Some Technical Stuff Bout Gear Changing + Chain Lube

[WildGoose]

first off

why does a bike jump out of gear, when ever im trying to make maximum progress i.e overtaking, pulling away faster than someone else, or just goin for it in general, in first gear, rev to the top, change up, start to rev through 2nd gear, then MMIIIIIIIIIIOOOOOOOOOOOWWWWWWWWWWWWWWWWWWWWWWWW! its dropped out of gear into neutral

i have certain problems with this:
1)your head refuses to continue to work until the bike is in second gear again
2)by standers natural reaction is to run for the nearest air-raid shelter
3)motorists become alarmed, which may cause them to do something stupid, like ride into me
4)it doesnt look cool

if its normal, then can i have a technical (keith ) explanation as to why, and what is happening inside the bike when this is goin on

i have a feeling it may just be my shite gear changing though, so if thats the case, got any tips?

ive tried being really positive footed, but i have found once or twice, that i have managed to push it too far into second, which causes it to drop into neutral between 2nd and 3rd (if you understand me) i have no clue what im talking about, so do your best to set me straight

also, about lubing the chain, do you just spray the chain, down by the driven gear (i.e the back wheel), all the way round, is this enough?

cos my thinking is, that it will only get the outside and sides of the chain, and not the inside, again this may just me being stupid, but any thoughts would be good

and also how much do i put on, my chain lube is gold, so i just sprayed it all the way round today till the chain appeared gold, correct?

thanks for the help
____________________
So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

[Phoenix]

urrr, you're overtaking cars in 1st gear on a 250?

You're in way too low gear mate on a 250 you only really wanna be in 1st when u pull away or are waddling along filtering. As for it slipping out of gear, could be a knackered clutch but I very much doubt it, maybe you'r not quite pulling the clutch in enough..letting it go too soon or not timing it right. Basically though, dont ride off in 1st gear go upto 16K revs then change up to second, id change up as soon as you're moving at a decent pace.

[Keith]

Hi

It is not normal for it to jump out of hear. Normally this is a sign of a worn gearbox (our GPZ500 does it sometimes, its a real pain). Think selector forks wearing cause this.

It can also occur if you do not put it properly into gear, and also can be made worse if the clutch adjustment is not correct.

Take it back to where you got it from and get them to have a look (it is still under warrenty I think?). It may be simple to fix in a few minutes, but at least if you mention it they cannot try and back out later.

As to chain lube, the important bits are the rollers and (esecially on an O ring chain) the bits between the side plates.

Using too much chain lube is a problem as grit will stick to it and make a nice grinding paste.

Being honest most of the time I use old engine oil. Cheap and easy, but doesnt last that long. Has the advantage that as it disappears it takes the grit with it.

All the best

Keith

[WildGoose]

phoenix, im not trying to call you wrong or anything, but the CBR can do just over 45mph in top gear, i dont normally change up till over 10k when pulling away cos the power doesnt start till about 12

and yes keith, its still under warranty, ill contact box hill tomorrow and see what they say

thanks for the advice both of you
____________________
So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

[G]

[Phoenix]

ya maybe so, my ZXR does about 55 in 1st I think, but I never redline in first very little point. But if you overtake in 1st you're gonna run out of acceleration while overtaking and need to change up. say you're goin along at 40 in 3rd gear...that gives me a decent time of acceleration enough to hit 70 and be well gone.

[Keith]

Hi

It may well be an easy fix, and they may just tell you to change gear more positively (which might fix it if they are lucky), but you can try and get them to have a play and adjust the gearchange linkage a bit to suit you.

Either way, at least if you mention it now it makes it far harder for them to try and get out of fixing it in the future if it really does turn out to be a major problem.

Years ago we had a TZR125. This was under a year old and kept getting false neutrals. That just turned out to be clutch adjustment

All the best

Keith

[G]

You probably need to be quite near/in the redline when you nock it up on a 250/4, otherwise the engine'll drop out of the powerband... well that's what it's like on my NSR anyway

[WildGoose]

yes, and i thought the idea was to change gear whilst in the overtaking process anyway, but either way you are forced to on my bike, cos you need 16k plus to make really good progress and you need to redline ever gear, cos it sounds so good
____________________
So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

[Ropehead]

i had that same thing with my Tzr i just popped out of gear,
it tends to be a worn spring thing inside the gear box, not a huge job to fix just a bit messey,
Get it back 2 the shop

[Zimma]

I know i only had one go on it, but i didnt seem to have any probs with the gearbox goose. Either way, I'd get it back to boxhill and get em quickly to have a look before they try to give it
____________________
-Zimma

[Hunter]

The transmission can sometimes jump out of gear if you don't put it into gear completely. Its not normal and can be serious if you don't have a look at it quick!

It does not sound like a slipping clutch, it could be a problem with shift forks inside the gearbox. How many miles do you have on the engine?



Pradeep

[WildGoose]

its on like 12000 km's which is between 6 and 7000 miles

it isnt happening all that often not at all today, so it may just be my gear changing, but i'll ring them anyway, see what they say
____________________
So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976

[guest]

hi,

it may be that the gear jumping and the chain lubing are related, if you liberally soak your chain with new 90 weight gear oil and work it in with your fingers to get rid of any tight spots (messy but effective), you might find that the problem with the gear change disapears. i would still take it back to the shop though, as once you've notified them of a potential problem they shouldn't duck out of it later on if it turns out to be expensive. i would also make sure that the chain is adjusted to makers spec. after lubing, as this will help with smoother gear changes.

cheers carl.

[WildGoose]

the chain as far as i know, if perfectly adjusted, it was serviced in full before i got it so that shouldnt be a problem

but thanks for all the advice everyone, and i will notify box hill of the problem, just like to say to keep them in the loop, so they will be ready for anything that may go wrong later on
____________________
So in other words, he stopped you for being flagrantly in posession of a motorcycle in direct contravention of the Hippies, Darkies and People Whose Face I Don't Like The Look of (Police Powers) Act. 1976