chain

[adam]

just ordered a D.I.D chain, 525, 94 links. looking at other chains on the web i notice most are 525, 120. is the one i have ordered ok? It is listed as the right chain for the 996,996R,998R. Is it better to have more or less links?

[sharpo]

Hey adam

I just got a DID525ZVM 94ZB, the bloke I ordered it through said that was the correct chain.

Does that help. :cool:

[ducv2]

Depends on the size of your sprockets, but I would guess you would have problems tensioning a 120 link chain on a 9*6;). 96 link on mine with larger rear sprocket.

[Edited on 8-2-2005 by ducv2]

[adam]

can you believe it, I go to this bike shop all the time, know everyone there. they quoted me £100 for the D.I.D 525vmx 94 chain, saying he was knocking off a tenner, just looked at M&P, same chain £74.99:o the shop have ordered it now although I havent paid yet. Is that a p**s take?

[Edited on 8-2-2005 by adam]

[adam]

I am going for the standard front and back.

[GsxrAge]

If it's too long take a few links out :bouncy:


If it's too Short OH S*** :roll::roll::roll:

[Festa748]

i think with standard sprockets on they are about 96 links so should be long enough

[Rattler]

You've got a 16th front sprocket on there Adam.

[adam]

did you put that on Tim or already on? is the standard 15th

[Rattler]

I did put it on, the standard is 17t.

She just pulled a lot better with one tooth less on the front. This also increased the wheelbase and gave me an even better excuse not to be able to pull wheelies!!!! ;)

Tim:ninja:

[chris.p]

May be this will help


Chris.:burn:

[TP]

Imagine a 996 with 14/48 gearing!

I'm just about to change to 14/39 ...

[smilo006]

Actually saw a bloke running 15 48 or 14 48.

Lasted half a track day before wrecking himself and the bike.

[TP]

14/48

I think you would really struggle to keep the front wheel on the deck!

[Delooney]

My 748s has standard sprockets. Under some serious throttle in 3rd it doesnt even raise an eye brow.

Me mates 995i Triumph has a reduced front sprocket and lifts up like a C90 with nitrous.

Does anyone recomend changing the front sprocket on me Duke ?

Delooney

[TP]

Common consensus is that as the 748 comes standard with a 14th front that if you want to lower the gearing you should go up on the rear.

[Delooney]

Is it common consensus that the rear mod is the way to go ?

Or should I just leave it standard ?

Delooney

[TP]

Originally posted by Delooney
Is it common consensus that the rear mod is the way to go ?

Or should I just leave it standard ?

Delooney

It's up to you really. If you're happy to sacrifice a little top end for more acceleration then go for it. For a 748 I would add teeth to the rear sprocket, go up 2 or 3 and you'll notice the difference I think. If you want a big difference add more but there are implications on your ride height so if you do it yourself make sure you measure your ride height before you start goofing around and set it back to that when you're done.

My 996 standard is 15/36 - I went to 14/36 and now I'm going to 14/39 :devil:

I don't use the top end anywhere so I'd rather have the seat of the pants acceleration.

[andyb]

Rattler how did a 16 tooth front lengthen the wheelbase?? To me thats a larger than std sprocket which would shorten the length of the chain ....unless you fitted a longer chain!!?

I think 15/38 is a nice compromise on the 99*s

[Rattler]

Originally posted by andyb
Rattler how did a 16 tooth front lengthen the wheelbase?? To me thats a larger than std sprocket which would shorten the length of the chain ....unless you fitted a longer chain!!?

I think 15/38 is a nice compromise on the 99*s


Sorry, my fault - too much sauce!!! I went one down on the front!! a 14t I think!!!
Tim

[Jon]

Yes you did Tim;) I did the same.

[Shazaam!]

I agree that 15/38 is a good choice for 998's and 999's, but not for 996's. Unlike the other two that have the close-ratio, the 996 has a standard-ratio gearbox that has taller 3rd-6th gears.

A better choice for a 996 is 15/43 (98-links.)

[TP]

Originally posted by Shazaam!
I agree that 15/38 is a good choice for 998's and 999's, but not for 996's. Unlike the other two that have the close-ratio, the 996 has a standard-ratio gearbox that has taller 3rd-6th gears.

A better choice for a 996 is 15/43 (98-links.)

What are the implications of running 14/39 Shazaam? Or even 14/43 ?

[adam]

Blimey, a 43 on the rear, does that come with sand bags to put over the front wheel? also are we talking large rear sprockets for the track, road or both. Dont know why you need to go that large for the road.

[Edited on 9-2-2005 by adam]

[andyb]

Adam your 996r is a 998cc.........youll be allright! 15/38 (have i just corrected the great one??):lol:

[adam]

this could be your lucky day andy, yepI think i will stick with the 15/38. thankyou.

[TP]

Originally posted by adam
this could be your lucky day andy, yepI think i will stick with the 15/38. thankyou.

You know you want the 14/43 ;)

:lol: :frog:

[andyb]

16/64...:sing:

[TP]

Originally posted by andyb
16/64...:sing:

:lol:

[adam]

tp, is that the time of the next train outa town?

andy, is that the time the train comes back into town:lol:

[Edited on 9-2-2005 by adam]

[TP]

:)

I've been running 14/36 for over a year and I'm happy to sacrifice a little top end for more acceleration by moving to 14/39

[Shazaam!]

Sorry, let me clarify ...

Andyb made a general suggestion that 15/38 was a good choice for 99* bikes. I just wanted to point out that the 996's are an exception because of their much higher gearing.

The 996R's use the close-ratio box like the 998's and 999's.

I wasn't suggesting using 15/43 for a 996R, adam.

[adam]

phew, thanks Shazaam.

[TP]

No definitely 14/42 for you Adam!

:lol:

I'll get my coat!

[Shazaam!]

Originally posted by tp-996
Originally posted by Shazaam!
I agree that 15/38 is a good choice for 998's and 999's, but not for 996's. Unlike the other two that have the close-ratio, the 996 has a standard-ratio gearbox that has taller 3rd-6th gears.

A better choice for a 996 is 15/43 (98-links.)

What are the implications of running 14/39 Shazaam? Or even 14/43 ?

The following engine speeds in 6th gear at 120Kmph will give you an idea of the difference in a 996:

15/36 3,890 rpm 94-links (stock gearing)
14/36 4,168 rpm 94-links
14/39 4,516 rpm 96-links
15/43 4,647 rpm 98-links
14/43 4,979 rpm 98-links





[Edited on 2-9-2005 by Shazaam!]

[Redruth]

Originally posted by Shazaam!
Sorry, let me clarify ...

Andyb made a general suggestion that 15/38 was a good choice for 99* bikes. I just wanted to point out that the 996's are an exception because of their much higher gearing.

The 996R's use the close-ratio box like the 998's and 999's.

I wasn't suggesting using 15/43 for a 996R, adam.

Oh man, Shazaam. I've been trying to follow this, wrote down your advice on a yellow sticky even! Now I'm totally confused. I think I have standard chain and sprockets on my 996. I want to increase the low down torque without affecting the top end enjoyment too noticeably. Is there a solution for that? :puzzled:

[TP]

Originally posted by Shazaam!
The following engine speeds in 6th gear at 120Kmph will give you an idea of the difference in a 996:

14/39 4,516 rpm
15/43 4,647 rpm
14/43 4,979 rpm

Ok, so I'm cool with that. My question is more on what type of chain to run 14/39 or even 14/43, seeing as I'm now thinking of 14/43

[Shazaam!]

Originally posted by Redruth
I have standard chain and sprockets on my 996. I want to increase the low down torque without affecting the top end enjoyment too noticeably. Is there a solution for that? :puzzled:

The 996 and 996S bikes are the highest-geared Ducati superbikes. Extremely over-geared.

If you replace the stock 15/36 set-up with 15/43, as I suggest, your tach at 70mph will read about 750 rpm higher (4,647 instead of 3,890) but you'll be using all your gears now, instead of just the bottom four or five. It'll be much easier to launch off the line as well.

[Redruth]

Originally posted by Shazaam!
Originally posted by Redruth
I have standard chain and sprockets on my 996. I want to increase the low down torque without affecting the top end enjoyment too noticeably. Is there a solution for that? :puzzled:

The 996 and 996S bikes are the highest-geared Ducati superbikes. Extremely over-geared.

If you replace the stock 15/36 set-up with 15/43, as I suggest, your tach at 70mph will read about 750 rpm higher (4,647 instead of 3,890) but you'll be using all your gears now, instead of just the bottom four or five. It'll be much easier to launch off the line as well.

I get the gist, but this is a bit too technospeak for me. What does this mean

"your tach at 70mph will read about 750 rpm higher (4,647 instead of 3,890)"

:puzzled:

[Redruth]

So a 'tach' is the thing that shows the revs, right?

Hats off to ya. That you can quote figures as accurate as 4,647 and 3,890 on chain and sprocket change.


Whatever the outcome of the know all quiz, I'm sending you a prize :D:D

[TP]

Originally posted by Redruth
Whatever the outcome of the know all quiz, I'm sending you a prize :D:D

There'll be some extra postage on that one!

[madmav]

Ok i have a Question for Shazzam?

When i was in germany on the AutoBarn
and we all did some high speed runs


i noticed the maximum speed i could get in 5th gear would not increase when i hooked 6th gear

some times on a down hill section she would gain 4-8 mph more!

and it would not pull anymore revs in top gear!!

as i have spent most of my life on jap bikes !

i just assumed the bike had run out of HP (Horse power)

and therefore had not got the power to pull back into the sweetspot in 6th gear

so if i go for the 15/43 option will the bike give me more top speed because it can pull back up into the power /torque range in top gear?

or will it just BLOW UP!!!

[Redruth]

Originally posted by tp-996
Originally posted by Redruth
Whatever the outcome of the know all quiz, I'm sending you a prize :D:D

There'll be some extra postage on that one!

That's already factored in, mate!

Not that I intend to prejudge this whole thing, but frankly, he's out there in no-man's land, aka HarleyDavisonworld.com and he needs all the encouragement he can get!

[Edited on 9-2-2005 by Redruth]

[Shazaam!]

Originally posted by Redruth
What does this mean

"your tach at 70mph will read about 750 rpm higher (4,647 instead of 3,890)"

:puzzled:

With your current stock 15/36 sprockets and 94-link chain, your tach will read 3,890 rpm in 6th gear when your speedometer reads 70mph.

When you change the rear sprocket to 43-teeth (which requires a longer 98-link chain,) your tach will then read 4,647 rpm in 6th gear when your speedometer reads 70mph.

You'll be reving higher at the same road speed - in any gear. You'll also gain more torque for starting-off too.

Clear?

[Shazaam!]

Originally posted by madmav
Ok i have a Question for Shazzam?

so if i go for the 15/43 option will the bike give me more top speed because it can pull back up into the power /torque range in top gear?



It depends on a number of factors, but essentially you've got the right idea. To reach the highest to speed you need to keep lowering the gear ratio until you max your terminal velocity concurrent with your red line. Trial and error will give you the answer. The biggest factor is air drag which quadruples when you double speed. 15/43 is a nice all-round ratio, but probably isn't the best top speed ratio.

[madmav]

Thanks Shazzam!
i'm sure i'm running 14/38 at the moment not sure i will check to morrow!;)

[Redruth]

Thanks Shazaam. I actually understand all of that now. :D:eureka:

[Edited on 10-2-2005 by Redruth]

[andyb]

Originally posted by Shazaam!
Sorry, let me clarify ...

Andyb made a general suggestion that 15/38 was a good choice for 99* bikes. I just wanted to point out that the 996's are an exception because of their much higher gearing.

The 996R's use the close-ratio box like the 998's and 999's.

I wasn't suggesting using 15/43 for a 996R, adam.

Damm! I thought id caught him out, sat here smiling to myself....

[adam]

Right, im going to buy 15/38. also im going to buy some spare teeth so i can glue them on depending where i am riding. Bostic or evo stick should work on metal. this way i will cover all situations.;)

[andyb]

get a renthal carrier mate and two or 3 sprockets 38.40.42... job done!

[adam]

i have already got the carrier, now have a 36 on the way. upto what size sprocket would i need to change the length of the chain from the 94 links?

[andyb]

The problem is withg the eccentric hub mate. You can probably fit up to 40 tooth sprocket with that chain, but you will be moving your rear wheel further and further forward.

Not only will you lose stability, it will also alter your ride height!

Have you got the chain yet?

Viewing from the chain side the eccentric wants to be sitting at around 5 o clock. With the ultimate length from swing arm pivot to wheel centre of 500mm.

[madmav]

shorter wheelbase !

quicker steering but as Andy says can be twitchy!

do it rite if not you will die!;)

[Shazaam!]

http://home.san.rr.com/shazaam/Sprockets.jpg

[adam]

havent got the chain yet. is it wise to go for the 96 chain?

[Edited on 10-2-2005 by adam]

[Shazaam!]

For a 15/38 the 96-link chain is best for two reasons:

You get a longer wheelbase for high speed stability, plus you can raise the rear ride height back to the previous position.

Unfortunately, a 94-link chain will raise the ride height (because of the eccentric adjuster,) and because the rear ride height adjuster rod is in it's shortest/lowest position from the factory, you won't be able to bring the rear ride height back down.

[electricsheep]

Originally posted by Shazaam!


http://home.san.rr.com/shazaam/Sprockets.jpg

Hi shazaam, have you got a guide like that for the 749/999

Rob

[Edited on 10-2-2005 by electricsheep]

[Shazaam!]

http://home.san.rr.com/shazaam/SprocketsX99.jpg

[madmav]

Whats the best ride height setting?

and could i make a Tool to set it without having to buy that very expensive ducati one!

Shazzam??????;)

[Shazaam!]

Make one like this.

http://home.san.rr.com/shazaam/RideHeightTool.jpg

The rear is very sensitive to height changes. It can drastically change the way the bike turns and holds a line.

As a rule, the more rear ride height you add, the faster the bike will turn. The ride height should be set to make the bike turn quickly, not fall into a corner, or require rider input to hold a line.

Start with the stock setting and raise it a couple mm at a time. You'll see what I mean.

[andyb]

Mav, that is a datum tool. Cant you persuade JHP to have some made up? as pattern copies??

Im wondering if the 999 one is the same tool as the 998etc??