Ducati Sporting Club UK > Model Specific - Discussion, Technical Problems and Help > 998 / 996 / 916 / 748 > problem - bigger sprocket??

[bradders]

just spent most of the afternoon trying to change to a quick-change carrier. Got 39t sprocket, changed from 36t std. Probelm is, now the hugger fouls the wheel - didnt do it earlier as I had it mot'd at lunchtime!

This is what I have done (followed haynes manual):
remove carrier
remove cush drives
remove hub
remove sprocket
replace hub in new carrier
replace cush drives in new carrier
put on 39t sprkt

As far as I know, it went backlon the same as it came off.

On putting the chain on, the hub got 'reversed' so clockwise was tightening, took the sproket off, as the chain would not go far enough to reverse back (???) and reversed to the normal direction, ie c/wise slacken, put sprkt back on

no matter what I have done, back, forward, tight, slack, reversed, right way, the hugger fouls the wheel.

Questions:

Is is simply the chain is too short?
Is there any way in which I can put the hub back incorrectly?
Am I missing something simnple?

Thanks for your helps

[Albie]

Put an extra link in as you've pulled it nearer by increasing the diameter of sprocket.. I thinks

[bradders]

can I get just an extra link - anyone have one? The chain is in resonable condition and I would like to just bin it.

[GsxrAge]

You have got the centric adjuster in the lower position ??????



But it does look more like your chain aint long enough

[chris.p]

Best bet is new front sprocket & chain, that is if you intend on leaving it with the 39th on the back, have attached a guide for you re chain length( kindley donated by Shazam in an earlier post)


Chris

[andyb]

I guess a longer chain would be the answer, but to start with have you got the eccentric of the hub in the right location.ie the centre of the wheel where you put your stand should be lower than the centre line of the swingarm, ideally around 5 o clock as you look from the stand side.

[Edited on 5-3-2005 by andyb]

[Harv748]

Indeed, fitting the larger sprocket at the back has shortened your wheelbase if you are still using the same length chain.

Best off getting a couple of additional links put in...or if you are going to keep it like this for a while, perhaps a new one chain altogether. (tsubaki HD gold X-ring = £65-70 approx).

You really should be aiming to get the hub as far back as possible in the hub rotation...it makes a huge difference to the stability of the bike.

Once you've done that, and the chain is the correct tension, adjust the ride height back to suit. Sounds to me like you need a ride height tool

Shazzams table above holds the key...looks like 96 links are needed if its a 14 or 15 tooth front combined with your 39 rear. This looks as though is will give a good long wheel base at either +4 or + 8mm.

[Edited on 5-3-2005 by Harv748]

[bradders]

so if I go for a longer chain, what if I want to put a 36t back on? After all, I have bought the q/change carrier so I can swap em over

andyb - thanks for the reply mate but didnt understand a word!!

as far as I can tell, the hub is now correct, ie clockwise movement makes the chain loose.

Looks like a new chain...or buy 36t srpkt! Know which is cheaper for me at the mo...

Anyone know AJ Racing tel no - thats where I got it (I think!)

Thanks again, and if anyone fancies coming round and fixing it, my pride wont be hurt!LOL

[Harv748]

well there is only so much adjustment in the hub for all of the various sprocket combinations.

If you did compromise on the chain length (ie going for something that will cover a number of sprocket changes) then it will be at the cost of the wheel base length and therefore bike stability.

Guess you have to decide whats important to you, but personally I would want my bike to handle as best as possible ALL of the time, irrespective of the sprocket combination I was running.

Alans No is 01453 845 544

[Edited on 5-3-2005 by Harv748]

[bradders]

cheers Harv, I'll call him Monday.

Know what you mean about the handling, specially after what I have just spent having all sussies rebuilt! But tbh havent a clue about these things, guess its another trip to see a 'specialist' and more dosh....does it ever end?!!

maybe I should chop it in for a gixxer thou.....