[dabrowski]

Hey guys, avid crfsonly.com follower from Australia here...

just brought and picked up my new 2010 crf250r and couldnt be happier. My query i have is about the fuel system maintanence.

when i had the 07 crf, i used to drain the carbie bowel from fuel to minimise deposits aftre each ride....but now with the 2010 injected bike, what kind of care should be taken after each ride weekend? Does the fuel pressure need to be released? is it possible to release fuel so it is not settled in the injected or fuel lines? Am i even making sense? lol

I know there is a connector for relieving fuel pressure, but i dont really see the point of doing this if i ride once a week.

thanks

[motosicko]

There are a few problems circulating around about the injectors leaking and filling the crankcase with fuel. No one has really pinpointed why this is happening. Most theories are that it is due to dirt settled in the bottom of the filter in the fuel pump, thus restricting the fuel pump delivering the correct pressure to the injectors, and that it happens while the bike is parked. Also don't want to run one of those one way valves on your tank breather line, they have been known to pressurize the tank when bike is parked in a hot area. I haven't had any problems yet, only have 12 hrs on mine, but not taking any chances, and have put a Pro Fill filter in mine to make sure. The company making them is in Australia, so easy for you to get one. http://www.profill-australia.com/

It drives me crazy why Honda didn't put some kind of fuel shutoff on these bikes.

[dabrowski]

Yeh i totally agree regarding the shut off. But then again, modern day cars dont need a fuel tap, so maybe the same theorie applies to these bikes. On a brighter note, i've just purchased one of these filters from profill. will let people know how it goes.

thanks.

[dabrowski]

Well, i purchased the pro-fill filter and i must say im very impressed. I have run 1 full tank through the filter, and could not believe the crap that was filtered. Already i have found small blue coloured particles (unsure what it is), and what looks to be hair....possibly pubic haha

i highly recommed the filter from pro-fill as it has multiple layers of filtering, and excellent construction. Get onto it, and dont clog your bikes with the crap from the fuel.

[dabrowski]

thought i would post some pics of the fuel pump, and pickup from the fuel tank for anyone interested

[motosicko]

Just though I'd add this Honda Service Bulletin.


Replacement fuel filters are now available for the fuel-injected CRF450R and CRF250R.

The newly available fuel filter for the fuel-injected CRF-R models is the same specification as the original equipment part. In 5 or 6 months this part will be superseded with a second generation filter with less restrictive straining, which should provide longer life during normal usage.

If you have a customer complaining of poor
engine performance, or describes a problem as
“like it’s running out of gas,” the likely cause is
a clogged fuel filter.

Before replacing the fuel filter, do some basic
troubleshooting first:
• Scan the ECM for stored DTCs, troubleshoot
any DTC(s) first.
• Do a fuel pressure test. If the fuel pressure is
abnormal, troubleshoot the cause.
• Perform a fuel flow inspection. Troubleshoot
other possible causes of poor fuel flow
before replacing the fuel filter.
Please advise your customer that fuel quality as
well as improper fuel storage/filtration can affect
fuel pump and filter performance and longevity.



REPLACEMENT PROCEDURE CRF250R and CRF450R:
1. Remove the fuel pump from the unit as outlined
in the appropriate Service Manual.

2. Check the fuel pump wires for loose connections
or damage. Disconnect the fuel
pump wires from the fuel pump base as
shown in the photograph at the top of the
following column.

3. Check the hooks of the fuel pump unit
holder and tabs on the fuel pump base for
damage or discoloration. If the hooks and
tabs are damaged or discolored, replace
the fuel pump unit as an assembly.
Replace the fuel pump unit holder if the
gap between the hook and tab is more
than 1.0 mm (0.04 in).
4. Release the hooks of the fuel pump unit
holder from the slots on the fuel pump
base tabs while pushing the holder against
the base and slightly spreading the base
tabs.

5. Remove the fuel pump unit holder assembly
from the fuel pump base. Remove the
O-ring.

6. Check the fuel filter clip for looseness,
deformation, or damage and replace if
necessary.
Slightly turn the fuel filter clockwise and
release its hook from the joint boss of the
fuel pump assembly. Remove the fuel filter.
Be careful not to damage the hook, boss, and
clip. If the clip is damaged or loose, replace it.

7. Clean the fuel pump joint area with compressed
air.
Do not blow compressed air directly into the
feed pipe or suction hole.
Install a new fuel filter onto the fuel pump
assembly joint.
Turn the filter counterclockwise until its
hook is completely seated on the joint
boss.
Be careful not to damage the hook, boss,
or clip.

8. Apply a small amount of silicone grease to
a new O-ring. Install the O-ring to the fuel
pump base.
Install the fuel pump unit holder assembly
into the fuel pump base while aligning its
hooks with the slots in the pump base
tabs.
Be sure that the hooks are completely seated
in the grooves.
Replace the fuel pump unit if the gap between
the hook and tab is more than 1.0 mm (0.04 in).

9. Connect the fuel pump wires to the fuel
pump base terminals as shown.

10. Reinstall the fuel pump as outlined in the
appropriate Service Manual.

11. Start the engine and check for fuel leaks.


NOTES:
• Thoroughly clean the inside of the fuel
tank with fresh fuel before installing the
fuel pump.
• Be sure to replace the fuel hose joint
retainer when installing the fuel tank.



CRF-R Filter Set
Includes the fuel filter, small
outer O-rings.
P/N: 06160-MEN-A30

[dabrowski]

Very interesting read! lucky we brought the pro-fill filters ey Motosicko!

Very nice find and hopefully will help somebody out in the near future.

[mxdad814]

Bike has 21 hrs. my son did 3 motos 25 mins. each everything was fine. Went to do 4th moto and it will not start. Things we have checked:

Valve clearance
all electrical connections
kill switch
never ran gas tank low or overfilled

The gas tank vent tube you can blow air in and suck air out. At first you could not blow air in until you sucked on the vent tube.
There is no gas to the motor.
The last 3 air cleaner changes we noticed what looks like oil in the airbox boot between the air filter and the throttle body, is this a bad fuel injector?

[mxdad814]

Can you remove the fuel pump and change the filter, then reinstall and start the motor? Do you need to pressurize the fuel system? Any special service tools needed?

[motosicko]

The pump will pressurize when the stator builds electricity as you kick start. May take 6 or more kicks till it fully pressurizes.

[mxdad814]

It appears that the fuel pump motor is shot! I have 12volts to the pump when I kick it over, but no fuel out of the pump. I checked continuity across the two terminals on the motor and got 0 continuity. Has anyone else had fuel pump failure? We only have 21 hrs on it.
I wonder if the pump was slowly going not producing 50 psi would this explain the fuel injector leaking and seeping gas into the crankcase? How about the oil in the airbox boot? It seems that the last 3 rides it was hard starting and we had oil in the airbox.

[motosicko]

The oil in the air box issue isn't related to the fuel pump. Oil gets in there through the crankcase breather tube coming out of the valve cover. If you have ever laid the bike over on it's side or upside down, or have some sort of extreme pressure inside crankcase, the oil will travel through the breather and into the drain tube and airbox. Have you bled the fluid out of the drain tube? An Applied crankcase bypass kit is what I use to eliminate this problem.
http://www.crfsonly.com/catalog/product ... ts_id/1048

Have you replaced the fuel filter yet? That will stop the fuel pump from sending fuel.
Are you running a 1 way breather on the gas cap?

[mxdad814]

We run stock gas cap and vent tube. Pulled the pump,disassembled and found everything very clean including filter. While apart I put 12 volts direct to the pump and the pump did not work until I tapped on it. Turned pump off then back on and it would not run. There must be a bad spot somewhere. I will order a new pump tomorrow. The oil in airbox has been there the last 3 rides,air cleaner changes. We drain the breather tube after every ride, there is about 1.5 inches of gas/oil mixture in the tube. I thought I read somewhere that this occurs because of a leaking fuel injector. Thanks for all the advice.

[motosicko]

I haven't had to replace my filter, yet, but from what I've read you can't see the dirt in the filter till you cut it open. The dirt gets filtered through the inside layers. Definitely sounds like your pump is bad, and the injector needs replaced. I've been using a ProFill filter since I heard people were having this problem. Only ran about 2 gals of un-filtered fuel thru the bike. Now have 25 hrs. on it and all good so far. I picked up a spare filter and injector to keep on hand so when it does happen I'll be ready so we don't miss a race. Maybe a spare pump should be in my kit too. Let us know the outcome of your repairs.

[GlassfordMark]

Hey whats up guys, i had my 2010 CRF 250 for almost two years now. Latley i have been dealing with the fuel leaking into the crank case, but i just bought a new filter for it hoping that it works. But when i first got it i had a huge!! problem with it, my crank bearing blew in it costing me 700 dollars, just dont over rev them it sucks. but if anyone finds out more about this fuel problem please let know. But other then that the bike is amazing better then any other bike i have ever had. Thanks guys.