View Full Version : 2004 Factory Idle problems

03-09-2004, 01:58 AM
Need some help - Have got a 2004 factory which seems run on one cyclinder at idle and minute throttle openings after which it seems Ok. Have had map 2 installed, have had the dealer play with the air mixture screws - to no avail. Rear cyclinder mixture screw does not seem to do a whole lot - called tech support Australian Aprilia importer and was told that that was how it was and that we would have to wait for another map from Aprilia also advised to wind the rear cyclinder air mixture screw all the way in and tune the front to suit.

Tried this and found to be worse than before, eventually set rear to 1 3/4 turns out and front to five turns out. Problem is still there but not as bad.

Have now sent the bike to S&R pro to have their fuel and timing computer installed I hope this fixes the problem.

Has anyone else had this problem.

Besides the idle problem the bike seem to go quite well have made a few mods.

*Dismantled stock pipes, removed cat and restrictive muffler, installed 60mm straight thru perforated pipe, repacked with fiberglass, reinstalled end cap - Sounds great and looks original and cost next to nothing. Will find out dyno figures in a week

*Flapper mod

*Suspension - Forks
28mm Sag 23% of stroke
5 Rings showing through triple clamp
1 Turn out - Preload
14 Turns out - compression
11 Turns out rebound

Suspension - Shock
35mm Sag 26% of stroke
35mm Raised ride height
14 Turns out compression
19 Turns out rebound

This setup seemed quite good at Eastern Creek race track
however the front spring rates seem to be to light. The bike is also booked into Shock Treatment in Australia to have some stiffer springs fitted and maybe a set of reactive springs.

We also went for a 1500km ride on a great variety of Ausie roads and found that the compression settings worked best when wound out 2 - 4 turns out from the above settings
The rebound was the same or out by 2 turns. and the preload was set at 2 turns out.

Any help on the idle problem would be apreciated.



/:aussie: :aussie: :banana:

Thunder Factory
03-09-2004, 02:31 AM
Welcome to the collective Slopie.

Have not experienced the problem you describe myself, and I'm not that technical, but others are so I'd say you'll have a response when they wake up and log in.

Out of interest what do you weigh so I can get an idea of the suspension set up and would you say this is a good road set up as well as track?


03-09-2004, 04:43 AM
Hi Thunder Factory

I weigh 84kg without riding gear

Before you adjust your suspension settings first set up your front and rear sag - the amount the bike sags from full extended to compressed with you on it in race position with gear on. Adjust front and rear preload to achieve the following.

Front Sag 25-33% of stroke
Rear Sag 25 - 33% of stroke and still maintain a free sag of
0 - 5mm

If you cannot achieve these settings or you have to preload the springs too much you may need different spring rates in which case you will need to go to a suspension specialist.

25% is more for the track and 33% is more for the road the preference is yours.

NB: Stroke length can be obtained from you manual

After these are set then ride the bike and see how it steers.
I found my bike steered to slow for me so I pulled the forks thru the triple clamps untill I could see 5 rings and raised the rear 35mm and found the bike steered a lot quicker

The settings I listed in the last thread were for Eastern Creek Race Track and seemed to work well however the front fork could still be bottomed quite easly and as the preload was already fully in we will be installing heaver springs. - I will up date you on their spec when they are installed.

The compression and rebound settings for the track were fine however we adjusted the compression and rebound settings out 2 - 4 turns and found it to be good however we still could have gone softer.

I hope this helps



:aussie: :aussie:

buzz lightyear
03-09-2004, 04:54 PM
dude this is the technic to sortin throt bodies .... you need a CO metre and the adapters that fit into the ehaust take off points in the headers(essential you cannot stuff the probe down the exhaust it doesnt work!!).
plug them in and set the CO ( on engine version 1 ) to 1 -1.5 %. this is how......screw both bypass screws in , open the rear screw by 1/4 turn then turn the front cylinder screw out till you get 1- 1.5% CO on the front go back to the rear then match to 1-1.5 % this will cure your worries my friend no worries!!!
this must all be done with the engine between 70-90 degrees
Best of luck


03-09-2004, 11:44 PM
Thanks Buzz

Will give this a go



buzz lightyear
03-11-2004, 12:43 PM
any joy dude with you prob?

03-15-2004, 03:09 AM
Hi Buzz

Thanks for the advise - had the bike set up as your instruction however still no joy.
Had S&R Pro in Sydney install a fuel and timing computer and run it on their dyno - Still no joy They tried to richen up the idle to tiny throttle openings and found that the aprillia chip seems to cut the fuel. I rode the bike and found it to be very rough at very small throttle openings and below 3000rpm.

Any way the dyno figures were quite good 129.5 hp at the rear wheel on 98RON from the local servo - home made pipe mod flapper mod but no air box mod.

Would still like to know if anyone else has had this problem.



Allan McDonald
03-15-2004, 03:40 PM
Are you sure that your bike was set up as per the instructions of buzz lightyear the important thing seems to be that the co readings are the same on both cylinders.
The right equipment is vital I have had the same problem with a new mille 04 but once the balance was sorted out it was perfect I did it myself with the help of Aprilia UKs excellent service tuition

Ps The bike was on map 2 and I set the co to 3.5%

03-16-2004, 12:03 AM
Thanks Allan

Will try it again at 3.5% CO



03-16-2004, 01:36 AM
Hi Allan

Will not be able to get to access to a CO meter for a while - Just wondering how many turns out from fully closed you have got on your bike as I may try it in the mean time. I know it will be different however I will try anything.

Mabe I should learn to turn the throttle a bit harder



Allan McDonald
03-16-2004, 06:29 PM
I have no idea I just twiddled the screws until the settings were right

03-19-2004, 05:23 PM
Hi Slopie,
I have also bought a new Mille (red rsvr) in Aus. And if it's of any help, I got the same story of the bikes having to need an updated map to cure the idle on one cylnder prob, seems amazing something so fundamental could slip through the cracks of pre production testing, very Italian, probably more concerned with getting the "race only" Arvin pipes rite, bless them.
I don't suppose you have a chart or a rough idea on spring ratings for weight? I'm a trim and nimble 110KG.

03-21-2004, 07:02 PM

Sorry to hear your bike has the same idle problem as mine. I am going to try the CO method again and try the setting on 3.5% as advised by Alan McDonald however do not have access to a CO meter at present. Does anyone have one handy in Sydney Australia.

Regarding the suspension - My bike is up at Terry Hays (Shock Treatment) - We are experimenting with different spring rates and valving I will let you know when I speak to Terry

I do have a Race Tech Fork Spring Chart however my scanner is cactus so I cannot send it to you - but if you send your fax no I will fax it to you.

The best thing to do would be call Terry at Shock Treatment on
02 4773 9115. He is a leader in the suspension field and is very helpfull.

PS: Tell him Long Dong sent you.



03-21-2004, 08:31 PM
Originally posted by RSV4ME
Hi Slopie,
I have also bought a new Mille (red rsvr) in Aus. And if it's of any help, I got the same story of the bikes having to need an updated map to cure the idle on one cylnder prob, seems amazing something so fundamental could slip through the cracks of pre production testing, very Italian, probably more concerned with getting the "race only" Arvin pipes rite, bless them.
I don't suppose you have a chart or a rough idea on spring ratings for weight? I'm a trim and nimble 110KG.

wow, terry is still doing suspension

keep the stock fork springs, the 1.0kg/mm fork springs are right for your weight, and you need a 660lb spring.

the racetech website is wrong.

03-21-2004, 09:12 PM
Hi Clarkie

Yeah he is still doing suspension and is always helpfull.

Do you have a spring chart if so could you post on this site.

Have you had to revalve the suspension on the 04 Factory
if so what problems were you tring to solve.

Also do you know of a fix for the idle problem we seem to be having in Australia.

Thanks Heaps


Johnny in Oz
03-21-2004, 09:22 PM
Hi Slopie,

I'm also in Sydney with an '04 Factory and heard of this problem as RSV4ME describes, but my bike does'nt seem to do this. At least not that I can notice.

I've clocked up 3K+ in 7 weeks of ownership so I figure I would have noticed something by now, but then again I'm certainly no mechanical whiz and if I don't have anything to compare it to, maybe I have'nt noticed it because I think it's normal . . . . if you know what I mean. Maybe we can meet up sometime and you guys can show me what you mean - Mt White on the weekend or maybe a trackday (I'm looking at 9th April at the Creek).

Anyway my dealer (Tom Byrne) mentioned it as a structural problem for all Aussie imports when I had the bike in for it's 1K service, but I really don't have a lot of faith in much that they say as they reckoned they'd fixed the non-existent rear brake on my bike, but still nothing. :mad:Useless even in trailing.

BTW, who do you Sydney-based guys recommend for servicing etc.?


03-21-2004, 09:24 PM
you can download a spring chart from the ohlins website.

i thought you had a RSV-R (didnt read good:D ) so you still need the 1.0 sprigs but the std springs in the Factory Ohlins forks are 9.5kg/mm springs.

you can read the numbers off the rear spring and match them up to the Ohlins spring chart.

as for revalving, its not so much of a need as a want, we are revalving the forks with the Ohlins upgrade kit for the 2003/2004 forks and we have ditched the rear shock in favour of a hand built, aluminium body, remote preload, trick-ass shock.

this is for one of our race bikes, the other is a built up RSV-R with GP Suspension 25mm superbike cartridges and a tripple adjuster (8987) Penske rear shock so we can show people there are two ways of getting the same result.

i actually prefer the GP Suspension/Penske combination to the Ohlins but thats just me.

as for your idle problems, i am still working on some ideas.....

03-21-2004, 09:44 PM
Hi Clarkie

Thanks for the advise - GP/Penske sounds trick - better check my wallet.


03-21-2004, 09:56 PM
Hi Johnny

I use Aitkens Motorcycles at Liverpool - Have Paul Aitken to be a genuine good bloke and John in the work shop to be ready and willing to help. - They are also working on the idle problem - give them a go.

Would like to go for a ride one day - have got a busy schedule for about three weeks however I will email my mobile number.



03-22-2004, 07:53 AM
hi slopie just had same problem of dealer being unable to get co2 synchronised-swapping the throttle bodies from an other bike sorted this but seems problem might return -aprilia have told him its a mapping problem.dont think he was too sure himself how swapping the throttle boddies cured problem if its mapping ??

03-22-2004, 08:17 AM
when your dealer uses the Axone to set the CO he should be aiming to get the rear cylinder 20 millibars less than the front, you dont want them the same

while this wont 'raise' the idle it will make it smoother

hey slopie, you already have the Ohlins, you dont need the GP/Penske stuff, that is just for people that want to upgrade the stock showa/sacs suspension but dont want to buy ohlins

03-22-2004, 04:23 PM
Thanks Team Fly & Clarkie

Will try with rear cyclinder 20 millibars lower than the front.

PS: Just joking about the GP/Penske suspension.

Also my dealer does not have a CO meter yet. I had it originally done when we had a timing and mapping kit installed.

Does any one know a dealer in Australia with a CO meter as I take it the adjustment has to be done in conjunction with the Axone

Thanks guys