KZR's Bikes of the Month for 2024

Push and Pull Cables

More
02 Jun 2022 05:43 #868025 by Lebowski
Push and Pull Cables was created by Lebowski
Couple questions for the KZ gurus.

1. This may be a difficult question to answer, but  about how much force should I expect to need to pull the throttle forward. I'll be honest, I have not ridden a bike in a long time and my KZ900 project has been a slow 5 years with house projects taking priority. I installed the push/pull cables yesterday, and it seems like it take a decent amount of force to lift those four carbs fully open.

2. How much slack should be on the push cable when the throttle is fully closed? I'm not following the clymer manual that well. I am using a stock cable, but it seems too long.
3. Does the push cable simply allow me to pull the carbs closed rather than relying on the return spring?
4. How quickly should my throttle snap back? 

Thanks

Please Log in or Create an account to join the conversation.

  • kzstreetfighter71
  • Offline
  • User
  • Atlantic West Coast
More
02 Jun 2022 05:56 - 02 Jun 2022 05:58 #868026 by kzstreetfighter71
Replied by kzstreetfighter71 on topic Push and Pull Cables
Are the cables new? are they running smooth? can you open the carbs at the wheel control pully with your thumb? Tension on the cables should be a touch slack, not super tight.

06 Gsf 1200 bandit, 08 Triumph tiger 1010
05 Yam xv1700 , 02 Hon shadow 1100
1975 Z1 (currently working on)
1977 Z1000 ( running and in storage)
1978 Z1000 (currently working on)
1978 Z1r "skinny tank" (currently working on)
1978 Z1r "fat tank (gathering parts)
1979 z1000st (currently working on)
Last edit: 02 Jun 2022 05:58 by kzstreetfighter71.

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 07:08 #868030 by Mikaw
Replied by Mikaw on topic Push and Pull Cables
Your not getting much mechanical advantage with the twist grip so with the cables off, lift the throttle cable pulley and feel for smooth full flange operation. If you feel any sticking or it feels sluggish you will need to clean the carbs. To install the cables follow the included

 

 

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 07:20 #868033 by Lebowski
Replied by Lebowski on topic Push and Pull Cables
The cables were lubed with the motionpro cable lube. The cables move with ease before I hook them to the carbs. The carb itself is squeeky clean, and I can lift it up with my thumb. It looks like I installed it correctly, except I have too much slack on the push cable according to what you guys have told me. 

Please Log in or Create an account to join the conversation.

  • kzstreetfighter71
  • Offline
  • User
  • Atlantic West Coast
More
02 Jun 2022 07:28 #868034 by kzstreetfighter71
Replied by kzstreetfighter71 on topic Push and Pull Cables
One other thing and im sure its not the issue is that the hand throttle assembly is moving freely and is not upside down, the cables ends should be on the top side, excuse me if that is day one thing to say but.. it happens.

06 Gsf 1200 bandit, 08 Triumph tiger 1010
05 Yam xv1700 , 02 Hon shadow 1100
1975 Z1 (currently working on)
1977 Z1000 ( running and in storage)
1978 Z1000 (currently working on)
1978 Z1r "skinny tank" (currently working on)
1978 Z1r "fat tank (gathering parts)
1979 z1000st (currently working on)

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 07:32 - 02 Jun 2022 07:35 #868036 by Warren3200gt
Replied by Warren3200gt on topic Push and Pull Cables
Throttle tension is directly controlled by the return spring. The stronger the spring the harder it is to open the throttle. 
Do you have the correct return spring fitted? 
I've seen many carbs with the incorrect spring fitted where someone has broken or lost the correct one and just replaced it with whatever was to hand.
Also ensure twist grip is well greased on the bars and inside the chamber in the switch gear. 


Z1000J2 somewhat modified!

Last edit: 02 Jun 2022 07:35 by Warren3200gt.
The following user(s) said Thank You: Mikaw

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 07:50 - 02 Jun 2022 07:51 #868038 by Mikaw
Replied by Mikaw on topic Push and Pull Cables
Sorry just read what I included. Here is the adjustment page 16.



 

1976 KZ 900 A4 kzrider.com/forum/11-projects/613548-1976-kz-900-a4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
1980 KZ 750 E1
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.
Last edit: 02 Jun 2022 07:51 by Mikaw.

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 10:57 #868052 by Lebowski
Replied by Lebowski on topic Push and Pull Cables
The cable ends are on the top side. I did not grease the inside of the housing, so I will give that a check. I also don't know if it's the correct spring. I'd be surprised if it isn't, but it's worth a check. 

Please Log in or Create an account to join the conversation.

  • hugo
  • Offline
  • Sustaining Member
  • '92 Zephyr 750
More
02 Jun 2022 14:37 - 02 Jun 2022 14:39 #868064 by hugo
Replied by hugo on topic Push and Pull Cables
There should not be any more force required than only one single cable.    The pull-push is only a 'safety' feature (cars with carbs never had one).    

The theory is if the spring return breaks, then you have a 'safe' mean to close the throttle.   It should work just fine with only the pull cable as you know it.

......it is up to you to figure what the odds of the return spring breaking are.   I guess they figured the legal liability was higher on a motorcycle than a car. 
Last edit: 02 Jun 2022 14:39 by hugo.

Please Log in or Create an account to join the conversation.

More
02 Jun 2022 17:34 #868082 by Kidkawie
Replied by Kidkawie on topic Push and Pull Cables
Make sure there"s clearance between the end of the bar and the inside if the grip.

To adjust, loosen both cables, adjust the pull cable so you have slight freeplay, then tighten the push cable just until the throttle feel gets a little slower and back it off a turn or two.

1975 Z1 900
1994 KX250 Supermoto
2004 KX125
The following user(s) said Thank You: slayer61

Please Log in or Create an account to join the conversation.

  • howardhb
  • Offline
  • Sustaining Member
  • God, I trust
More
03 Jun 2022 07:56 #868125 by howardhb
Replied by howardhb on topic Push and Pull Cables
Lets be clear here... both cables are designed to "pull".  "pushing" is not the modus intended. Set the "free play" between open/close cables at about 3mm (1/8in).

H.

'81 GPz 550 D1
'81 GPz 1100 B1 ELR "Tribute" www.kzrider.com/11-projects/617040-1981-...-rstomod-elr-tribute
'82 Yamaha YB100 Fizzie
'79 Suzuki GT200 X5 TWO STROKE TWIN - SMOKER!
The following user(s) said Thank You: slayer61

Please Log in or Create an account to join the conversation.

More
03 Jun 2022 20:51 #868177 by RonKZ650
Replied by RonKZ650 on topic Push and Pull Cables
The push/pull concept seems simple enough and should not be hard to get to work, but trust me, if you have stock bars it is relatively easy, if you have low bars, no amount of adjustment will ever result in smooth operation. Running low bars for 200,000+ miles, one of the best things I ever did was get rid of the stupid push cable and just use the one pull cable. 

321,000 miles on KZ's that I can remember. Not going to see any more.

Please Log in or Create an account to join the conversation.

Powered by Kunena Forum

If you like KZR Please consider making a donation. Thank you.

KZRider is free, but not without cost.

Please consider chipping in a few bucks to help cover the cost of running the KZR servers.