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[Leon Novello]

The purpose of a left-hand threaded nut is to ensure the nut does NOT come loose, but will tend to tighten. Has someone in the design department got it wrong?

[Super45]

I'ts more likely my bike thats the issue than a design fault since purchase last year ive come to conclusion its been severely starved of maintenance in its 23,000 miles and ,judging by the amount of rust on it its been someones winter bike, ive discovered loads of bodges, poor maintnenae loose or missing bolts etc whilst sorting the issues its had so this is just one in a long list

[stinkwheel]

My understanding is that the nuts don't and wont tighten themselves, the reverse threaded nut will simply help prevent it loosening itself by mechanical precession but it is unlikely to get tighter than when it was put on. If there is a lot of play about, it can come loose, just like any other fastener.



So I'd say the nut on the other end IS worth a check. If the clutch centre nut became loose, it stands to reason the gearbox mainshaft nut could also have become loose by the same mechanism.

[Super45]

Thanks Stinkwheel will check the nut is tight and report back

Someone has had the clutch apart before and the washer was missing from behind the nyloc nutwhich I suspect is what started the issue

[vince]

Hi, if it's not the nut check if the selector springs have broken. There are two in situ. Vince. Ps the lefthanded nut has been loose on every albion box I've dismantled.

[stinkwheel]

I'll add that when I was having trouble with the 4-speed box on my 350 bullet which got progressively harder to find first, then started jumping out of first, I landed up finding more than one problem. The ratchet mechanism was pretty worn so I swapped that out which helped a little but not much. I eventually "bit the bullet", drained the grease and stripped it properly. I did this with the box in-situ on the bike.



I found two things, the first was an horifically bad fit between the sprung detent and the selector arm which I fettled with a hand file (this being a precision piece of engineering equipment to whatever they used to fabricate the part initially. I suspect the factory employs a blind guy with one arm and an angle grinder). The second was extensive chipping of the dogs on two of the gear clusters, which I replaced.



This all sounds like a huge amount of hassle to fix but was, in reality, a total of one afternoons work. The worst bit was cleaning all the stinking grease off every part I wanted to work on. The box itself is not a complex piece of machinery. I took plenty of digital photos as I dismantled it in case I forgot where anything went but as I recall, they were unecessary. None of the parts are particularly expensive either so if something looks worn/dodgy, just swap it out.

[Super45]

Thanks Vince

Are they easy to get our without disturbing anything vital?


@Stinkwheel good to know although if gets to that sort of stage It may be farmed out to someone who has more time than me to fix it (12 month old child whos into everything ) are there any specialists in east mids/west mids area besides out hosts?

[Jamesy]

I am glad I read this post because an ongoing problem trying to get my b350 into first without "crunching" may be attributed to some of the faults listed here.If I do find a related problem I will post here.I had the clutch stripped out at the weekend but could find no apparent problem.

[Super45]

@ Jamesy

If mine goes in gear it stalls no crunch clutch isnt adjusted coreecdtly at the moment so thats another job

[Leon Novello]

I have posted this previously, but it`s a little light reading for the weekend.
http://www.snowvalley.20m.com/bikes/clutches.htm