stalling, low idle, hesitation, HELP PLEASE - Honda RC51 Forum : RC51 Motorcycle Forums
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 05-11-2014, 02:10 PM Thread Starter
Junior Member
 
Join Date: May 2014
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
stalling, low idle, hesitation, HELP PLEASE

I am out of ideas. My sp1 is completely unrideable. It is tough to start, idles rough, ignores throttle input, and dies. The most obvious symptom is that it ignores throttle input. From idle if I slowly roll on the throttle, the idle goes from slightly rough to erratic and the rpm's do not change in the least. I can usually roll all the way to full throttle without the rpm's making it over 1500. If I very carefully tease the throttle I can get it to rev and have tried to ride it. It is jerks like crazy and has little to no power. I could barely get it over 20mph. 2 days ago it ran fine, easily pulled the front wheel in 2nd and had no issues that I noticed.
jwest is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 05-11-2014, 03:33 PM
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Download the service manual

http://www.rc51.info/index.php?page=service

and check your FPR

https://www.rc51forums.com/forums/sho...&highlight=fpr


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #3 of 6 (permalink) Old 05-11-2014, 04:22 PM Thread Starter
Junior Member
 
Join Date: May 2014
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I have the manual printed out and it was no help. The FPR lines are connected.
jwest is offline  
 
post #4 of 6 (permalink) Old 05-11-2014, 04:48 PM
Lifetime Premium
 
MakisRC51's Avatar
 
Join Date: Jan 2012
Location: Korinthos, Greece
Posts: 3,239
Mentioned: 15 Post(s)
Quoted: 77 Post(s)
Quote:
Originally Posted by jwest View Post
I have the manual printed out and it was no help. The FPR lines are connected.
Does it leak fuel from it's vacuum nozzle when you pull the vacuum hose off of it?


My Íhlins Project: https://www.rc51forums.com/forums/showthread.php?t=6033
Quote:
Originally Posted by SubSailor View Post
Congratulation to MakisRC51 for winning the 2014 Bike Of The Year Contest!
MakisRC51 is offline  
post #5 of 6 (permalink) Old 05-11-2014, 05:00 PM Thread Starter
Junior Member
 
Join Date: May 2014
Posts: 4
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
It does not.
jwest is offline  
post #6 of 6 (permalink) Old 05-11-2014, 10:01 PM
Senior Member
 
jondog9's Avatar
 
Join Date: Aug 2010
Location: Northern CA
Posts: 8,653
Mentioned: 15 Post(s)
Quoted: 317 Post(s)
My first thought is fuel pressure regulator. Everything you said sounds like it.
Did you turn the key on to prime the pump when the vacuum hose was disconnected?
A faulty fpr doesn't always leak.
Has the bike sat for a while by chance?
Do you have any codes flashing?

John, 2000 RC51 #000100

jondog9 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 Motorcycle Forums 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
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 On
Pingbacks are On
Refbacks are On

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