XJS Diversion gear slippage

[Glowerss]

Hiya, as the title suggests, my baby is a XJ 400 Diversion. Under load in the higher revs (say, 7.5k+) such as getting up to motorway speed, it seems my bikes a bit prone to slipping gears. Either it'll slip out of gear completely into sort of a false neutral, or itll drop a cog. I"m not sure quite which because anytime I hear the engine race from the gear drop first instinct is to clutch in and power of sos it don't explode.

Any guesstimates for what could cause slippage like that? It's not too huge an issue seeing as how its not strictly necessary to reach those sort of revs, But I'd rather it not creep into more normally used revs either.

[nzspokes]

Hiya, as the title suggests, my baby is a XJ 400 Diversion. Under load in the higher revs (say, 7.5k+) such as getting up to motorway speed, it seems my bikes a bit prone to slipping gears. Either it'll slip out of gear completely into sort of a false neutral, or itll drop a cog. I"m not sure quite which because anytime I hear the engine race from the gear drop first instinct is to clutch in and power of sos it don't explode.

Any guesstimates for what could cause slippage like that? It's not too huge an issue seeing as how its not strictly necessary to reach those sort of revs, But I'd rather it not creep into more normally used revs either.

Has the clutch lever got any free play? May be over adjusted?

Both my old bikes needed a good shove to get them into gear to.

[Tigadee]

It's terrible without my XJ for two weeks now, almost forgetting how it rides!

My XJ's clutch problem [well, not really a problem, just a quirk] is that after it warms up, the clutch is very difficult to move up or down, and needs a really good shove [as Spokes describes] to get it to change gears. Am thinking to change to a synthetic engine oil to see if it helps smoothen that out...

Nothing to do with your problem, Glowerss, just made me remember mine, is all...

[gammaguy]

engine out

split cases

repair gearbox

alternative is a bike that can kill you if it jumps in or out of gear at the wrong time

[Glowerss]

Has the clutch lever got any free play? May be over adjusted?

Both my old bikes needed a good shove to get them into gear to.

Clutch Lever definitely is a bit loose. It's got a fair bit of play up and down as well as retracting it in, so it's a fair bet the clutch lever hasn't been over adjusted from my rudimentary working knowledge of such things lol.

[ducatilover]

Try going to a decent oil after adjusting your clutch, youtube it.
If that fails, and it's actually shifting itself out of gear, not just slipping the clutch, Gammaguy is right. Could have worn dogs.

[Tigadee]

Would a synthetic oil be good? I've read a few posts where clutch/gear issues have improved after switching to synthetics...

[ducatilover]

Would a synthetic oil be good? I've read a few posts where clutch/gear issues have improved after switching to synthetics...

I've had some bikes that like Motul Mineral oil and some that prefer the Motul 5100 synthetic. It won't hurt to try really (I always run Motul, has worked well for me)

[Taz]

My bikes like diesel oil.

I'll give you $500 for the diversion.

[carburator]

Hiya, as the title suggests, my baby is a XJ 400 Diversion. Under load in the higher revs (say, 7.5k+) such as getting up to motorway speed, it seems my bikes a bit prone to slipping gears. Either it'll slip out of gear completely into sort of a false neutral, or itll drop a cog. I"m not sure quite which because anytime I hear the engine race from the gear drop first instinct is to clutch in and power of sos it don't explode.

Any guesstimates for what could cause slippage like that? It's not too huge an issue seeing as how its not strictly necessary to reach those sort of revs, But I'd rather it not creep into more normally used revs either.

Worn dog's on the gears tend to make changes up and down the box interesting, however since it either
hits a false neutral or drops a cog ( changes down ) Id be look at the the selector drum first as this
sounds like worn or weak selector indent springs

[Glowerss]

Cheers for the info! I'll try adjusting the lever and changing the oil and see if that helps at all. Worst case scenario is the bike gets an oil change :P Hopefully that sorts it out and it's nothing too serious.

Edit**, Changing gears can sometimes be interesting. Particularly going from first to second. It'll click a bunch of times as if the clutch isnt fully disengaged and wont go from first to second. It'll click at me and sit in neutral unless I really slam it up. Not sure if related, however.

[ktm84mxc]

There's a few things it could be the clutch cable needs adjusting or it's frayed this usually happens near the lever, easy to check.
The shifting drum/forks are either bend or worn , the offending gears are chipped causing the missed shifts and dropping out of gear. Also check for free play in the gear lever/linkage as a worn spline can mean the shaft doesn't move far enough to engage the next gear fully.
Spend a few minutes checking any possible causes.

[F5 Dave]

Cheers for the info! I'll try adjusting the lever and changing the oil and see if that helps at all. Worst case scenario is the bike gets an oil change :P Hopefully that sorts it out and it's nothing too serious.

Edit**, Changing gears can sometimes be interesting. Particularly going from first to second. It'll click a bunch of times as if the clutch isnt fully disengaged and wont go from first to second. It'll click at me and sit in neutral unless I really slam it up. Not sure if related, however.
Probably very related. I agree with Gamma guy & KTM84. drain oil & pull that clutch side cover off. You want to check the gear lever action & see what is happening. if it has been crashed & slightly bent that lever, then maybe that is binding things, or there is damage to the 'C' push pull bit on the end of it.

Failing that teh grim reality is bent shift forks or damaged drum is likely.

Don't faff around with the 'gee maybe some oil will fix it', even if it masked the symptom, which i won't, the longer it is left more chances of gearbox destruction & potentially very bad consequences.