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Rsv4 problem

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Category: RSV4
Forum Name: Technical Chat
Forum Description: Chat away about how to take apart the V4 (and put it back together hopefully)
URL: http://www.rsvr.net/forum_posts.asp?TID=14566
Printed Date: 27 Mar 2026 at 04:53
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Topic: Rsv4 problem
Posted By: Murra2890
Subject: Rsv4 problem
Date Posted: 05 Jul 2014 at 19:16
Hi guys can anyone help

Bike is a 2010 rsv4r with full bazzaz

Basically the bike wont rev past 9500, it's like hitting a massive flat spot in the fueling

Bazzaz has been on since feb with no problems until now. I will remove it as the first job but just wanted to know if anyone had any ideas. Revs great until the said 9500k

Done some googling at alot being said about tps going wrong on some models.

Cheers



Replies:
Posted By: Spoonz
Date Posted: 05 Jul 2014 at 19:42

Originally posted by Murra2890 Murra2890 wrote:

Hi guys can anyone help

Bike is a 2010 rsv4r with full bazzaz

Basically the bike wont rev past 9500, it's like hitting a massive flat spot in the fueling

Bazzaz has been on since feb with no problems until now. I will remove it as the first job but just wanted to know if anyone had any ideas. Revs great until the said 9500k

Done some googling at alot being said about tps going wrong on some models.

Cheers

Don't think there is an awful lot you can do diy on those to test things but it was the demand sensor that had lots of issues and got recalled. Worth getting that checked out as it determines the load you are calling for from the throttle. Might just need a throttle learning done again.

The v4 runs 2 injector banks with the upper set kicking in about 7k revs upwards so maybe there is a problem and there is a fueling issue on the upper injectors. I have heard of a few stuck at 7k revs because the 2nd injector bank is down so maybe a partial bank would get you to 9.5k

Bypass of the Bazzaz would be a good starting point though as it would narrow the field. I would also speak to Griff and Lewis @ AP as they had a v4 with a Bazzaz issue last time I was there and might recognise the symptoms if it is a known problem with that unit.




Posted By: Murra2890
Date Posted: 05 Jul 2014 at 22:17
Thanks for the information very helpful.

I doesn't feel like a demand issue As it's trying to pull past 9.5 and probably would if I kept the throttle open.

Sounds like a dodgy connection somewhere in upper injectors by what your saying. I'll take a look tomorrow.

Is griff and co on here?


Posted By: Spoonz
Date Posted: 05 Jul 2014 at 22:45

Originally posted by Murra2890 Murra2890 wrote:


Is griff and co on here?

Yes, Fusebox.

The upper injector issues i saw generally stem from a poorly seated upper rail fuel line which sits right next to the ecu connectors. When fiddling with the ecu the line gets dislodged or removed and not re seated correctly. One I read about went 1k before the fault showed itself when the unclipped pipe eventually worked loose.

It can look connected without being properly clipped in place. I believe there is a valve assembly in the quick release connector which will stop/restrict flow if it's not seated properly to prevent fuel leakage. It could be a red herring as the few I read about didn't make it as high as 9.5k but you never know.




Posted By: Murra2890
Date Posted: 06 Jul 2014 at 15:57
Thanks for replies

Still no joy

So far,

removed bazzaz
Checked all fuel pipes
Checked crank breather
Checked air fikter
Checked all injector connections
Checked map connections
Checked exhaust valve isn't stuck

Really at a loss, bike will pull to 9.5k effortless then loses power. It will pull through to redline but powerless. Also gives a weird noise at around 10k hard to explain sounds like it's coming from airbox are or front cylinders.

Anyone any ideas please? If I had to call AP do you think they would give advice over the phone?

Thanks


Posted By: Spoonz
Date Posted: 06 Jul 2014 at 16:57

Originally posted by Murra2890 Murra2890 wrote:

Thanks for replies

Still no joy

So far,

removed bazzaz
Checked all fuel pipes
Checked crank breather
Checked air fikter
Checked all injector connections
Checked map connections
Checked exhaust valve isn't stuck

Really at a loss, bike will pull to 9.5k effortless then loses power. It will pull through to redline but powerless. Also gives a weird noise at around 10k hard to explain sounds like it's coming from airbox are or front cylinders.

Anyone any ideas please? If I had to call AP do you think they would give advice over the phone?

Thanks


Probably do what they can on the phone which probably isn't much for a v4 to be honest. They are doing a mobile service day in Scotland soon I believe at Andi's place.



Posted By: Murra2890
Date Posted: 07 Jul 2014 at 11:13
Yeah I saw that coming up. Got a trackday on 26th was hoping to have it ready for then.


Posted By: Murra2890
Date Posted: 07 Jul 2014 at 21:14
Spoke to griff today, very very helpful guy can't thank him enough for giving me 10 minutes of his time. He's given me some pointers so I'll go from there.


Posted By: Clintos
Date Posted: 02 Oct 2014 at 14:02
My 2011 RSV4 Factory had the exact same problem but also developed in the that the bike would rev constantly between 1 and 2k rpm when started.  I informed the dealer who advised that this was a fault code and the bike had basically gone into limp home mode.....outcome?  a sticking servo motor on the exhaust which was replaced under warranty and problem solved!
 
Hope that helps 


-------------
Now that..........aint slow!



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