Gearbox problems

[stormspiel]

Went for a run last tuesday and the bike was running sweet as a nut. Did a good 20 or so miles and parked up for a few hours, let bike cool off and had a drink. Set off home and did about 10-15 miles down A1 at say a shade over the limit but nothing excessive. Pull off at my exit and gun it down the back lanes which open onto a nice straight then twist back up. Went throught the box and got to 4th.....no chance....all the presure in the world wouldn't shift it. Back ff the pace a bit and it went up into 4th..5th..6th easy.

My problem is this:

When i'm going steady the box is fine and goes all the way up and down with NO clunks or anything.
When i'm giving it some stick, 2nd's easy....3rd's fine.....won't hit 4th at all...which leaves bike screaming it's tits off in 3rd.
It's not hitting a false neutral as 3rd's still engaged when you drop the clutch.

Possible causes.

1, It's had a new clutch (Kawasaki O.E.M parts all round) about 800-1000 miles back.
2, I've just changed boots to a smaller pair and different toe profile
3, My gearbox has turned cannibal and is slowly eating itself starting with 4th gear

Any help or hints would be fantastic, I don't fancy stripping engine down and paying out for parts cos we've a holiday in 6 weeks and the missus would murder me.

EDIT: Sorry forgot to say

1998 C1
25000 just below
Serviced every 3000 inc plugs

[Steve-TC1]

Hate to say it but it sounds like the c model gearbox gremlins are showing there face

[stormspiel]

which means ??

Engine stripdown and replace with new bit ?

Sort of cost we talking withoout the labour charges ?

I've read a few of the gearbox threads in prep fr the worst but none give a list of components needed.

Is the E model a straight swap ?

Cheers

[Steve-TC1]

have a read of this , from what i'm reading i would do this slightly diffrently , but i haven't done one as yet so can't really say

http://ksrc-au.com/html/fixing_a_zx9r_gearbox.html

[stormspiel]

Don't take this the wrong way but thats not the symptoms i'm having, the bikes NEVER dropped off the cogs once its engaged .

The problem is that when trying to get into fourth, the lever kind of hits a ceiling and won't push into 4th. Every other gear is fine even changing 4th to 5th to 6th at redline is fine.

I've had the bike on paddock stand and redlined every gear before changing up and it's fine. It's only struggling when the box is under load i.e pushing my arse into the horizon.

Does this fix still apply

If so then i'd better start searching breakers and visiting bank of M&D Have bugger all luck with engines me

[thinkgreen]

im not sure but didn't kawasaki have a recall on the c1 gear box?

[ckleanth]

try adjusting your chain.. I had the same problem, but my chain was too loose and somehow this affected the gear change. initially i thought im fucked but I have to say after adjusting it the problem was reduced ( but will not disappear) try and push the gear lever all the way up while you do 3rd to fourth gear changes

[stormspiel]

Ok so i've fiddled with the chain, took the footrests and linkage off and cleaned them, adjusted position of lever to suit new boots and...........














IT WORKS

Cheers for the help guys & gals

[ckleanth]

Ok so i've fiddled with the chain, took the footrests and linkage off and cleaned them, adjusted position of lever to suit new boots and...........














IT WORKS

Cheers for the help guys & gals

You got me puzzled for a bit whether if you started striping the engine apart or not

[Steve-TC1]

strange it only happens on high revs , but if that fixed it

[thinkgreen]

i had same prob wi boots and that only happened at high revs. with me think it was a case of when taking it easy i was changeng gear more positive. and when i uped the pace think i was trying to do faster gear changes and it wouldn't have it with the adjustment being out

[Steve-TC1]

makes sense :!: :!:

[lillie_blue]

if it is the box chap you lookin at a grand had my c1 done 3years ago when striped out done 3 gears an 3 serlectors