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Author Topic: MK1 1200 Gearbox issues  (Read 657 times)
Pukapie
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« on: January 31, 2014, 11:06:28 AM »

Bit fed up now, because after pumping loads of cash into the bike its suddenly playing up.

The problems started one day out of the blue.  Essential some gear changes feel notchy and sometimes you click up to select a gear and find your still in the lower gear when you release the clutch. Going down the gears is fine, it just changing up. Obviously its the changing up to find you didn't select the next gear which is scary/annoying/worrying. I have done and oil and filter change, rebuilt gear linkage and set the slack in the chain & lubed it and it still happens. It also does not happen all the time, some rides it wont even do it....other times it does it all the time. The clutch does not drag in gear and neutral is easy to find.

I am stumped  Cry
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fatblokeonbnadit
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« Reply #1 on: January 31, 2014, 11:21:21 AM »

sounds like the return spring is weak/broken/come adrift,   dontknow dontknow icon_thumright
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Pukapie
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« Reply #2 on: January 31, 2014, 11:25:50 AM »

Cheers mate, is it normal for it to be an intermittent fault?
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fatblokeonbnadit
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« Reply #3 on: January 31, 2014, 11:27:27 AM »

not really, is the gear change lever free, take it off and make sure nothing is sticking or catching  dontknow dontknow
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Pukapie
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« Reply #4 on: January 31, 2014, 11:29:14 AM »

I will take it all apart, inspect and re-lube and keep me fingers crossed  Undecided

Cheers for the advice mate  icon_thumright
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Reaper-Dan
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« Reply #5 on: January 31, 2014, 13:16:09 PM »

sounds like the return spring is weak/broken/come adrift,   dontknow dontknow icon_thumright

i have a similar issue, im having to tap the lever up/down respectively in order to change again to the next gear, where is the return pring located (maybe a silly question lol)
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Pukapie
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« Reply #6 on: January 31, 2014, 14:01:19 PM »

Think it is behind the clutch basket mate icon_thumright


THINK i may have solved mine. I took the linkage off the pedal was fairly stiff on its bush. I had had a new bush machined for it out of some phossybronze and it was done to a very precise fit. So seems after a bit of use and getting gunked up it got stiff. For now just cleaned it out with GT85 and lubed with some chain wax. Seems buttery smooth by hand now.....Well see how she rides on my 40 mile trip home tonight.
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fatblokeonbnadit
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« Reply #7 on: January 31, 2014, 14:09:54 PM »

it is behind the clutch.....

if yuor gear lever has had a clout it can move in and the spring become dislodged from the indent icon_thumright

good job fixing yours, simplest is best Wave
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Reaper-Dan
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« Reply #8 on: January 31, 2014, 14:13:32 PM »

kinda hoping that i can take all mine off and grease it and it be ok, my bike did fall once, and bent my clutch lever, so is it a clutch cover off and clutch basket out jobby ?
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Pukapie
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« Reply #9 on: January 31, 2014, 14:18:30 PM »

I think so mate Sad 
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fatblokeonbnadit
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« Reply #10 on: January 31, 2014, 14:25:04 PM »

yes dontknow
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Reaper-Dan
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« Reply #11 on: January 31, 2014, 16:33:48 PM »

yes dontknow

bugger ill be getting really greasy tomorrow then lol.
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fatblokeonbnadit
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« Reply #12 on: January 31, 2014, 17:38:15 PM »

here you go, if the circlip has come off of the gear change shaft sprocket side the shaft can move towards the right, and the two pronged spring can fall off the end of the locating peg, and give the exact symptoms you describe or if its broken... But first id have all the linkage to bits to check. dontknow dontknow dontknow dontknow





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Reaper-Dan
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« Reply #13 on: January 31, 2014, 17:47:54 PM »

Thanks very much fb, wil have a look tomorrow if the rain subsides at all notworthy
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Pukapie
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« Reply #14 on: February 03, 2014, 09:34:26 AM »

Just an update, done 90 miles over the weekend and problem solved  icon_thumright     My gear lever is some cheap Chinese affair and the bushing was made of marshmellows and pie tins, so i had a friend of mine machine me up one out of phozzy bronze. This was such a precise fit that as soon as it got gummed up with road crap it had almost seized, hence making gear selection notchy at the best of times. Now its all lubed up again my gear changes are the best they have ever been, silky as you like, with fresh oil and fully rebuilt linkage/lever.
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