F2 Tech Tech Subsection (for any mechanical, repair, and DIY threads)

Wont start

Old Feb 7, 2012 | 07:26 PM
  #11  
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Ok- I watched your video. Sounded like you have a good hot battery. What you didn't show is if you had the choke on. with the choke on, you shouldn't have to be giving it throttle like you were while starting. Also - it never sounded like your bike was trying to hit at all, ever, in that video.

You also said you had the carbs cleaned - I'm assuming someone else worked on the bike? You need to make sure that the petcock is flowing fuel, and that the vacuum line was properly reattached to the tank, so I'm going to list some very simple things here - but all need to be checked:

1) Tank has gas in it.

2) Is petcock is turned on. (Arrow pointing down is "ON" - Up is "Reserve" - Middle is "Off") If your tank isn't slap full of gas - try putting it on Reserve, just in case fuel might be too low in the tank for the normal pickup.

3) Are you using the choke at all - didn't show it in your video. When carbs are cleaned, they may take a good while to fill back up enough to run. The choke helps this.

I uploaded this vid real quick of a cold start on my bike and the process I normally follow just now:
http://www.youtube.com/watch?v=pb06hOxKCBs


Assuming all of that is done, or didn't fix your problem

4) As the first responder in the thread mentioned - motors need Fuel, air, and spark to run. I'm assuming you didn't leave a rag on top of your carbs, so the air is probably ok. Fuel and spark can be tested pretty easy since your fairings are off. Crank the bike over for a few seconds like in your video. Pull either plug #1 (left most) or 4 (right side) and see if it is wet at all. It should be. If not, you have a fuel problem.

5) You said you put fuel/oil mix in - like Premix for a 2-stroke dirtbike or weedeater or boat motor? You might have fouled your plugs. Pull all 4 - make sure they are all NGK CR9EH9 or equivalent model plugs. Clean them up - or go buy 4 new ones - they're like $6 each. Before you do that - test that you've got spark on all 4 cylinders. Plug a sparkplug into each plug wire, and ground the plug to the frame. Bump the starter with the Run switch on. You should get a spark at the end of the plug.


Give all that a try and report back.
 
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Old Feb 8, 2012 | 05:04 PM
  #12  
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Originally Posted by titus sublett
Well I accidentally put gas and oil mixture in

This is probably your problem. Unless you put in some really thin 2-stroke mix (50:1 or higher gasil mixture) I'd bet this is your issue.

Remove the gas tank, and dump all the fuel out. Save it for your car perhaps. If you mix it in with a bunch of regular old gas you aught to be fine.

Once that is done, drain the float bowls on the carb. You can get to them without removing the carbs if you have a long enough flathead screw driver. Fairings will need to come off though.

As for the rectifier, that isn't the issue. A bike will run without a rectifier, it simply won't charge though. Now if you run the bike and it suddenly peters out to a slow and underpowered death... then you know where to look.
 
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Old Feb 8, 2012 | 07:37 PM
  #13  
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lmao this thread is ridiculous
 
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Old Feb 8, 2012 | 09:23 PM
  #14  
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Well I'm not sure how to check the plugs. But there was no fuel coming out of the tank at all.Is it supposed to be. Like I can tip it over and nothing comes out. But there is gas in it
 
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Old Feb 8, 2012 | 11:11 PM
  #15  
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How many hoses are connected from the engine to the petcock.

There should be 2.
 
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Old Feb 9, 2012 | 12:27 AM
  #16  
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Originally Posted by titus sublett
Well I'm not sure how to check the plugs. But there was no fuel coming out of the tank at all.Is it supposed to be. Like I can tip it over and nothing comes out. But there is gas in it

The petcock (the thing that lets fuel out of your tank) is vaccum operated. It won't let gas out unless there is vaccum from the engine.


I'm inclined to say you're in over your head at this point. Hit up a mechanic familiar with the F2's.
 
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Old Feb 9, 2012 | 07:33 AM
  #17  
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I think I know someone. I will report back and let yall know what was wrong
 
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Old Feb 9, 2012 | 12:32 PM
  #18  
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Originally Posted by titus sublett
I think I know someone. I will report back and let yall know what was wrong

This sounds like a really good ideal. I'm not trying to put you down or anything but if you don't know what you are doing, you will cause way more harm then good if you continue to work on the bike yourself. Please let someone else who knows bikes better work on it and save yourself the money in the long run. You really need some basic mechanic skills before your work on the bike. Not knowing how to check the plugs and not having a clue what the petcock is, says you don't have those. Let someone who knows what they are doing work on it, and if you would like to learn ask them if you can watch and get them to explain what they are doing so that you will know more next time something happens.
 

Last edited by jveach; Feb 9, 2012 at 12:36 PM.
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Old Feb 9, 2012 | 06:31 PM
  #19  
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however, i didn't know **** about cars when i started wrenching. just asked annoying questions to friends and watched them do **** and that turned over to bikes. so he's gotta start somewhere
 
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Old Feb 10, 2012 | 04:05 PM
  #20  
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Originally Posted by JankCibberf2
however, i didn't know **** about cars when i started wrenching. just asked annoying questions to friends and watched them do **** and that turned over to bikes. so he's gotta start somewhere

Yes and that starting point is called your friendly local motorcycle shop. Start there, have them do some work, hang out and pay attention if you can, and buy them some pizza in exchange for the loads of noob questions.

When you're done, you'll see that it wasn't all that bad, you just didn't know **** yet.
 
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