Clutch Slips: Help Repair Manual BMW F650 & ST
Repair instructions when the clutch of your BMW F650 + ST slips
F650 Funduro + Strada models
|Year of Manufacture||
Here you can find out what it can be, if the clutch of your motorcycle slips and how you can repair it quickly and easily with which spare parts:
If the engine starts to howl and gets torque but no power comes, the problem is usually that the clutch will not work anymore. This can have different causes:
The clutch cables between the clutch lever and the release lever are not sufficiently tensioned
The clutch plates are worn
The clutch springs no longer bring the necessary tension.
Below we explain how to repair your clutch yourself. This article will be written gradually and refined with details.
2.1. If the clutch cable is the problem:
If the clutch cable is the problem, you can usually adjust with the adjustment options on the recording of the clutch handle the train back to the perfect coupling point. This is done by turning the dial on the mount until the coupling has a clearance of approx. 1-2 mm and then starts to couple. This requires a little tact. However, if the train is damaged or torn, it must be replaced. A fall can also cause the handle to distort as it picks up so it needs to be replaced.
All spare parts can be found used and new in our online shop.
2.2 When the clutch plates are worn:
The most common cause is when the clutch slips, the clutch plates are worn. These rub down minimally over time, until the spring tension is no longer sufficient to exert enough pressure on the slats, so that they grip firmly and transmit the power.
Then the slats of the coupling must be replaced. Usually a replacement of the springs also makes sense, as they can also wear out. Then you do not want to do the same work again for a few 1000km, this time swapping the springs.
2.2.1 Step 1: Order Spare Parts
You need a set of new clutch plates. Also a set of springs is recommended. In addition, a new paper seal for the clutch cover is needed to re-seal the engine at the end.
2.2.2 step 2: repair
There are 2 procedures to repair the clutch. The LEFT lid must be fixed! If the next oil change is imminent, that's no problem. Simply use our detailed instructions to drain the engine oil.
But if the last oil change has just happened, it can be easier to put the bike on its side, so that the oil runs on the other side of the engine and you can do the work skillfully from the top, without having to remove the engine, or to screw on the side of the motorcycle. The oil simply remains in the engine, saving resources, time and money.
However, the following steps are important and must be observed:
1. Remove right mirror or at least release and fold in.
2. If necessary, dismantle the front of the cockpit / front panel to make sure that nothing happens.
3. Laying blankets and cushions whereupon your F650 can then be carefully deposited (preferably at least to 2.). Note: The driver will turn to the right because of the load distribution. This should not be prevented to achieve a stable lie.
4. Turn fuel cock to OFF !!! Furthermore, now the remaining fuel from the float chambers of the carburetor should now be drained, since the gasoline otherwise runs out while lying down.
5. If the motorcycle is now on the right side and you have all the spare parts ready, you can start with the actual screwdriver work. : D
These steps can be skipped if the oil is to be changed anyway and the oil is already drained.
6. All Allen screws of the LEFT! Release clutch cover and unscrew. It is best to choose a starting point and place the screws in series.
7. Loosen the lid with a rubber mallet or a piece of wood between the lid and a normal hammer with light strokes and then pull off with a little force if necessary. For this purpose, a tool can be attached to the retaining lugs of the lid carefully when the lid is firmly seated.
Now the coupling is free with sight on the clutch basket:
8. Remove the remains of the seal between the engine hull and the cover for later clean assembly to ensure absolute tightness. Do not damage the sealing surfaces!
9. Unscrew the 10 nut screws (at least in the beginning, better not use a cross-slotted screwdriver, although this is also possible):
The screws hold the springs that you should also replace if necessary:
Remove the cover of the clutch basket and inspect the inner release lever and bearing therein for damage. That's what it must look like if everything is okay:
10. Now the clutch plates are free in front of you in the clutch basket. Take these out. Pay attention to how these are sorted. There is always a coated slat followed by a bare steel slat, etc.
Below is a bare area, which is secured on some models with a wire. This remains installed. The wire is delicate and should not be damaged with a tip object when removing the remaining clutch plates.
11. Now replace the worn with the new fins. The order always alternating is extremely important!
12. Put everything together in reverse order and tighten the 6-Kant bolts with your torque wrench.
These bolts get a torque of: (Currently Unknown) NM
13. Put on the new paper seal and make sure that the sealing surfaces are clean. Also pay attention to the paper seal, this can easily tear if the lid gets stuck somewhere. Then she is down and it has to be a new one. With feeling should be worked so here.
14. Mount the cover with its coupling shaft inside. Make sure everything fits each other well. Tighten the screws of the cover with your torque wrench evenly crosswise (always opposite). These screws of the lid get only 12NM. Yes, that's not very much, but it's true because the engine expands at operating temperature.
15. Reinstall the release lever on the shaft of the cover and set it in place.
15. Put the bike on and start the engine. Make sure everything is tight and that there is no oil leaking anywhere on the lid.
Congratulations. Your clutch is repaired and ready for use again. Carefully start a small practice round before the next big ride.
If you have questions, suggestions or feedback, please write us an email to the address below in the footer.
The team of GlobalMotoParts wishes you a good trip at all times.Author: Paul Reimann
* This description is a guide based on personal experience. There is no liability.