Gearbox out and apart

[Cameron]

Excellent, Excellent...Clear and informative.
The video of common fixes would be fantastic, give it a thought, for all us "semi" competant mechanics.

My gearbox, with 225,000kms on it lost 2nd and 5th one month into my RTW on (Porlock)sp? hill in Devon, Queens jubilee weekend. Some ass pulled out in front of me then stalled ...trying to get the fully loaded bike with two up going again on that slippery hill proved to much.
Sherlocks did a replacement box in a rush and after 75,000kms still going strong.
I had thought about having a go at fixing it myself but lacked the puller and jig, I'm glad I didn't...

 

[Frank Warner]

sounds like a plan.

i've done ducati's in the past by assembling & then measuring shaft float with a vernier or dial guage.

I've seen clutch plates made out of thick cow hide. Good to get you to civilization.

 

[B Murr]

Just a thought Steptoe.
How about doing a video.



I guess the video idea is not of much interest then Mr Steptoe ?

 

[Steptoe]

it's trying to earn a living that gets in the way -

can only post pics of whatever job is in at the time ?

Got an oilhead 1100 gearbox to rebuild soon , can post some pics on that

 

[Deleted account 220427002]

it's trying to earn a living that gets in the way -

can only post pics of whatever job is in at the time ?

Got an oilhead 1100 gearbox to rebuild soon , can post some pics on that

tell me that now!!!

 

[B Murr]

it's trying to earn a living that gets in the way -



Yeah I know what you mean. I've plenty on the list of things I would like to do. Work and having two very young kids gets in the way , but hey I wouldn't want it any other way regards the kids. Regards work I too would like to tell the boss to go and fcuk himself.

 

[Steptoe]

tell me that now!!!

it's a fecked box, the one i told you about with the broken case.

 

[(RIP) Bin Ridin]

When you get the clearance, what shims do you fit - exact size or preloaded...?

 

[Steptoe]

what shims do you fit - exact size or preloaded...?

what the hell is a pre-loaded shim ????

 

[(RIP) Bin Ridin]

Bad grammar....

After you have measured the clearance using the jig, how do you calculate the shims required?

 

[Steptoe]

Bad grammar....

After you have measured the clearance using the jig, how do you calculate the shims required?

You've just said it ! . What is this, wind-up time -


you take all the measurements and it gives you the gap that you need to shim on each shaft.

 

[(RIP) Bin Ridin]

OK, it is clear - no preload and no endfloat!

Look fwd to pics of 1100 box.

 

[Steptoe]

End float yes - 0.040 mm

 

[JAY]

Great pics Neil - just looking at my box minus 3rd gear at moment
(MOY *V by the way!) and contemplating getting it open. Just how hard is it to get the flange off? Your tool looks pretty hefty!!!!!

 

[Steptoe]

(MOY *V by the way!)

one of my old bikes -----

hows it going , it used to have huge tank slappers every now and again

 

[JAY]

Knackered gearbox, knackered valve guides and someone rebored it at some stage in its life! it'll live again!!

 

[Benjamin M]

My G/S got stuck in gear today, and from reading the various threads and having a look over the bike with someome else, it would seem that the spring in mine has broken as well.

There are no knocks in the box, everything really seemed to be fine up until the point that I couldn't change down.

I had to coast home in third gear, which was fun.

Got home and drained the oil, which was lovely and clean. Everything around the foot lever nice and tight. Clutch operating system seems to be fine as well, just as it was before really.

So being that I don't have the specialist BMW tools specific to the gearbox, I just wonder how feasible it is to replace it myself?

I'm just wondering if it wouldn't make more sense to buy a recon box from Motorworks for a 350 sheet exchange? Bit worried that I could buy the required tools and measuring equipment, and replace the spring to find that something else in there is knackered.. I'm pretty sure that they wouldn't accept a stripped box in exchange either.


Benjamin

 

[Rob Farmer]

Benjamin,

The spring is a few quid. If your box is ok apart from that I'd take the opportunity to get it all checked out and a new spring fitted rather than chancing another gearbox. If you haven't got the tools I'd pay to get it done properly, send the grumpy git Steptoe a PM he's in London I'm sure he'll sort you out

 

[Steptoe]

I'm just wondering if it wouldn't make more sense to buy a recon box from Motorworks for a 350 sheet exchange?

The spring costs 60 pence, plus the cover gasket and seal. No need to reshim it, just keep the shims fitted on the shafts at the moment.

 

[Benjamin M]

Thanks for the advice.

Steptoe, you have a PM