I'm sure there are quite a few of these threads, especially this time of year, but I couldn't seem to find a good answer in my search.

So I went to fire up the bike (2003 cbr600rr) after winter storage and it won't fire. Battery is fully charged and it turns over, but it won't start up. When I tried yesterday, I thought I heard it almost fire a few times but it never started and was VERY brief. I've checked all the air intake and muffler and everything is clear. Today we emptied the gas and put fresh gas in and that didn't work either.

When I put it away for the winter, all I really did was change the oil and put stabil in with a full tank of gas (and let it run for a bit to get it through the system). That's pretty much all I did last winter as well with a ninja 250 and that started right up after winter. Anybody got any ideas before I take it in to get it figured out?

 

Need to figure out if its fuel or spark.

Pull one of your spark plugs, leave it in the coil, touch to frame (AWAY FROM CYLINDER) and give it a quick crank. Should get a nice blue spark.

Got a spark? Then you have a fuel related problem.

Start there because thats the easiest way to start tracking down the problem. Report back.

Even though you removed the gas from the tank doesnt mean its not still in the fuel lines.

 

Yep, you have to confirm fuel and fire first.

I wouldn't think that letting it sit over the winter would make the gas unusable, especially since you ran stabilizer through it.
Heck, I've used 4yr old gas with no stabil in another motor and it fired right up.

 

I didn't think it would either, but I figured it was easy to do (and we put the gas into the car later on so I didn't even really lose any gas haha).

We checked the spark plugs and they work fine. Unfortunately, I had to go back to school (1.5 hours away) so it's going to be until at least next weekend until I can get back to the bike. Thanks for the answers so far though!

 

Well that narrows things down. It could be fuel pump, fuel relay (if you have 1), pinched fuel line...etc.

Next weekend when you get back to the project try to see if your fuel pump is actually whinding up. That would let you know if fuel is actually entering the fuel rail. Then be sure there are no pinched fuel lines.

 

So a buddy of mine (who's slightly more mechanically inclined than I) were looking at it the other weekend and couldn't figure it out and I ended up bringing it in to a shop that I've had good experiences with before.

I brought it in and they are saying that I have no compression. They said it would be about $1100 in labor plus parts to fix (Being a college student, that is quite a bit of money for me). I don't know a whole lot about this kind of stuff, but I'm curious if it makes sense for that to be the problem when it ran perfectly fine and started perfectly before winter. I also got it checked out at this shop when I bought it last summer and they found nothing wrong. I'm just a little bit skeptical as to whether this even makes sense cause in my head it doesn't, but again, I don't know a whole lot.

 

dont do that man try to figure it out on your own first... im sure someone on here could help you.. i bet the shop is just trying to scam u esp if ur bike worked fine before winter.... but i could be wrong

i would certainly not pay a shop to do it no matter what tho kus there are plenty of ppl here who can help you become mechanically inclined... if you can follow instructions, have patience and have the right tools you are mechanically inclined with the help of this forum and the rest of the internet

 

I'm having the same problem, on a bike I just bought (2005 honda cbr 600rr) won't start, the previous owner told me that it was the fuel pump but is not, fuel pump is not turning on when ignition key is turn so i checked it direct and fuel pump does comes on, only them bike start. next step is to find out way the fuel pump doesn't go on when key is turned, I will check fuel relay and all connections today if anybody has any ideas let me know it will be much appreciated.

 

^bas

 

Is the cdi