2 Re: Throttled! Mon Oct 05, 2015 1:00 am
Rick G
admin
One thing I have had a couple of times was the flange on the rubber grip would be pushing against the switch block due to it riding up the throttle tube. I ended up gluing one of them but the other time just pulling it back along the tube till there was 2-3mm clearance solved the problem. Also on some assemblies there is a screw in throttle lock under and to the front of the housing. It's an aluminium screw with a head about 5c piece size.
Often it is just the grease is old and hard and it all needs cleaning, the cable should not be lubed as it has a teflon liner and will bind up over time if it is oiled.
Often it is just the grease is old and hard and it all needs cleaning, the cable should not be lubed as it has a teflon liner and will bind up over time if it is oiled.
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"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived." Dalai Lama
Bikes 1999 K1100 LT with a Big Block 1200
3 Re: Throttled! Mon Oct 05, 2015 1:13 am
Holister
Life time member
Also... when the cable gets old and worn it can bind and it'll be hard to wind it on as well. If after checking Rick's suggestions it's still slow to return, check the cable routing or replace the with a new cable.
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1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
4 Re: Throttled! Mon Oct 05, 2015 4:33 pm
Dai
Life time member
Check the crown and pinion teeth. They can spall and shed small chunks, then gall badly where the broken parts stick. Net result is that two or three teeth do not mesh correctly. These are the teeth that are in mesh when the throttle is holding approx 60mph/95kph. In my experience this can cause the throttle to both not open or close correctly from this point.
One of BMW's not-so-good ideas, I'm afraid, despite the longevity of the system across various models. I fitted a brand new pair after the original galled quite badly, then 15,000 miles later binned them as they were in the same state as the originals despite me looking after both the crown-and-pinion and the throttle cable.
One of BMW's not-so-good ideas, I'm afraid, despite the longevity of the system across various models. I fitted a brand new pair after the original galled quite badly, then 15,000 miles later binned them as they were in the same state as the originals despite me looking after both the crown-and-pinion and the throttle cable.
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1983 K100 naked upgraded to K100LT spec after spending time as an RS and an RT
1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
5 Re: Throttled! Mon Oct 05, 2015 7:46 pm
Holister
Life time member
Dale, what grease are you using?
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1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
6 Re: Throttled! Tue Oct 06, 2015 12:05 am
T3CHNO1D
active member
I have the same problem, I've traced it to the bar end weight rubbing on the grip. If I loosen the bar end, all good, tighten it, and it binds. I believe the grip had swollen over time and is now too long. Time to buy some new grips.
Without the chain and cam hooked up, does the cable return easily?
T3CNO1D
Without the chain and cam hooked up, does the cable return easily?
T3CNO1D
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Model Production Date/Serial Number
K100 1985 ???? / (F0030125)
7 Re: Throttled! Tue Oct 06, 2015 12:43 am
robmack
Life time member
Bar-end weight should be adjustable. It fastens to an expanding bolt. Just loosen the screw, tap to loosen the expander and adjust the bar-end to stop rubbing against the grip rubber.T3CHNO1D wrote:I have the same problem, I've traced it to the bar end weight rubbing on the grip.
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Robert
1987 K75 @k75retro.blogspot.ca
8 Re: Throttled! Tue Oct 06, 2015 4:38 am
rawdonball
Gold member
I fitted bar end weights to the k75c - I like the look - found that even moderate tightening expands the tube enough to make the throttle bind. It means that I don't need to bother with the throttle friction screw which I would otherwise be using on all longish rides
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'88 K100RT, '86 K75C, '05 Yamaha TTR250
9 Re: Throttled! Tue Oct 06, 2015 8:23 am
Holister
Life time member
My RT bars have the expanding bolt but the RS bars I've just installed have a threaded fixing inside which the bar-end weight bolts to. No adjustment. To stop it rubbing on the grip I just moved the switch block/throttle mechanism a few mm to the centre so I can screw the weight on firmly.
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1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
10 Re: Throttled! Wed Oct 07, 2015 12:32 pm
T3CHNO1D
active member
I've got the welded threads too, so I will try moving the switch block as well, isn't there a a pin that hold the switch block in place and from rotating?Kaptain Holister wrote:My RT bars have the expanding bolt but the RS bars I've just installed have a threaded fixing inside which the bar-end weight bolts to. No adjustment. To stop it rubbing on the grip I just moved the switch block/throttle mechanism a few mm to the centre so I can screw the weight on firmly.
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Model Production Date/Serial Number
K100 1985 ???? / (F0030125)
11 Re: Throttled! Thu Oct 08, 2015 6:59 am
DaleRT
Silver member
Thanks all for the areas to investigate.
At the present the Handlebars are disconnected from the steering-head as i'm replacing the bearings,
checking out the front fork stanchions & the front discs need replacing.
"Grease" is there a specific grease to use?
At the present the Handlebars are disconnected from the steering-head as i'm replacing the bearings,
checking out the front fork stanchions & the front discs need replacing.
"Grease" is there a specific grease to use?
12 Re: Throttled! Thu Oct 08, 2015 8:47 am
Holister
Life time member
Just the 4mm socket head from the front side (back of the switch block)T3CHNO1D wrote:I've got the welded threads too, so I will try moving the switch block as well, isn't there a a pin that hold the switch block in place and from rotating?
I just use Penrite Molygrease EP for everything except splinesDaleRT wrote:Thanks all for the areas to investigate.
At the present the Handlebars are disconnected from the steering-head as i'm replacing the bearings,
checking out the front fork stanchions & the front discs need replacing.
"Grease" is there a specific grease to use?
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1989 K100RT VIN 0097367 (naked) 1996 K1100RS VIN 0451808 | Fuel: 95 Octane Engine Oil: Nulon Full Synthetic 15W50 Gear Box Oil: Nulon Synthetic 75W90 |
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