2009 CRF450 Problem

jeffseid
Profile picture for user jeffseid
Posts
126
Joined
9/9/2008
Location
Woodcliff Lake, NJ, USA
jeffseid
Edited Date/Time 12/25/2012 7:23pm
Have a 09 CRF450, bought it a year ago and have done all the regular maintenance. Was riding on Sunday and the motor was running perfect as it always has for me and then I stopped for a break. I then went back out and the power randomly started to cut out. I ended up calling it a day because it was nearing the end anyways, but I did a quick check to look and see if all the connection were good and they appeared to be. Anyone have this problem before? As I said before, the proper maintenance has been done, including air filter, oil filter, top end etc. Also, I DID NOT leave the choke on, so that can be ruled out. Really came out of nowhere so any guidance would be appreciated before I bring it into my shop and let the bills start to pile up.

Thanks in advance.
|
xnationalwrench 10/25/2010 11:23am
10/25/2010 11:23am
Spark, Fuel, Compression. Check spark 1st (easiest)
dbarrett231
Profile picture for user dbarrett231
Posts
174
Joined
4/27/2010
Location
Hesperia, CA, USA
dbarrett231 10/25/2010 9:17pm
10/25/2010 9:17pm
its fuel injected so make sue everything is fine there, idk about hondas but my rmzs fuel mapping loves to burn out then the power cuts out and then eventually the bike shuts off, and i have to replace the fuel mapping plug
davis224
Profile picture for user davis224
Posts
7507
Joined
8/15/2006
Location
Cornland, IL, USA
Fantasy
161st
davis224 10/25/2010 9:26pm
10/25/2010 9:26pm
We've replaced several honda fuel pumps. If you know someone who has the proper tools test the fuel pressure. Or if someone has the same bike ask if you can swap parts to test it out.

The Shop

See All »
biasion
Profile picture for user biasion
Posts
24
Joined
4/12/2008
Location
Milano, IT
biasion 11/3/2010 12:52pm
11/3/2010 12:52pm Edited Date/Time 11/3/2010 12:55pm
you need change fuel pump, i always use a cloth to filter the benz
Jujji
Profile picture for user Jujji
Posts
69
Joined
10/4/2010
Location
USA
Jujji 11/3/2010 1:55pm
11/3/2010 1:55pm
i suspect the fuel pump or filter as well. you can test it most likley by allowing it to fill a beaker of some sort and the spec wll be so many CC's of fuel for so many seconds operating.
rmgsxr
Profile picture for user rmgsxr
Posts
544
Joined
4/1/2008
Location
Oak Grove, MO, USA
rmgsxr 11/6/2010 8:02am
11/6/2010 8:02am
Fuel filter and I have also replaced two stators recently.

Had a customer that had one do what you are talking about. I brought it to the shop, checked fuel flow, checked electrical and decided it was stator. Put new stator in it and he rode the next weekend and it started acting up. Brought it back and put new fuel filter in it and it fired up and ran good. Figured I would put the old stator back in because it seemed to be fuel afterall. Got the old stator back in and it wouldn't start. Put the new stator back in and it started. So he had stator issue and fuel filter both. Has run fine since then. Had another one with starting issues and did the fuel filter. When you cut the filter open it will be gray and nasty looking. After putting the filter in it started. Went to the track and it wouldn't start. Put a new stator in it and it started. Went the next weekend fired up fine, ran good and then the rod went.
biasion
Profile picture for user biasion
Posts
24
Joined
4/12/2008
Location
Milano, IT
biasion 11/6/2010 12:56pm
11/6/2010 12:56pm
when the flywheel is too hot will damage the magnet and not a good start to a minimum
champ72
Profile picture for user champ72
Posts
2
Joined
8/18/2012
Location
genova, GE, IT
champ72 8/18/2012 10:53am
8/18/2012 10:53am
biasion wrote:
when the flywheel is too hot will damage the magnet and not a good start to a minimum
hi everyone!!

really high temp can damage flyweel??i have a 2009 for supermoto race,and i have serious problem to start up the bike,i try to change everything ,but it start only when it wont.
someone can help me? please,i don't khow how to try....
HenryA
Profile picture for user HenryA
Posts
3784
Joined
12/29/2011
Location
Stockholm, SE
HenryA 8/21/2012 10:01am
8/21/2012 10:01am Edited Date/Time 8/21/2012 10:01am
biasion wrote:
when the flywheel is too hot will damage the magnet and not a good start to a minimum
champ72 wrote:
hi everyone!! really high temp can damage flyweel??i have a 2009 for supermoto race,and i have serious problem to start up the bike,i try to change...
hi everyone!!

really high temp can damage flyweel??i have a 2009 for supermoto race,and i have serious problem to start up the bike,i try to change everything ,but it start only when it wont.
someone can help me? please,i don't khow how to try....
Is the bike bone stock? How many hours in it?
Joe Gregory's Race Tech 12/25/2012 11:08am
12/25/2012 11:08am
OK boyz As I found on a EFI the pump inside the tank the O rings]die out ,and you lose psi to the inj sys,and the turd just pops and bangs ,least most not it just piss you off.
tmauto769 12/25/2012 1:24pm
12/25/2012 1:24pm Edited Date/Time 12/25/2012 1:26pm
xnationalwrench wrote:
Spark, Fuel, Compression. Check spark 1st (easiest)
Joe Gregory's Race Tech wrote:
some kids have no com sence it all basicWoohoo
maybe not, but at least he has some basic writing skills. WTF did you just say? Nah, never mind I don't wanna know, just STFU noob!

OP, it is either the fuel pump or filter.
Brad460
Profile picture for user Brad460
Posts
4496
Joined
5/15/2012
Location
Richfield, WI, USA
Fantasy
260th
Brad460 12/25/2012 7:23pm
12/25/2012 7:23pm
Joe Gregory's Race Tech wrote:
OK boyz As I found on a EFI the pump inside the tank the O rings]die out ,and you lose psi to the inj sys,and the...
OK boyz As I found on a EFI the pump inside the tank the O rings]die out ,and you lose psi to the inj sys,and the turd just pops and bangs ,least most not it just piss you off.
Can we get a translator in here?! Wtf are you trying to say?

Post a reply to: 2009 CRF450 Problem