help bike keeps jumping out of gear

brendan · 08-12-2009, 7:41 PM

Hi there All

my 1989 cbr 400 rrk keeps jumping out on 2nd gear

what could be wrong with it

vville123 · 08-12-2009, 7:47 PM

You dont need 2nd gear..J/K

Did anything happen, like did you lay it down?

Does it do it everytime, only when its cold, only at xyz rpm when shifting up/down?

Whats the whole story.

Need more info

brendan · 08-12-2009, 8:02 PM

Quote:

Originally Posted by vville123

You dont need 2nd gear..J/K

Did anything happen, like did you lay it down?

Does it do it everytime, only when its cold, only at xyz rpm when shifting up/down?

Whats the whole story.

Need more info

to start with no i have not droped it

it started when i changes to bp fuel

and its almost every time i change up

it happens more under hard acceleration

vville123 · 08-12-2009, 8:11 PM

I really dont think it could be the fuel.

I'd say you have a few miles on it, and this is some what "normal" in a sence for the early cbr's with high miles.

I'd open the gear box and take a look inside, look for bits and shavings.

Jumping out of gear for no reason is a bad sign.

brendan · 08-12-2009, 8:15 PM

Quote:

Originally Posted by vville123

I really dont think it could be the fuel.

I'd say you have a few miles on it, and this is some what normal in a sence for the early cbr's.

I'd pull the gear box and take a look in side look for bits and shavings.

Jumping out of gear for no reason is a bad sign.

its got 28350km's on it =17719miles

and i didn't think it would be fuel bot it only started doing it when i changed the fuel

how much work is it to remove the gearbox

also some one siad it could be the clutch plates ??

vville123 · 08-12-2009, 8:21 PM

I'd check the gear box first if it's only 2nd gear.

I dont have that bike so I cant give you step by step on yours.

I'd get the manual and go from there if you have never done anything like this.

Also if you plan to keep the bike you will need the manual again.

Twincam · 08-12-2009, 8:27 PM

What happens when you change the fuel back to what you were running before?

It could mean worn internals... (gearbox)

brendan · 08-12-2009, 8:27 PM

Quote:

Originally Posted by vville123

I'd check the gear box first if it's only 2nd gear.

I dont have that bike so I cant give you step by step on yours.

I'd get the manual and go from there if you have never done anything like this.

Also if you plan to keep the bike you will need the manual again.

ok thanks for your help

also the hole gear box has become clunky and stiff to change gear

brendan · 08-12-2009, 8:29 PM

Quote:

Originally Posted by Twincam

What happens when you change the fuel back to what you were running before?

It could mean worn internals... (gearbox)

i haven't gone back yet

and that sound expensive

vville123 · 08-12-2009, 8:32 PM

If it's just a worn fork it can be done for cheap.

Pop it open and look you see bit of metal, shavings or broke parts if it's that bad?

brendan · 08-12-2009, 8:34 PM

Quote:

Originally Posted by vville123

If it's just a worn fork it can be done for cheap.

Pop it open and look you see bit of metal, shavings or broke parts if it's that bad?

but if i take it apart and i can't get the parts i can;t use the bike so i will need to get it done in a day so i can keep useing the bike

Twincam · 08-12-2009, 8:38 PM

Quote:

Originally Posted by brendan

but if i take it apart and i can't get the parts i can;t use the bike so i will need to get it done in a day so i can keep useing the bike

I think its best to start on a friday night, at least you have the weekend to play around with things.

Make sure you know where everything goes, (unless you have a haynes manual), either take pictures or make diagrams.

brendan · 08-12-2009, 8:44 PM

Quote:

Originally Posted by Twincam

I think its best to start on a friday night, at least you have the weekend to play around with things.

Make sure you know where everything goes, (unless you have a haynes manual), either take pictures or make diagrams.

i may put it into a shop or sale it on

what would it cost to fix ??

vville123 · 08-12-2009, 8:47 PM

Quote:

Originally Posted by Twincam

I think its best to start on a friday night, at least you have the weekend to play around with things.

Make sure you know where everything goes, (unless you have a haynes manual), either take pictures or make diagrams.

on taking pics, even if you do have a manual it will help when you put it back together.

Try to take Friday off, start on a Thursday night, that way if you have to get a part you have more days to work with.

Or go to a junk yard and get a whole gear box. (if your turns out to be shot)

Twincam · 08-12-2009, 8:50 PM

Quote:

Originally Posted by brendan

i may put it into a shop or sale it on

what would it cost to fix ??

Bladeracer would probably be able to tell you whats wrong with it, but tbh I'm not too sure. Without pulling her to pieces I wouldn't know whats wrong with her.

brendan · 08-12-2009, 8:53 PM

Quote:

Originally Posted by Twincam

Bladeracer would probably be able to tell you whats wrong with it, but tbh I'm not too sure. Without pulling her to pieces I wouldn't know whats wrong with her.

i know we don't know whats wrong with it at the moment

but what would the worst case scenario cost ??

Twincam · 08-12-2009, 8:56 PM

Have a look here > Click <

Not sure if you'll need it but at £20.00 including P&P it sounds reasonable.

Twincam · 08-12-2009, 8:59 PM

Heres another one... this one includes the shift drum, forks, 2 clusters and gear assembly - > Click <

More parts here and here.

brendan · 08-12-2009, 8:59 PM

Thanks Twincam

my mate keeps telling me i should sale the 400 and get a r6 or a gsxr 600

Surffrog · 08-13-2009, 3:53 AM

Quote:

Originally Posted by brendan

its got 28350km's on it =17719miles

and i didn't think it would be fuel bot it only started doing it when i changed the fuel

how much work is it to remove the gearbox

also some one siad it could be the clutch plates ??

I believe the engine has to come out of the bike to get into the 'box. First of all (and to save a lot of time, effort and money, do an oil change and look to see if there are any visible signs of metal. The engine/'box share the same oil, so if you chip a tooth or a fork that metal could be floating around the block.

If you can't see anything unusual in the oil, fill the bike back up with a cheapo oil and see if the change is any better. Mine used to be a clunky change when it was time for new oil. Afterwards she was slick. I had a lot more kilo's on my bike than you have on yours and I would often get too lazy to pull the clutch in.

My personal opinion is that the selector fork is bent. A lot of work to get to but quite easy to fix once you're there. If not that, then the shift drum. Either way there's a fair bit of work to get to the problem if this is more than just a neglected oil change.

Quote:

Originally Posted by brendan

but if i take it apart and i can't get the parts i can;t use the bike so i will need to get it done in a day so i can keep useing the bike

Doubt it. And I wouldn't recommend using it other than for the test ride with new oil. If there is bits of metal floating around in there you'll do more damage, which will cost more money and take the bike off the road for longer.

Quote:

Originally Posted by brendan

my mate keeps telling me i should sale the 400 and get a r6 or a gsxr 600

Yeah, well we've all got mates like that. Tell him you accept his offer if he's going to pay for it.

Twincam · 08-13-2009, 8:07 AM

Quote:

Originally Posted by Surffrog

Yeah, well we've all got mates like that. Tell him you accept his offer if he's going to pay for it.

NDMBlackBlade · 08-13-2009, 8:12 AM

gearbox is gone!
maybe just a selector fork!

brendan · 08-13-2009, 10:18 AM

Quote:

Originally Posted by NDMBlackBlade

gearbox is gone!
maybe just a selector fork!

i had to go to the docters on it this morning and it didn't just out of gear at all on the way there and back

i'm going to give it a oil change what oil should i use 10w40 ??

also my mate that keeps saying i should get a new bike only has a c reg fj1100

Surffrog · 08-14-2009, 12:19 AM

Quote:

Originally Posted by brendan

i had to go to the docters on it this morning and it didn't just out of gear at all on the way there and back

i'm going to give it a oil change what oil should i use 10w40 ??

Yep, that's the stuff

Don't forget to change the oil filter as well.

Quote:

Originally Posted by brendan

also my mate that keeps saying i should get a new bike only has a c reg fj1100

As long as you're happy with your bike (and without this jumping out of gear issue I reckon you are), don't listen to those people who just love to find a reason to suggest what they have is better than yours. Btw, a good rider on your 400 will beat your mate and his bike through the twisties

brendan · 08-14-2009, 6:07 AM

Quote:

Originally Posted by Surffrog

Yep, that's the stuff

Don't forget to change the oil filter as well.

thanks

As long as you're happy with your bike (and without this jumping out of gear issue I reckon you are), don't listen to those people who just love to find a reason to suggest what they have is better than yours. Btw, a good rider on your 400 will beat your mate and his bike through the twisties

its stopped jumping out or gear now anyway LoL i'm still going to strip it down when i can afford to thought

i'm going to do a mini service on the bike this weekend

and i need some new tyres as they have squared off they where like that when i got the bike but even with the ****ed tyres it still out handle his bike

just needs a bit more Power

cbrsam91 · 08-14-2009, 3:02 PM

if the gearbox is as jumpy and stiff as you say i doubt a oil change is going to sort the problem. you really need to look at it though cos if the parts are wearing broken or breaking and small filings are coming off. it only takes a few oilways to get blocked and you have **** it to be honest, then it becomes how to rebuild an engine rather than a clunky gearbox. a friend of mine had a gpz kawasaki and melted the clutch basket. after a full engine rebuild he ended up flogging it and getting a new 1. so it really needs opening up. i dont think its to difficult if your not to bad with a spanner. i cant emphasise the need for a haynes manual. you cant go wrong.
good luck

brendan · 08-15-2009, 8:10 AM

Quote:

Originally Posted by cbrsam91

if the gearbox is as jumpy and stiff as you say i doubt a oil change is going to sort the problem. you really need to look at it though cos if the parts are wearing broken or breaking and small filings are coming off. it only takes a few oilways to get blocked and you have **** it to be honest, then it becomes how to rebuild an engine rather than a clunky gearbox. a friend of mine had a gpz kawasaki and melted the clutch basket. after a full engine rebuild he ended up flogging it and getting a new 1. so it really needs opening up. i dont think its to difficult if your not to bad with a spanner. i cant emphasise the need for a haynes manual. you cant go wrong.
good luck

thanks

it seams to have fixed its self