2002 Black Tiger 955i.
Yesterday, the gearbox played up and seemed to slip into a false neutral, then up a gear, then back down to where it started, all without me touching the gear lever!
After that, 1st, 2nd, and 3rd were clanking every now and then (not regularly), 4th was better whilst 5th was just awful - clanking and rattling around and I could feel the vibrations in the footpegs. 6th seemed to be fine.
Acceleration (load) in 1st, 2nd, 3rd and 4th was OK and 6th no problem at all, but 5th didn't like it at all.
Getting home, I hoisted the bike onto a paddock stand and started the engine. Engaging each gear, it sounded and lokked as if the final drive sprocket (and chain) were dancing up and down. Again, 6th was fine.
My question:
Can I drop the lower crankcase without removing the engine from the bike?
If I could, would that be just a pain, and removal of the engine make life easier?
If I remove lower crankcase cover, what bed of nettles am I going to fall into??? Re-timing cams; special tools etc., etc.???
Any advice gratefully received. :roll:
Pretty sure about the only thing you can get to with engine in frame is the gearchange shaft, after clutch removal that is. Anything else requires engine out to split crankcase.
Tims right,your going to have to do some number crunching, would it be better to buy another motor instead of repairing the box.
It's a shame if you lived up here,I could get the job done pretty dam cheap in comparison to were you live,but you'd still need secondhand parts to make it viable.
OK. Thanks people.
One more question:
Is the '02 955i gearbox the same as an '05 955i?
I don't think the engine changed between these years, but I have been known to be wrong. Once.
Catch 22,the motor def changed because the water outlet on the block was moved from the side to around the back,Triumph tinkered with the gearbox as my bad memory tell's me,enough not to swap bits over?? I doubt it.
Your problem is the reason i attempted to buy another motor a few weeks back( see engine thread) just in case,if you can get parts for £150/200 then you have a chance of a cheap repair,after that a secondhand engine looks a better financial option.
Got just the shafts, gears, selector shaft and selector forks plus gear change shaft for £140. Don't need casings etc., and hopefully I can just use bits to sort problem.
Can't see Triumph making big changes to these bits.
But of course I will be wrong!
Only one way to find out :roll: ,at some time I've got to change the gear shaft on mine it got bent when I binned it last year,but untill it leaks or goes kaput :lol:
Hey, I'll send you one of mine (as I will have 2!) when you want it...
Keep in touch.
:shock: i wouldn't jump right in !! there's no chance the chains too slack and its skippin teeth ?? or the drive sprockets worn and hooked ?? or the chains got seized links ?? or the rear wheels out of line ?? :shock:
just my thoughts !!
good luck !!
KK
Quote from: "Champy"Hey, I'll send you one of mine (as I will have 2!) when you want it...
Keep in touch.
When your done,let me know.
Quote from: "KuzzinKenny":shock: i wouldn't jump right in !! there's no chance the chains too slack and its skippin teeth ?? or the drive sprockets worn and hooked ?? or the chains got seized links ?? or the rear wheels out of line ?? :shock:
Ditto that...If the bikes on a paddock stand then the suspention will be compressed.. the chain will bouce around a bit but not as much as having the bike on its center stand with the shock travel at max..also which sprocket is moving..wheel or gearbox?
Check for tightness of both and also check the cush drive rubbers, oh, check the chain tention also, mines around 3/4" of play with me sitting on the bike.
There are noises and 'clunks' coming from the gearbox.
1st to 4th are not too bad 4th being better.
5th is a nightmare whilst 6th is perfect.
This leads me to suspect that it isn't the chain and the teeth look good on both sprockets.
Interestingly, if you rotate the wheel backwards in neutral (engine off) it goes a little way and then locks up at the gearbox...
Parts will be arriving today, but I will do final checks on everything you guys have suggested because I REALLY do not want to strip the engine!!
I'm informed today,engine out,sump off,clutch casing and clutch out and you can then take the gearbox out.
managed to download a workshop manual ready to start the strip next week. Need to get gaskets etc. :cry:
Book says you need to remove Sump, Engine covers, Starter drive, Clutch and Oil pump drive!
Doesn't mention alternator stator however.... :?
Knew it was here somewhere, have a look at this it may shed some light on what has happened. Different gears but similar problem.
http://tigertriple.com/forum/viewtopic. ... ght=#63334 (http://tigertriple.com/forum/index.php/msg,63334&highlight=#63334)
Very interesting.
I haven't dropped this Tiger since I bought it, but of course you never know what happened in it's previous life... May have been wheelied, dropped whatever.
I did drop my 03 Lucifer Tiger and actually bent the gear lever, but never had an issue with the gearbox.
A mate dropped his Legend 885 carb and actually broke the gear lever shaft. Spent the rest of it's life with a lever welded onto the shaft!!!
Also interesting to note that when the guy stripped his engine, he left the clutch and drive chain in place???
Looking at the stripdown pics he did eventually strip it all out, splitting the cases is a straight forward job and fully explained in the manual, it does all depend on what the problem is in yours although it doesn't sound as extreme and could be salvaged. It is a balancing act between installing another engine or stripping and repairing existing. The trouble with only stripping the lower case is if something has let go then how can one be certain that all reminants have been removed as they will travel and the inside of the engine has to be really clean on assembly. When ever I build an engine the cleaning and building areas are completly remote from each other, so in conclusion although removing the lower case only will reveal the cause (or not) the engine will need a total stripdown if only to ensure compliance of cleaning.
Well. Finally fixed the Tigs gearbox! :D
Thankfully a mate let me use his workshop and hydraulic ramp, otherwise it would have been a nightmare job.
Everything came apart quite well, and I found 7 gear teeth along with other detritus in the sump! Following engine removal, I was very careful nit to invert the engine completely, and found that by keeping it at an angle, I could remove the 2 gear assemblies and sure enough, the 5th gears had lost.....7 teeth! :(
Checked and cleaned underside of engine to make sure nothing else could be lurking around before dropping in the 2 gear assemblies already purchased 2nd hand from a 2005 Tiger.
Re-assembly took about as long as dis-assembly, and I managed to break one of the lugs on the inner clutch basket whilst tightening the centre nut!!!
Could have fixed it with tapping a thread and using a CSunk bolt, but decided to get another 2nd hand clutch (£50) instead. :x
On start up, found I had forgotten 2 things: refitting the lambda sensor unit, and forgetting to re-connect the throttle position sensor plug! It ran very noisily and wouldn't rev! :roll:
That said, it now runs beautifully - smooth and back to normal gear changes. Oddly, steering feels very light and 'wandering' at low speed.
So, if anyone needs some good clutch plates, gear change shaft or gear selector shaft, I have them available!!!
Thanks everyone for all help, assistance and advice. Really appreciated. :wink:
Ian
Great to hear you are back on the road, lets hope it stays that way.
Weather is good for this time of year, good excuse for some more testing miles! :D