Idle adjust on cold
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Category: RSV / RSVR / FACTORY
Forum Name: Technical Chat
Forum Description: Any technical problems or useful advise for other owners, remember this is just advice posted here, if you make something go BANG in a big way don't take anyone to court about it.
URL: http://www.rsvr.net/forum_posts.asp?TID=30169
Printed Date: 27 Mar 2026 at 02:25
Software Version: Web Wiz Forums 12.07 - https://www.webwizforums.com
Topic: Idle adjust on cold
Posted By: tfcoulson
Subject: Idle adjust on cold
Date Posted: 25 Aug 2024 at 22:58
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Hi, I have to increase the idle screw when I start the bike (right hand side screw below the tank) when it is cold. (Also putting on the throttle adjust before starting). If I leave it at the normal riding position it would cut out after putting the throttle adjust back down after starting it. Once riding and warming up I need to reduce the idle otherwise the idle revs will be a bit high (2k+ instead of 1250). Any thoughts on what could be causing this? Thanks |
Replies:
Posted By: 426hemi
Date Posted: 26 Aug 2024 at 07:37
| How long are you leaving it before you shut the fast idle off ? |
Posted By: redratbike
Date Posted: 26 Aug 2024 at 09:52
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have you ever adjusted throttle cables or fast idle cable , had the throttle bodies set up by some one that knows what they are doing ? cables stretch, bolts/screws vibrate loose over time could be as simple as this
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Posted By: tfcoulson
Date Posted: 26 Aug 2024 at 18:31
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Only a few seconds before I shut it off. So near enough once ot starts. I adjust the idle screw before I start it though otherwise it would probably cut out as the revs get so low.
I Throttle cables have been replaced, a couple of years ago maybe. Although if it was something like that, why would the idle need adjusting when it's warm? Never had the throttle bodies setup.
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Posted By: Spoonz
Date Posted: 26 Aug 2024 at 18:58
Are you sure the fast idle lever is actually doing anything at the tb’s. It essentially opens the throttle so exactly the same thing as the idle screw so it’s either not doing its job or not opening it enough. Maybe the cable has broken etc. |
tfcoulson wrote:Posted By: redratbike
Date Posted: 26 Aug 2024 at 19:29
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lift the tank and take a look at everything ------------- |
Posted By: tfcoulson
Date Posted: 26 Aug 2024 at 20:10
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yep both are definitely adjusting the revs |
Posted By: Spoonz
Date Posted: 26 Aug 2024 at 20:36
I suspect the fast idle isn’t opening the throttle enough. If it was it should be putting the revs outside of the range of the idle control.
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Posted By: tfcoulson
Date Posted: 27 Aug 2024 at 22:52
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So you mean that if the fast idle is fully on then adjusting the idle screw shouldn't do anything? At the moment if I pull the switch down fully before I start it will rev to about or a little over 3k.
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Posted By: Spoonz
Date Posted: 28 Aug 2024 at 07:20
| Something is not right if your bike will stall at 3k when cold. From memory the idle screw only goes +/- 500rpm. You could try setting the tps but maybe the tb’s and co needs a proper setup. |
Posted By: IanG
Date Posted: 28 Aug 2024 at 13:28
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I would think a tb setup was long overdue if you've never had it done. It amazing what a difference having it done can make if the adjustment is off. ------------- www.apworkshops.co.uk www.apriliaforum.co.uk www.apriliaownersclub.co.uk Looking forward to the next track day |
Posted By: redratbike
Date Posted: 28 Aug 2024 at 15:56
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yep as mentioned previously a throttle body setup by someone that knows these hikes can change the way the bike samrarts and rides 👍 also the fast idle leaver should hit about 5k if o remember correctly not got one on the falco just wind the idle a couple of turns , start it without touching the throttle lever and wind back the idle one warm , Rob who owned it previously didn’t swap the fast idle onto the 57’s 👍 works a treat best starting april i have had £ ------------- |