Recent Rough Starting

[Trickniner]

I have a 2007 CBR 600RR. It had been parked in my garage on a rear stand for exactly 1 month. It hadn't moved due to a flat rear tire. Yesterday I figured I would get the winter storage duties out of the way since I wouldn't be riding it anymore for the year. I pulled the lower fairing in preparation for changing the oil.

The problem came up when I tried starting the bike to warm it up for the oil change. It would crank and crank but nothing. It definitely smelled like it was getting fuel though so I figured it wasn't getting spark, but I couldn't figure out what could have caused it since nothing had changed since riding it a month ago other than the tire going flat and me pulling the lower fairing 5 minutes earlier. I kept trying to crank it over with the same result. I decided to drop the bike off the rear stand and let it chill out for a few minutes. I gave it another shot and it would start to sputter a few times. Eventually I was able to get it to turn over, I had to hold the throttle around 3k for a few seconds before it eventually settled in to a rough idle that smoothed out in another 30 or so seconds.

Just curious if anyone has any theories on what caused this. I am wondering if sitting on only the rear stand, being that it puts the bike in a slight pitch caused fluids (oil or something) to settle and foul the plugs as it seemed fix itself once I dropped it off the stand and let it sit flat. I had it on the rear stand a lot last winter, but I can't remember if I just let it sit completely untouched. Either way this has never happened before. If possible I'd like to avoid this happening again in case it ends up causing more serious (expensive) issues.

I don't know if it matters but the bike has a BMC filter, Yosh Slip on and PC5.

[butcher bergs]

Trickle charge the battery then try to start it.

[slammp]

Hold it upside down for about 30 seconds to drain everything out of the cylinders. Its just sludge settlement. Just get a couple friends to help you lift and flip it. The fire it up and let it go for about a full minute. You wont have anymore issues.

[Trickniner]

Thanks for the suggestion. I'll give it a shot if this happens next time.

I guess I was more asking to see if anyone has had this happen or heard of this happening to a bike sitting on a rear stand for a long stretch of time. I got the bike running and started it up yesterday without any issue, so it seems to have been a one time thing. I just wanted to avoid having this happen again if possible.

[OreoGaborio]

The rearstand had absolutely zero effect. Not a chance in hell.

Probably just a weak battery.

[Trickniner]

The rearstand had absolutely zero effect. Not a chance in hell.

Probably just a weak battery.

I don't think that was it. I had it on it's tender for a week leading up to this happening. The tender was showing the battery was charged, and when I was cranking it over, it wasn't having an issue at all. After about fifteen minutes of trying on and off, it eventually started off the battery too.

[OreoGaborio]

Okay. well it wasn't the rearstand, I can guarantee you that.

[RandyO]

It had been parked in my garage on a rear stand for exactly 1 month.

stale gas, what do you expect

[MikeyZ]

Oh Yes Yes the common rear stand voltage drain....

The rear stand comes in contact with the swingarm (who touches the frame etc..) Then the voltage from the battery is drawn out and transferred through the metal stand right into the floor!!!

Always insulate your stands with lots and lots of rubber!!!!

[RandyO]

Oh Yes Yes the common rear stand voltage drain....

The rear stand comes in contact with the swingarm (who touches the frame etc..) Then the voltage from the battery is drawn out and transferred through the metal stand right into the floor!!!

Always insulate your stands with lots and lots of rubber!!!!

insulating the radiator is more important
http://kalecoauto.com/index.php?main...products_id=35

[Murph]

Gas...ethanol sucks ass...I feel like a friggin chemist everytime I fill the bikes up...Statron,Stabil.....

[SSearchVT]

Start Bad Idea:

Use some starting fluid - the spray type. Make sure to buy a few of the big cans because there's no possible way to use too much. It works best if you spray it into the throttle bodies for a while before trying to turn it over... Either have a friend hold the starter button down or just tape it down while you spray more in...

End bad idea...

Or you could try charging the battery (or if you're in a hurry - and careful - jump start it) after changing the gas out...

[Awesome]

Fuck it dude, go bowling.