now.
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Old 04-28-2014, 11:13 AM   #15
markk53
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Quote:
Originally Posted by JohnCW View Post
You might have time to reach for a kill switch on the track and get away with just a big scare, but on the road with far more 'deadily' objects a stuck open throttle may have you in serious trouble way before our slow brains can figure what has happened and what do we need to do to deal with it.

Or get their gas pedal unstuck from the floor mat...
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