CBR900RRX fuel issue - Honda Motorcycles - FireBlades.org
Honda FireBlade Discussion of the Honda CBR 900RR, Honda CBR 929RR, Honda CBR 954RR, and Honda CBR 1000RR Motorcycles.

User Tag List

Reply
 
LinkBack Thread Tools
post #1 of 21 Old 09-03-2012, 10:59 AM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
CBR900RRX fuel issue

Hi guys, after some pointers on a fuel issue with my 99 blade, bought it a couple of months ago and on the run home it was missing a bit and firing on 3 cylinders for the 1st few miles but seems to clear after fresh fuel fill up and a bit of throttle action, i think it had been stood for a while un-used.
Got it back and it seems to run much better after the blast home, i got to work on it and removed the tank / airbox / coils / leads and replaced the plugs with iridium ones and a K&N filter, i also put some Wurth fuel stabiliser/cleaner in the tank and filled with Shell V power 98 octane.
I rode it in on the commute to try it and it seems ok till i gave it the beans and it pulls up at high rev and feels like its restricted with a bit of high speed surging to boot feels a bit like fuel restriction or maybe air ? but with the K&N it should be getting loads of air.
I then had an issue with the Datatool immobiliser which knocked the bike out for a few weeks till i sorted it. Went out for a run on Sat and again very hesitant at high revs and holding back, put some standard fuel in and gave it some beans but still not giving full power, by the time i was on the last stretch of the run home it seems to be getting better but still not running clean at high revs.
Someone suggested it maybe running lean at high revs i also think i remember reading somewhere they dont like K&N filters ?
Any help would be appreciated, ta

just bikes for me ta
bigden is offline  
Sponsored Links
Advertisement
 
post #2 of 21 Old 09-03-2012, 11:15 AM
Global Moderator
 
bladeracer's Avatar
 
Join Date: 11-14-2003
Location: Perth, WestOz
Age: 53
Posts: 32,034
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Reputation Power: 230
                     
Re: CBR900RRX fuel issue

Quote:
Originally Posted by bigden View Post
Hi guys, after some pointers on a fuel issue with my 99 blade, bought it a couple of months ago and on the run home it was missing a bit and firing on 3 cylinders for the 1st few miles but seems to clear after fresh fuel fill up and a bit of throttle action, i think it had been stood for a while un-used.
Got it back and it seems to run much better after the blast home, i got to work on it and removed the tank / airbox / coils / leads and replaced the plugs with iridium ones and a K&N filter, i also put some Wurth fuel stabiliser/cleaner in the tank and filled with Shell V power 98 octane.
I rode it in on the commute to try it and it seems ok till i gave it the beans and it pulls up at high rev and feels like its restricted with a bit of high speed surging to boot feels a bit like fuel restriction or maybe air ? but with the K&N it should be getting loads of air.
I then had an issue with the Datatool immobiliser which knocked the bike out for a few weeks till i sorted it. Went out for a run on Sat and again very hesitant at high revs and holding back, put some standard fuel in and gave it some beans but still not giving full power, by the time i was on the last stretch of the run home it seems to be getting better but still not running clean at high revs.
Someone suggested it maybe running lean at high revs i also think i remember reading somewhere they dont like K&N filters ?
Any help would be appreciated, ta
Have you checked the vacuum line to the fuel tap isn't sucking fuel?

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
bladeracer is offline  
post #3 of 21 Old 09-03-2012, 12:38 PM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Tell me more Sir, when i put it all back together it started and ran for a few seconds then cutout, wouldn't re-start, i checked everything and found a pipe coming off the rear of the cyclinder to the fuel tap was not connected, once connected it fired.
How do i check for the vacuum line sucking fuel ? presume if i pull it off and no fuel comes out its working fine ? cheers

just bikes for me ta
bigden is offline  
Sponsored Links
Advertisement
 
post #4 of 21 Old 09-03-2012, 3:43 PM
 
Join Date: 04-25-2009
Location: gravesend, kent.
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Hi, sounds like air/fuel mixture problem,Clean the carbs, also is the K&N air filter dry/oiled over oiled? Whats the mileage if high You can try a compression test, engine hot and full throttle just to see the condition of the engine!
BLOB748 is offline  
post #5 of 21 Old 09-03-2012, 4:25 PM
 
Join Date: 03-19-2008
Location: kent,uk
Posts: 125
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2 Post(s)
Reputation Power: 13
   
Re: CBR900RRX fuel issue

This sounds like the problem I had make sure your filter in the tank is clean as on main tank the fuel is filtered and on reserve its not so crap gets in the system on reserve and clogs the system also I ran a inline filter and it woulnt run properly there's not enough fuel pressure at gravity to get a decent flow the head of fuel is very close to the float bowls level no such problem with early blades as they had fuel pumps this is why the fuel lines are on the large side to allow more flow
warloks38 is offline  
post #6 of 21 Old 09-03-2012, 6:15 PM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Quote:
Originally Posted by BLOB748 View Post
Hi, sounds like air/fuel mixture problem,Clean the carbs, also is the K&N air filter dry/oiled over oiled? Whats the mileage if high You can try a compression test, engine hot and full throttle just to see the condition of the engine!
Hi, k&n is box new and bike has only done 16k

just bikes for me ta
bigden is offline  
post #7 of 21 Old 09-03-2012, 6:21 PM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Quote:
Originally Posted by warloks38 View Post
This sounds like the problem I had make sure your filter in the tank is clean as on main tank the fuel is filtered and on reserve its not so crap gets in the system on reserve and clogs the system also I ran a inline filter and it woulnt run properly there's not enough fuel pressure at gravity to get a decent flow the head of fuel is very close to the float bowls level no such problem with early blades as they had fuel pumps this is why the fuel lines are on the large side to allow more flow
I'll look into the filter thing, only thing is it ran pretty good once it cleared its throat on the blast after picking it up, so i go and fit expensive plugs and filter and it runs like ****, maybe I should have left it at an oil & filter change. Very frustrating when you service it and it run worse !

just bikes for me ta
bigden is offline  
post #8 of 21 Old 09-04-2012, 3:11 PM
 
Join Date: 04-25-2009
Location: gravesend, kent.
Posts: 47
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

The K&N air filter should be oiled with k&N filter oil, but do not over do it!
BLOB748 is offline  
post #9 of 21 Old 09-04-2012, 7:38 PM
 
Join Date: 12-09-2007
Location: Manchester UK
Age: 71
Posts: 931
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Reputation Power: 51
                     
Re: CBR900RRX fuel issue

I'll go with the K+N being the culprit. Standard air filters really are the best way to go. Check that you also have the front snorkels fitted to the airbox. I know that you can mod these but it also needs quite some re-jetting. After trying a lot of induction mods, I came to the conclusion that Honda got it pretty well right on the carby's (pity about their early FI efforts).
jdugen is offline  
post #10 of 21 Old 09-04-2012, 11:01 PM
 
Join Date: 11-13-2011
Location: Cape Town, South Africa
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Hi there,

It sounds to me like this bike is running lean. I had the same symtoms on my 99 model after installing a pipercross airfilter. (and I had already thrown away my oem filter) So I installed a stage1 Dynojet kit and now it pulls harder than ever!

[IMG][/IMG]

Pipercross Airfilter
Stage 1 Dyno Jet Kit
Laminex Headlight
MRA Screen
Mirror bracket eliminator mod
Yoshimura shorty
gpgold is offline  
post #11 of 21 Old 09-06-2012, 5:50 AM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

I'll fit a standard filter and see if things improve, I had a similar issue back in 98 on my Ninja 900, got a free air filter with oil at hein geriche, bike ran like a pig till I replaced the free one with oem, thing that was a lack of air issue though

just bikes for me ta
bigden is offline  
post #12 of 21 Old 09-12-2012, 6:36 AM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Update, spoke to local Honda dealer who put me onto a local tuner who used to specialise in carb blades, soon as i mentioned symptoms and the K&N he said straight away fit a genuine Honda filter its running too lean. He says they run a bit lean anyway and if your filter is a bit mucky all the better i said what just like the one i pulled out , £40 down the shitter then

just bikes for me ta
bigden is offline  
post #13 of 21 Old 09-12-2012, 9:35 AM
 
Join Date: 11-13-2011
Location: Cape Town, South Africa
Posts: 35
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

Hi bigden,

Just consider this for a second. If you have upgraded the airfilter to improve the performance, then you are already half way there and, as you say, getting rid of the K&N is money down the shitter. Now I know installing a Dyno-Jet kit is gonna cost you a few extra quid but you will immediately notice an improvement in performace. The bike will pull smooth and hard. The kit will get rid of the hesitation and combined with the K&N, it will give you a few extra horses as well

[IMG][/IMG]

Pipercross Airfilter
Stage 1 Dyno Jet Kit
Laminex Headlight
MRA Screen
Mirror bracket eliminator mod
Yoshimura shorty
gpgold is offline  
post #14 of 21 Old 09-12-2012, 10:06 AM
Global Moderator
 
bladeracer's Avatar
 
Join Date: 11-14-2003
Location: Perth, WestOz
Age: 53
Posts: 32,034
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 8 Post(s)
Reputation Power: 230
                     
Re: CBR900RRX fuel issue

Quote:
Originally Posted by gpgold View Post
Hi bigden,

Just consider this for a second. If you have upgraded the airfilter to improve the performance, then you are already half way there and, as you say, getting rid of the K&N is money down the shitter. Now I know installing a Dyno-Jet kit is gonna cost you a few extra quid but you will immediately notice an improvement in performace. The bike will pull smooth and hard. The kit will get rid of the hesitation and combined with the K&N, it will give you a few extra horses as well

You can do all that without having to cripple it with a K&N - stick with the OEM air filters.

"I won't forget that ride for a while. Maybe you're right. Living fast might be worth the final crash. Maybe that's the secret you fliers know." - Flight of the Intruder
bladeracer is offline  
post #15 of 21 Old 09-13-2012, 7:15 AM Thread Starter
 
Join Date: 06-27-2012
Location: Warwickshire, England
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Reputation Power: 0
 
Re: CBR900RRX fuel issue

£118 for a stage one apparently, i will do some research

just bikes for me ta
bigden is offline  
Reply

  Lower Navigation
Go Back   Honda Motorcycles - FireBlades.org > Honda Motorcycle Models > Honda FireBlade

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda Motorcycles - FireBlades.org forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
A valid e-mail address is REQUIRED. You will not have access to any site features until you activate your account using the activation e-mail that is sent to this address.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
Fuel issue? Farfugnugin Honda FireBlade 1 05-08-2012 3:37 AM
fuel issue??? redneck Honda Naked Sportbikes 4 05-31-2011 2:33 PM
Fuel pump issue. Chris Medellin Honda Cruisers 2 02-26-2011 10:42 PM
Fuel Pump issue, Plz help Chris Medellin General Discussion 4 02-20-2011 2:21 PM
Fuel leak issue, help please! robbied Honda FireBlade 5 02-05-2007 7:13 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome