Sticky Throttle Cable

[Warbucks]

Just a quick question if I may? Is it possible to replace the lower section of the throttle cable for the right hand side, or do I have to replace both sides and the upper section as well.

I'm assuming that the upper section is ok because the left cable is working properly. The right cable is not.

[Bob_Roller]

You can replace  the cable by itself, you just need to go into the cable splitter to do it .

Just curious, how did you determine that this cable was the problem ??

[Warbucks]

I fired the engine up for the first time in about 10 years. When I gave it full throttle to get some fuel into the carburettors I noticed that the right side carb was jammed at full and would not return. So I lifted the cable out of the top of the carb without disconnecting it and reinserted the cable in its seat. The throttle then returned to idle. The other side works good so I can assume that the upper and left lower cables are ok.

I don't think it's the carb jamming because the throttle lever moves freely with the tension off the cable. I have noted that at first it didn't matter how much throttle was applied. It was jamming with only a bit of throttle on. After using the throttle for about 30 minutes it will now return from about 2500 RPM. If I take it to 3000 RPM it will jam again. Maybe the cable might free up a bit with use. As mentioned, she's been asleep for about 10 years.

I think an OEM lower cable is only about $40.00 AUD.

[Warbucks]

Update! I have diagnosed this problem correctly. I disconnected the upper throttle cable and unscrewed the splitter. The right side cable has a broken strand of wire, which would account for the cable sticking.

Now for my next question. How do you get the lower cable out of the splitter? I screwed the adjustment on the top of the splitter all the way in and it revealed the plastic part that holds the lower cable in place. Unfortunately I cannot figure out how to pull the plastic part far enough out of the splitter to remove the top end of the lower throttle cable.

What is the trick?

[Bob_Roller]

I would suggest removing the cable from the control on the handlebar, may give you more slack in the upper cable .

I have had issues with '82 and later R65's, my LS's .

On my '81 R65, you need to push the upper cable down in the splitter plug, move it to the side and it should come free .

If this doesn't work and you have an '82 or later bike, you may need to use a very thin file and ' open ' up the slot on the splitter plug, for the cable you want to remove, the swaged cable end needs to be pushed up from the bottom side of the splitter body to do this then pulled out the side of the ' plug ' that the cables rest in .

You only have to open up the very top of the slot to get the cable out .

Hope this made sense to you !!!! .

[Warbucks]

Thanks for the clue Bob. The bike is a 1985 model. One of the last twin shock models before they built the R65 with a mono shock. I recall reading somewhere that the mono shock model is an R80 frame with the 650 engine installed.

The guy who devised that splitter is diabolical. LOL

I got it out eventually without filing anything at all. I reckon if some of the guys here got together and re-designed it they could easily come up with something which is a lot easier to dismantle.

Now I have to wait another 3 weeks for the new cable. So close but yet so far.

[Tony Smith]

I reckon if some of the guys here got together and re-designed it they could easily come up with something which is a lot easier to dismantle.

No need, A new 'cap' for the throttle gear on the handlebar, a new throttle gear and run two throttle cables like God and common sense meant you to.

only BMW could introduce a third cable and a splitter box and call it progress.

That said, I bought all the bibs and bob to do that to mine and then discovered that one of the VERY few smart things the MPO (moronic previous owner) had done was fit a very nice set of Teflon coated stainless steel throttle cables.  They can stay there until something breaks.