It appears there are two ways to restrict a f650 single. The official BMW way using BMW parts and there is also an aftermarket throttle stop available. This guide is using the BMW parts. One caveat is the throttle body must have the bigger cam with two positions for the throttle cable. I understand all UK bikes have this but it yours doesn't then the aftermarket throttle stop may be the way to go.
As far as I can see the process should be the same for all F650 singles although the part number for the cable guide looks to be different in twin spark models
For the 2002 bike we have we used part number 13547653277 (BRACKET FOR ACCELERATOR BOWDEN CABLE 25KW) Cost was four pounds something.
First thing is to remove the left hand indicator and tank panels.
We also swung the oil tank out the way as it gave a little more access and made taking photos that little easier.
Once the throttle body is exposed you should see something like this.
The bits we are interested in is the metal clamp that holds the outer of the throttle cable and the black cam that has two locations for the end of the throttle cable.
The photo above shows the full power configuration.
Turn the cam by hand (not using the throttle) and this will give you enough slack in the cable to remove the nipple from the cam. Next remove the two security torx bits (normal torx bits wont work due to a “pip” in the middle of the fastener) and swing the cable and guide out the way.
Attach the new guide and refit using the same torx bolts. Re attach the throttle to the other hole in the cam and ensure you still have the required slack in the throttle cable to allow the throttle to return fully home and you are done.
The photo above shows an additional throttle stop on the new bracket that limits the throttle opening even more than the cam does alone so you really need to change the bracket as well as moving the cable.
The photo below shows the new full throttle. I’ll get it on the GS911 and see exactly what percentage of throttle he has lost soon.
Refit the oil tank if you removed it and the rest is, as the Haynes manuals say’ the reverse of disassembly.
As far as I can see the process should be the same for all F650 singles although the part number for the cable guide looks to be different in twin spark models
For the 2002 bike we have we used part number 13547653277 (BRACKET FOR ACCELERATOR BOWDEN CABLE 25KW) Cost was four pounds something.
First thing is to remove the left hand indicator and tank panels.
We also swung the oil tank out the way as it gave a little more access and made taking photos that little easier.
Once the throttle body is exposed you should see something like this.
The bits we are interested in is the metal clamp that holds the outer of the throttle cable and the black cam that has two locations for the end of the throttle cable.
The photo above shows the full power configuration.
Turn the cam by hand (not using the throttle) and this will give you enough slack in the cable to remove the nipple from the cam. Next remove the two security torx bits (normal torx bits wont work due to a “pip” in the middle of the fastener) and swing the cable and guide out the way.
Attach the new guide and refit using the same torx bolts. Re attach the throttle to the other hole in the cam and ensure you still have the required slack in the throttle cable to allow the throttle to return fully home and you are done.
The photo above shows an additional throttle stop on the new bracket that limits the throttle opening even more than the cam does alone so you really need to change the bracket as well as moving the cable.
The photo below shows the new full throttle. I’ll get it on the GS911 and see exactly what percentage of throttle he has lost soon.
Refit the oil tank if you removed it and the rest is, as the Haynes manuals say’ the reverse of disassembly.