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K100-forum.com » Technical, repair and troubleshooting » Engine and transmission » throttle stays open

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1Back to top Go down   throttle stays open Empty throttle stays open Sat 16 Dec 2023 - 5:15

mmgee123

mmgee123
active member
active member
Hey all I couldn’t find a very fitting place to put this on the forum, but when i put throttle on it doesn’t snap back when i let it go, i have to close it back myself (and it’s not the grips i pulled the grip back and it was still staying open), any tips on what i should do? i ordered a new throttle housing and cable but i’m not sure if it’ll work or if there’s an easier fix? thanks!

    

2Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 5:45

Two Wheels Better

Two Wheels Better
Moderator
Moderator
So's we all know what K bike - presumably - you are having the trouble with, please state it each time, or easier, go to the Signature part of your Profile, and list it. Year & specific model is good.

What exactly do you mean by "put throttle on"? As in, when you turn it to actually rev the engine, or when you're attempting to install the twist grip assembly?

Is this a new issue, that's just arisen?

You need to be sure the throttle assembly isn't binding on the end of the handlebar or the 'bar end weight. This is often due to the switch assembly being tightened too far in from the end of the 'bar, or when heated grips are turned on for cold weather riding, when things, even rubber, can expand a bit.

Otherwise, check the cable end down at the throttle bodies. Is it coming to rest against the stop when the throttle is closed? Is the cable routed correctly? Is the bike a cafe racer or custom with other than stock components?


__________________________________________________
How we spend our days is, of course, how we spend our lives. - Annie Dillard, author - born 30 Apr 1945
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

3Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 9:27

mmgee123

mmgee123
active member
active member
Two Wheels Better wrote:So's we all know what K bike - presumably - you are having the trouble with, please state it each time, or easier, go to the Signature part of your Profile, and list it. Year & specific model is good.

What exactly do you mean by "put throttle on"? As in, when you turn it to actually rev the engine, or when you're attempting to install the twist grip assembly?

Is this a new issue, that's just arisen?

You need to be sure the throttle assembly isn't binding on the end of the handlebar or the 'bar end weight. This is often due to the switch assembly being tightened too far in from the end of the 'bar, or when heated grips are turned on for cold weather riding, when things, even rubber, can expand a bit.

Otherwise, check the cable end down at the throttle bodies. Is it coming to rest against the stop when the throttle is closed? Is the cable routed correctly? Is the bike a cafe racer or custom with other than stock components?
when i twist the throttle to rev the engine it stays stuck until i twist it back the other direction to close it and no i just bought the bike and it was like this

    

4Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 14:15

Two Wheels Better

Two Wheels Better
Moderator
Moderator
That's a bit of clarity, then, and my questions remain.


__________________________________________________
How we spend our days is, of course, how we spend our lives. - Annie Dillard, author - born 30 Apr 1945
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

5Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 14:40

Laitch

Laitch
Life time member
Life time member
Along with the checks TWB has suggested is this, compliments of Forum member duck. Caked up grease will slow the works.

    

6Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 15:21

firstle

firstle
Life time member
Life time member
take it apart and clean it inc the cable , they are not the most straight forwards with the bevel gear twist grip but they will work when in good order and routed correctly

    

7Back to top Go down   throttle stays open Empty Re: throttle stays open Sat 16 Dec 2023 - 17:57

TacKler

TacKler
Life time member
Life time member
Does it have a threaded throttle lock on the underside of the switch gear?  Should have a screwdriver slot in the head and an external spring.  Classic signs of one of those wound in.  

If so, then just wind it out.


__________________________________________________
Red 1991 K75S
    

8Back to top Go down   throttle stays open Empty Re: throttle stays open Sun 17 Dec 2023 - 1:12

Point-Seven-five

Point-Seven-five
Life time member
Life time member
TacKler wrote:Does it have a threaded throttle lock on the underside of the switch gear?  Should have a screwdriver slot in the head and an external spring.  Classic signs of one of those wound in.  

If so, then just wind it out.
+1


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

mmgee123

mmgee123
active member
active member
had an issue with the throttle getting stuck when twisted, opened it up and saw the grease was black i wiped it all out and sprayed some pb blaster to break up some rust, just wondering what kind of grease i should add in, and if there’s a specific way to put it in?

    

10Back to top Go down   throttle stays open Empty Re: throttle stays open Wed 3 Jan 2024 - 5:26

moriarti

moriarti
Life time member
Life time member
Time for a through clean. Some of us only use spray grease rather than packing it full of grease. Gives a nice light throttle response Very Happy Very Happy


__________________________________________________
1984 k100 rs red/black VIN  0004449 Now sold to Olaf
    

11Back to top Go down   throttle stays open Empty Re: throttle stays open Wed 3 Jan 2024 - 5:34

Point-Seven-five

Point-Seven-five
Life time member
Life time member
Make sure the end of the grip is not dragging on the handlebar because the throttle assembly and switches are pushed too far inward on the bar.  You should also make sure the inboard end of the grip isn't rubbing on the throttle housing as well. 

Last, your bike might have a throttle lock screw on the bottom of the throttle housing.  This is a knurled nob that presses on the throttle adding enough drag to prevent it from closing when you let go.


__________________________________________________
Present: 1991 K100RS "Moby Brick Too"
 
Past:
1994 K75RT "Ilsa, She Wolf of the SS"
1988 K100RS SE "Special Ed"
1994 K75S "Cheetos"
1992 K100RS "Moby Brick" R.I.P.
1982 Honda FT500
1979 Honda XR185
1977 Honda XL125
1974 Honda XL125
1972 OSSA Pioneer 250
1968 Kawasaki 175
    

12Back to top Go down   throttle stays open Empty Re: throttle stays open Wed 3 Jan 2024 - 6:14

MartinW

MartinW
Life time member
Life time member
I use spray on white lithium grease on the gears. And on the cables it's safe to use a PTFE lubricant like Tri Flo .
Regards Martin.


__________________________________________________
1992 K75s
    

13Back to top Go down   throttle stays open Empty Re: throttle stays open Wed 3 Jan 2024 - 7:47

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Essential question asked twice. Topics merged.


__________________________________________________
How we spend our days is, of course, how we spend our lives. - Annie Dillard, author - born 30 Apr 1945
1977 R75/7-100, '93 K11/K12 Big Block, '95 R100 Mystic, '96 K1100RS, '98 K1200RS, '06 K1200R & '09 K1300GT. Projects: 1993 & '96 K1100RS, & 1st '98 K1200RS.
The Mystic, Big Block, 2nd K1200RS, K12R & K13 are running & ridable.
    

14Back to top Go down   throttle stays open Empty Re: throttle stays open Wed 3 Jan 2024 - 9:29

Laitch

Laitch
Life time member
Life time member
Two Wheels Better wrote:Essential question asked twice. Topics merged.
throttle stays open 4D6qBnTpxAYVqF+dQB1KlNYXLNCbNAAaNHYQLICvNBVgdq15L1WXQuwqIKBuLNKzAgADs=


__________________________________________________
1995 K75 90,000 miles
    

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