Please help! Fuel pump woes

  #1  
Old 01-19-2015, 01:23 AM
subyman1440's Avatar
Senior Member
Thread Starter
Join Date: Dec 2011
Location: San Francisco
Posts: 208
Default Please help! Fuel pump woes

I just picked up a 2004 CBR600RR with 37k miles. Ran great when I bought it. Then it took a dump on me. The fuel pump started making weird noises and the bike would not rev above 7k rpms. I pulled over and I heard a really loud hissing sound from the gas cap. I unlocked it and then "boom" I got gas everywhere. I ran the bike with the gas cap off and there was a constant flow of air bubbles coming from the stem of the pump. Also, the pump makes a much weaker sound. The pump sounds strong in the morning, but after a few hours of riding, the pump sounds like it's struggling to pump. I pulled the pump out of the bike and the whole fuel pump assembly was bent/snapped. Could this be the problem?
 
Attached Thumbnails Please help! Fuel pump woes-photo-30-.jpg  
  #2  
Old 01-21-2015, 08:36 PM
Conrice's Avatar
Retired Super Moderator and Fighterer
Join Date: Nov 2006
Posts: 6,148
Default

It sounds to me like you have vapor-lock. Check your breather tubes. Thats going to put strain on any pump, and its something that overnight would go away and then comeback with the engine running.


But, the pump being like that isn't ideal either. Do you have any pics of the tank, inside where the long tubes run up to the cap?
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
rocklizzard91
CBR 600F
11
10-05-2011 08:34 AM
zblad
F4i - Main Forum
3
12-05-2008 01:14 AM
Butsky
CBR 600F3
23
09-03-2008 01:54 AM
Geno
F4i - Main Forum
1
09-08-2007 06:30 PM
mpbigham
CBR 600F4
6
03-02-2007 08:13 AM


Thread Tools
Search this Thread
Quick Reply: Please help! Fuel pump woes


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.