Rev Limiter?
 

Hi all,

wondered if anyone can help, not had my 748 for long, but when I open it up in 2nd, I seem to get to about 10,000 revs and it starts spluttering, almost like a limiter cutting in, I then have to change up and its fine, is this right? where does the red line start? I thought I would be able to wind it all the way round the clock??

Cheers

jelley

Sounds like you're running a 916 ECU (fuel chip) in there!

Check the type of chip you've got and see what setup this is for.

New chips from Ducati around about 25 quid - find "Nattyboy" on the board as I know he has some genuine DP chips going cheap that may be suitable if you need one.

Its a 2 year old bike, would someone have swopped the chip??

Jelley

Possibly - they may have fitted aftermarket cans and been given a chip at the same time.

The problem is that the 916/996/998 cans also fit the 748, and the fuel chips from the 916 and 996 also fit and look identical!

This is probably the easiest/quickest thing to check as you can do it yourself - check the engine management unit (the big metal block with the large connector on it) under the seat. Peel back the "DO NOT REMOVE" sticker and remove the rubber bung from the hole. You should see the fuel chip directly underneath. Note down any numbers on it (if it's an aftermarket chip it may well say exactly what it is, eg "916-45mm") and then check these with the Ducati spares catalogue to see which chip it is:

96502394C - 916 Monoposto '94, silencers Racing
965013AAA - 916 Biposto silencers Racing
965015AAA - 996 Racing silencers
965014AAA - 748 Twin-seat silencers Racing
965024AAA - 748R Silencers Racing

96502694C - 916 Monoposto '94, silencers Ø 50
965027AAA - 916 Biposto silencers Ø 50
965025AAA - 996 Silencers Ø 50
96506501B - 996S Silencers Racing Ø 50
965028AAA - 748 Biposto silencers Ø 50
965029AAA - 748SPS Silencers Ø 50
965030AAA - 748R Silencers Ø 50

965031AAA - 996 Complete assembly Ø 50
965032AAA - 996SPS/916SPS Complete assembly Ø 50
96503394C - 916 Monoposto '94, complete assembly Ø 50
96503494C - 916 Biposto complete assembly Ø 50
965035AAA - 916SP Complete assembly Ø 50
965036AAA - 748 Biposto complete assembly Ø 50
965044AAA - 748SPS Complete assembly Ø 50
965037AAA - 748R Complete assembly Ø 50

965038AAA - 996 Complete assembly Ø 52
965039AAA - 996SPS/916SPS Complete assembly Ø 52
965040AAA - 916 Biposto complete assembly Ø 52
965035AAA - 916 SP Complete assembly Ø 52

Other than that it may be a faulty TPS (throttle position sensor) which will need time at a dealer to be tested and fixed.

[Edited on 14-6-2004 by antonye]

The limiter on my 97 bike comes in at about 12K (running a FIM chip). I try to change up at about 11K though as that's at my peak power point

Do you have race cans fitted (or were they fitted before) this may explain why someone would change the chip

Well its meant to be standard, with no mods! its got original cans on it!

I'll check the chip tonight,

cheers guys

Certainly doesn't sound right - I know of one other guy (in the Essex DSC, funnily enough!) that had a replacement ECU supplied second hand which was supposed to be from a 748.

He had exactly the same symptoms as you, and it turned out that the ECU had a 916 chip in it rather than the 748 one.

Can anyone tell me what chip I have in my 996 Bip?

Took the cover off and the chip was covered by a white plastic bit. Took this off and the paper sticker on the chip says "Ducati Performance 08054/11.

It looks like the chip has been changed coz the sticker has been cut out around the rubber bung. The bike is running Arrow carbon race pipes but I don't know the diameter.

08054/11 is equivalent to the 965015AAA chip - 996 with Racing silencers.

Basically this should be fine with non-standard pipes upto 45mm.

Here's the complete list if you're interested...

Ducati ECU (Fuel Chip) Application List
=======================================

Taken from Ducati SBK Catalogue 2003
(old ECU codes are shown in brackets from 2001 catalogue)

96502394C (08054/1) - 916 Monoposto '94, silencers Racing
965013AAA (08054/3) - 916 Biposto silencers Racing
965015AAA (08054/11) - 996 Racing silencers
965014AAA (08054/6) - 748 Twin-seat silencers Racing
965024AAA (08054/15) - 748R Silencers Racing

96502694C (08054/19) - 916 Monoposto '94, silencers Ø 50
965027AAA (08054/20) - 916 Biposto silencers Ø 50
965025AAA (08054/22) - 996 Silencers Ø 50
96506501B (n/a) - 996S Silencers Racing Ø 50
965028AAA (08054/17) - 748 Biposto silencers Ø 50
965029AAA (08054/18) - 748SPS Silencers Ø 50
965030AAA (08054/16) - 748R Silencers Ø 50

96503394C (08054/2) - 916 Monoposto '94, complete assembly Ø 50
96503494C (08054/4) - 916 Biposto complete assembly Ø 50
965035AAA (08054/5) - 916SP Complete assembly Ø 50
965031AAA (08054/14) - 996 Complete assembly Ø 50
965032AAA (08054/26) - 996SPS/916SPS Complete assembly Ø 50
965036AAA (08054/7) - 748 Biposto complete assembly Ø 50
965044AAA (08054/8) - 748SPS Complete assembly Ø 50
965037AAA (08054/25) - 748R Complete assembly Ø 50

965038AAA (08054/23) - 996 Complete assembly Ø 52
965040AAA (08054/21) - 916 Biposto complete assembly Ø 52
965035AAA (08054/5) - 916 SP Complete assembly Ø 52
965039AAA (08054/24) - 996SPS/916SPS Complete assembly Ø 52