2 Re: Clutch question Sun Nov 10, 2024 3:53 pm
Dai
Life time member
That is so rare I've never seen it before. My guess is that the clutch splines have never been greased since the bike was new. How old is the bike and how many miles has it done? What does the gearbox input shaft look like?
__________________________________________________
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
3 Re: Clutch question Sun Nov 10, 2024 4:03 pm
Didir18
New member
Bike is 1984, very likely they have never been greased and should be around 80.000 miles. The gearbox input shaft is in perfect condition.
Strange in any case. In one Youtube they talked about a similar case with no root cause ...
Strange in any case. In one Youtube they talked about a similar case with no root cause ...
4 Re: Clutch question Sun Nov 10, 2024 4:43 pm
jbt
Life time member
I've seen this many times.
More often on airheads, but sometimes on K, specially K11 with more torque.
And sometimes on clutches with a brand new disc recently fitted!
With or without grease applied.
I've been told that there was a batch of defect discs with a wrong treatment on the teeth...possible. The BMW technical expert told me that on bikes with high mileage, the input shaft should be replaced by a new one if it had worn marks, because a new disc would not be a perfect fit on old teeth.
But I suppose that the main reason is the fatigue of the part, and the kindess of the pilot!
More often on airheads, but sometimes on K, specially K11 with more torque.
And sometimes on clutches with a brand new disc recently fitted!
With or without grease applied.
I've been told that there was a batch of defect discs with a wrong treatment on the teeth...possible. The BMW technical expert told me that on bikes with high mileage, the input shaft should be replaced by a new one if it had worn marks, because a new disc would not be a perfect fit on old teeth.
But I suppose that the main reason is the fatigue of the part, and the kindess of the pilot!
__________________________________________________
Let us enjoy the transient delight
That fills our fairest day.
5 Re: Clutch question Sun Nov 10, 2024 7:20 pm
Laitch
Life time member
Somebody should cross reference the dates of these failures with the dates of crop circles appearing in the vicinity to see if there is any correlation.Didir18 wrote:Strange in any case. In one Youtube they talked about a similar case with no root cause ...
__________________________________________________
1995 K75 90,000 miles
6 Re: Clutch question Sun Nov 10, 2024 10:22 pm
Rick G
admin
I have seen that quite a few times, one bike in particular was in the habit of doing it about every two years with no known cause.
__________________________________________________
"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
7 Re: Clutch question Mon Nov 11, 2024 3:38 pm
Two Wheels Better
Moderator
I've moved this thread from Troubleshooting - General to the more specific Troubleshooting - Engine & Transmission.
Nothing to see here, move along, these are not the droids you are looking for.
Nothing to see here, move along, these are not the droids you are looking for.
__________________________________________________
The forest was shrinking, but the trees kept voting for the axe, for the axe was clever, and convinced the trees that because his handle was made of wood, he was one of them. -Turkish proverb
1977 R75/7-100, '93 K11/K12 Big Block, '93 K1100RS, '95 R100 Mystic, '96 K1100RS, 2 x '98 K1200RS, '06 K1200R & '09 K1300GT
8 Re: Clutch question Mon Nov 11, 2024 9:36 pm
duck
Life time member
I had them strip on a K75RT many moons ago. When mine went they also trashed the transmission input splines.
__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
9 Re: Clutch question Sun Nov 17, 2024 9:24 am
dbier
active member
Hoping this never happens to me - but am now curious how this issue is resolved... Are new replacement parts still available (if so, where)? Or, are used parts the only option? Also curious about cost of repair (ballpark idea).
10 Re: Clutch question Sun Nov 17, 2024 10:40 am
Dai
Life time member
Yep - new friction plates are available. No idea what the cost is in the US, but over here they're just short of £100.
__________________________________________________
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
11 Re: Clutch question Sun Nov 17, 2024 1:44 pm
jbt
Life time member
I strongly recommand to change the whole clutch, friction plates and covers.dbier wrote:Hoping this never happens to me - but am now curious how this issue is resolved... Are new replacement parts still available (if so, where)? Or, are used parts the only option? Also curious about cost of repair (ballpark idea).
It's not an easy job to change it as it requires to remove the whole transmission. Do you want to do it one or two times?
Most, or all of the clutch covers are worn also when the disc is worn. It's more subtle but they are not plane anymore and are conical.
See the space under the ruler?
All the clutches I have inspected were showing this kind of wear: the one on these photo had only 20000km! It's a mechanical nonsens to put only a new disc on this.
So, the disc alone is about 100$, the whole Sachs clutch kit about 350$. Consider 8 to 10 hours of work depending of versions and options.
I also recommend to use an oilproof disc made by EBR, a bit more expensive but who can cope with the oil leak taht will occur one day, so you can delay the repair as long as you tolerate the oil dripping under the bike.
And I always check at the same time the flywheel gasket for leaks, that implies an extra cost to change the o ring and the nut on the shaft. Most of the time, the gasket is out of order.
__________________________________________________
Let us enjoy the transient delight
That fills our fairest day.
Similar topics
Permissions in this forum:
You cannot reply to topics in this forum