Chain guard height - new larger sprocket? - Ducati.ms

DuckItalia · Jan 28th, 2012, 2:37 pm

Hi Guys,

I was wondering I'm gonna be putting a new sprocket on my duck in the coming months and was wondering because I will go with a larger rear Sprocket, will the OEM chain guard be an issue, I'll be going with a 42T rear, everything else stock.

If its an issue, whats the method you guys used to keep the chain guard and bring it up a bit to clear the new angle of the chain or did you guys just get rid of the guard?

Any help would be appreciated as I'm sure you all had that issue at one time or another...

Bike's a 2000 996.

DukeDesmo · Jan 28th, 2012, 3:25 pm

Plenty of space, a 42T sprocket is not much larger diameter than a (stock) 36T.

I've had a 41T on my 916 with no issues - just make sure you get a longer chain and adjust the tension in the correct direction.

marty da wrench · Jan 28th, 2012, 6:50 pm

I was told dropping the front gear one tooth is like adding three to rear
cheaper also
I allways replace sprockets and chain at same time

DuckItalia · Jan 28th, 2012, 8:16 pm

Quote:

Originally Posted by marty da wrench

I was told dropping the front gear one tooth is like adding three to rear
cheaper also
I allways replace sprockets and chain at same time

Ya, I actually went that way on my other bike (ZX7R)and I'm not sure if its related or not, but I had a tranny output shaft bearing failure at 35k on the bike, might be normal breakage or might be totally unrelated to the fact I used one tooth less on the front on that one. Notheless, I decided I'm gonna go with the rear only this time, only difference is I'm gonna need a new chain, but I had plans for that anyways since the bike has been sitting a lot before I bought it so a new chain won't be bad as this one seems to be dirty and rigid a lot, new front sprocket will be changed also to but I'll use an OEM 15T and this should give me a nice ratio with 15/42 for street.

Namor · Jan 28th, 2012, 8:26 pm

Quote:

Originally Posted by DuckItalia

Hi Guys,

I was wondering I'm gonna be putting a new sprocket on my duck in the coming months and was wondering because I will go with a larger rear Sprocket, will the OEM chain guard be an issue, I'll be going with a 42T rear, everything else stock.

If its an issue, whats the method you guys used to keep the chain guard and bring it up a bit to clear the new angle of the chain or did you guys just get rid of the guard?

Any help would be appreciated as I'm sure you all had that issue at one time or another...

Bike's a 2000 996.

Not being contrary to Desmoduke

I was running a 14-42 on my 996 and couldn't run the cover. I had the eccentric as far back as I could manage. That gearing was retarded high so I put 15 up front without adding links to the chain. Definitely no chance of a chain guard with that set up. In fact, the rear sprocket runs very close to the swing arm. A link or two would be ideal but I still couldn't run a chain guard.

Now, I don't use the chain guard. I zip-tied the brake line to the left rear set then to the right height adjuster so it wouldn't run into the bottom of the header.

After being on my 996 for a while, I strongly suggest a 14-40 or 15-41. A 15-42 is fun but hurts in the straits/long distance drives.

DuckItalia · Jan 28th, 2012, 8:29 pm

Quote:

Originally Posted by Namor

Not being contrary to Desmoduke

I was running a 14-42 on my 996 and couldn't run the cover. I had the eccentric as far back as I could manage. That gearing was retarded high so I put 15 up front without adding links to the chain. Definitely no chance of a chain guard with that set up. In fact, the rear sprocket runs very close to the swing arm. A link or two would be ideal but I still couldn't run a chain guard.

Now, I don't use the chain guard. I zip-tied the brake line to the left rear set then to the right height adjuster so it wouldn't run into the bottom of the header.

After being on my 996 for a while, I strongly suggest a 14-40 or 15-41. A 15-42 is fun but hurts in the straits/long distance drives.

In your last sentence, I'm assuming you meant 15-40 not 14-40 right? Cause 14-40 would be equivalent to 15-43 if I'm not mistaken?

TOP_DUC · Jan 28th, 2012, 9:27 pm

Quote:

Originally Posted by DuckItalia

In your last sentence, I'm assuming you meant 15-40 not 14-40 right? Cause 14-40 would be equivalent to 15-43 if I'm not mistaken?

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DukeDesmo · Jan 29th, 2012, 6:31 am

Quote:

Originally Posted by Namor

Not being contrary to Desmoduke

I was running a 14-42 on my 996 and couldn't run the cover. I had the eccentric as far back as I could manage. That gearing was retarded high so I put 15 up front without adding links to the chain. Definitely no chance of a chain guard with that set up. In fact, the rear sprocket runs very close to the swing arm. A link or two would be ideal but I still couldn't run a chain guard.

Maybe different chain guard? To be fair I have an aftermarket guard/hugger so it maybe higher than stock? (although I don't think so) but there is plenty of space.

This pic shows it fitted with a 39T rear but the 41T was only a few mm bigger and combined with an extra 2 links in the chain was not noticeably closer;

BTW I swapped to the 15/39 after having briefly tried 15/41 but found it too 'buzzy' for my liking.

Originally I used a 14/36 which gives around the same overall as a 15/39 but I prefer using a 15T front.

The only reason I used the 14T was that the chain and 36T rear were new so a 14T front gave me the same for less cost.

If you're swapping the whole set then best stick with the 15T front.