Oh no, Clutch Slip

[rudiemoto]

Ok, the bike was taken for a proper test ride. The feedback was that the symptoms points towards the clutch slave cylinder. Dipping the clutch and then accelerating briskly in 4th gear causes the clutch to slip, yes the lever was fully released. So, thinking about it, fluid leaks past the slave cylinder making the return of the piston slower hence the clutch slip. Just after that the bike was accelerated without dipping the clutch and clutch slip. So we'll see what BMW makes of it under good will as the dealer has ordered the parts and work will be done next week.

The slave will not be at fault ,but remove the starter motor and check for oil
The clutch uses a pressure plate which the push rod can wear which make u thinks its the slave .
But I can be wrong

 

[tanneman]

The slave will not be at fault ,but remove the starter motor and check for oil
The clutch uses a pressure plate which the push rod can wear which make u thinks its the slave .
But I can be wrong

No oil in the clutch housing. We'll see what's at fault when they split it. I see on the schematic that there is a felt washer to keep the pushrod clean and fluid out of the clutch housing. I would like to see the bike when they spilt it.

 

[tanneman]

Yesterday I've been to Wollaston to have a look at the bike while in 2 pieces. I was wrong about the felt washer as that goes around the gearbox input shaft. First time I've seen a BMW split in half. We had a look at it and I trust the BMW tech did the job properly. New clutch slave cylinder, clutch plate and pressure plate fitted. They will take it for a test ride tomorrow and then we'll know if the problem was fixed. Had an interesting talk with Steve while I was there in the workshop about BMW and bikes in general. Top guy and many thanks to BMW for their goodwill. I'll have to pay 50% labour and the rest is covered by BMW.

Just a remark on splitting the bike. Before the bike went to BMW I had a read in the manual and it goes through quite a few steps like taking the shaft drive off and the frame separately. I've always thought that the rear frame and shaft drive assy could come off in one go like they did at BMW. The workshop is clean and neat just as I like it. I'll have to invest in a bike lift and a few more tools like bigger torx bits if I'm going to take on a job like that. Overall I'm happy and just waiting for what happens on the test ride.

 

[tanneman]

Ok, bike is sorted, I paid my share and they delivered the bike all clean and shiny . I've got 2 years warranty on the parts so I'm happy.