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hello guys, my name is Andrea and I write from Italy. I bought a 2011 Honda CRF450, 4 hours and I noticed that the engine oil level rises dramatically in a few minutes of use. I found gasoline in the oil, easy to understand by unmistakable smell, and to change density oil. I changed my oil and tried again. nothing continues to rise. I thought that a sensor does not work and send more gas stations than necessary. all sensors (air, water and pressure seem to work). I tried a different brand of oil (Motul, Repsol, Castrol), and tried to change the density (10-40, 15-50) now have 14 hours, and the oil continues to rise. some of you can help me?

andrea romano
[email protected]

When you first noticed that it happened, you should have taken it back to the dealer. What's happening is the fuel injector is leaking and the fuel is going into the cylinder past the rings and into the oil. There's not much you can do besides change the injector, so you need to contact the dealer you bought it from. It needs a new injector and that's the only fix. It won't stop leaking. Not real common, but not unheard of either.

Hello. I brought the bike where I bought it, but honda-Italy says that the problem can not be resolved. I only got advice not to drive to limit and try to close a portion of the radiator. I do not find an answer to give to a customer who has paid a € 8500 bike.
fuel injector, I packed, I brought in bosh center for verification. no leaks, no deposits, no defects spray. I still run ultrasonic cleaning and reassembly. but nothing, yet gasoline in oil.

andrea

I've tried the same thing and I can tell you that you're going to have to replace that injector. Forget what they said about it being fine, it's not.

also I have imagined that it was leaking injector, during the week when at rest in the garage. small leaks from the injector, spend time in the piston and end up in the engine. but to me it happens differently. I have also tried to change the oil on the track, come in for a new run of 15 minutes and already found oil up. Therefore I do not think the injector leaking. you have had the same problem and have solved by changing injector? thanks for answers

andrearrr wrote:also I have imagined that it was leaking injector, during the week when at rest in the garage. small leaks from the injector, spend time in the piston and end up in the engine. but to me it happens differently. I have also tried to change the oil on the track, come in for a new run of 15 minutes and already found oil up. Therefore I do not think the injector leaking. you have had the same problem and have solved by changing injector? thanks for answers

Yes. Actually have had a few. Me and another one of my kids friend bought a 09 450 2 days apart. I run nothing but pump 93 octane fuel. The other kid runs VP fuel because he has a sponsorship and gets in for next to nothing. His buddy started having the same issue with fuel in the oil after about 20 hrs. My kid was down for a few weeks with a minor injury so we pulled the injector and fuel tank off my kids bike and put it on his buddies. I didn't want the VP fuel touching my injector just incase that was what caused it. Problem solved and no fuel in the oil. I don't think it was the VP fuel that caused the problem because once they put a new injector in it, they continued to run the VP fuel and no issues after that. I've replaced a few 2010 250's as well and it solved the problem.

Are you using a one way gas cap vent tube? If pressure builds in the tank it can force fuel through the pump.

This has been an issue Honda has been tracking for awhile. Here MXA ask the experts:

http://www.motocrossactionmag.com/Main/ ... -4149.aspx

I'd say you are getting more than the allowable 15% from your description and concern. I would continue to push your dealer for resolution. First, change the injector on Honda's dime if you can. Second, until that happens, keep an eye on it and change the oil A LOT!!!

Hello everyone. no I'm not using the tank vent pipe. all like the series. Here in Italy there have been many cases, and who has changed the injector did not solve the problem.

I'm dealing with an 11 450 right now with the same issue. 18 hrs on the bike. I don't have the bike in my posession, but I'll let you know what's going on with it soon.

124 wrote:This has been an issue Honda has been tracking for awhile. Here MXA ask the experts:

http://www.motocrossactionmag.com/Main/ ... -4149.aspx

I'd say you are getting more than the allowable 15% from your description and concern. I would continue to push your dealer for resolution. First, change the injector on Honda's dime if you can. Second, until that happens, keep an eye on it and change the oil A LOT!!!

Interesting write up. I spoke to my friend that's having the problem with the 11 450 and he doesn't think that it's more than 15%. He rides the hell out of the bike, so by the looks of the write up, maybe some of the fuel is being burned off by way of evaporation. Still scares me when you know that it's thinning the oil.

Charlie C wrote:

124 wrote:This has been an issue Honda has been tracking for awhile. Here MXA ask the experts:

http://www.motocrossactionmag.com/Main/ ... -4149.aspx

I'd say you are getting more than the allowable 15% from your description and concern. I would continue to push your dealer for resolution. First, change the injector on Honda's dime if you can. Second, until that happens, keep an eye on it and change the oil A LOT!!!

Interesting write up. I spoke to my friend that's having the problem with the 11 450 and he doesn't think that it's more than 15%. He rides the hell out of the bike, so by the looks of the write up, maybe some of the fuel is being burned off by way of evaporation. Still scares me when you know that it's thinning the oil.

Absolutely, I wouldn't accept Honda's response. I only posted the one link I found but there are many more complaints, starting with the 09'. It appears some bikes worse than others. First course of action would be pushing my dealer for injector replacement.

124 wrote:

Charlie C wrote:

124 wrote:This has been an issue Honda has been tracking for awhile. Here MXA ask the experts:

http://www.motocrossactionmag.com/Main/ ... -4149.aspx

I'd say you are getting more than the allowable 15% from your description and concern. I would continue to push your dealer for resolution. First, change the injector on Honda's dime if you can. Second, until that happens, keep an eye on it and change the oil A LOT!!!

Interesting write up. I spoke to my friend that's having the problem with the 11 450 and he doesn't think that it's more than 15%. He rides the hell out of the bike, so by the looks of the write up, maybe some of the fuel is being burned off by way of evaporation. Still scares me when you know that it's thinning the oil.

Absolutely, I wouldn't accept Honda's response. I only posted the one link I found but there are many more complaints, starting with the 09'. It appears some bikes worse than others. First course of action would be pushing my dealer for injector replacement.

I agree 100%! My buddy in Cali that is having this injector issue has been pretty lucky dealing with the local dealer he bought the bike from. They are having to get Honda to approve everything, but he's been pretty successful so far. I'd keep pushing for Honda to replace the injector and I wouldn't back off.

not believe it, but covering the radiators partially (about half each), the problem is not array must be checked more. Here with me now, the air temperature is 6-10 degrees C (42 - 50 ° F). I studied the PGM-FI fuel injection system makes the carburetor air / fuel control is achieved by means of sensors, air, water, pressure and engine rpm. I checked the sensors one by one and all seem to work fine. In fact I have no signal flashing MIL. Then I thought that probably, our bikes have a fixed cooling system that cools the same in summer and winter. our bikes do not have a thermostat. so I thought that if the water temperature is too cold, the ECU always invites to grease the engine to warm it. From there, the passage of too much fuel in the crankcase.
incredible. but I think that is not the final solution

I totally understand what you're saying, but while it's running is not when the fuel is leaking out of the injector and entering the cylinder causing it to run past the rings and contaminate the oil. The problem occurs when the bike is not running.