R75/6 carbs vs /7

[Andey]

Not ha ha funny either, LOL.

If you get the chance on Y tube see if you can find the documentary I am writing about, it is really quite something to watch.
St.

Will look out for it...

I remember a video which was shot in 1976 at the BMW Berlin factory assembling /6s... definitely an eye opener and great to see the folks that put it together...

[Andey]

Ah found it...

http://www.ina.fr/video/CAA93053907

It’s also on Facebook somewhere

[Andey]

This is also a particularly good video of the insides of a /6

https://www.facebook.com/groups/9115219 ... 16?sfns=mo

From the sounds of things, probably needs a little oil

[srankin]

Nice links, thanks for sharing. St.

[Andey]

So managed to get the bike together for a test ride...

Overall positive, clutch feels a lot committed with the gear shifting... I feel like before it didn’t fully disengage and relied on the spinning forces to free the plates...

Had some jumpy shifts... but I feel like it needs time to for the plates to match up... would that be the case? Kinda like new brake pads?

[schrader7032]

I suppose that the jumpy nature could be due to the non-smooth surfaces of the clutch. It could also be that the lubrication of the transmission input splines was not thorough enough.

[srankin]

Not to be a pain but when you reinstalled the transmission, did you remember to apply lubricant to the input shaft gear?

Lack of lube on this input shaft can cause screwy clutch action.

I know, it is all together and I am a jerk for saying something now, LOL, sorry, hindsight is 20/20.

Also, double check your cable adjustment as well as the clutch arm adjustment. Some fine tuning might help. St.

[Andey]

I suppose that the jumpy nature could be due to the non-smooth surfaces of the clutch. It could also be that the lubrication of the transmission input splines was not thorough enough.

I hope it’s the rough surfaces... the pressure plate and clutch plate were worn but serviceable...

Ted porters spline lube to the rescue...! I used toothbrush amounts on the splines and clutch friction plate where it matches...

[Andey]

Not to be a pain but when you reinstalled the transmission, did you remember to apply lubricant to the input shaft gear?

Lack of lube on this input shaft can cause screwy clutch action.

I know, it is all together and I am a jerk for saying something now, LOL, sorry, hindsight is 20/20.

Also, double check your cable adjustment as well as the clutch arm adjustment. Some fine tuning might help. St.

Used spline lube on the input shaft and friction plate... followed boxer2valves method of prepping and installation...

Adjusted the clutch cable before, realised how important it was having a properly adjusted cable was early on when I first got the bike... it’s like night and day, between a rideable bike and something completely wrong...

The previous owner had the actuation arm bolt threaded all the way through and the arm was touching the frame when the clutch was engaged and had actually wore away at the arm... surprisingly it was still rideable... but adjusting it properly to the 202mm from the transmission to the cable ball with 2mm free play at the arm, made it feel like another bike...

[schrader7032]

Just to be sure, the lube should only go on the transmission splines. That way when the trans is pushed into place, the excess gets pushed to the rear. If lube is put on the clutch splines, excess could be pushed forward and onto the clutch surfaces.