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Old 12-27-2005, 07:05 PM   #1
busa713
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bike doesn't want to crank

I have a 95 gsxr 750 and have not had a problem with it until now. I had since september of this year and it just started up. Every time I try to turn in on it never cranks. I sounds like it wants to crank but when I release the start button, it backfires on me and I smell gasoline. Nothing is leaking though. I know it can be a number of things wrong with the bike but i just need a few suggestions from other bike owners who have had similar issues with their bikes.
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Old 12-27-2005, 07:14 PM   #2
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Sounds like ignition to me man...Im not the smartest guy when it comes to bikes but i would take a long hard look at that. If everything checks out do a compression test if it comes back bad its probbaly some valves or blown head gasket. Check your oil make sure there is no water in it...
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Old 12-27-2005, 07:18 PM   #3
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if you smell gasoline and it nbackfire it could mean that the carbs are getting flooded and then it burn it off with a backfire. try this:

1. Turn your fuel petcock ot the "off" position.
2. Try to crank it over once.
3. Wait about 2-3 minutes
4. Try cranking it again and give it gas with the petcock still "off".

since youve been cranking it off and on it may drain the battery some so if you have a battery tender hook that up.
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Old 12-27-2005, 09:06 PM   #4
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O yea lol i forgot it was carburated yea deff. check out that carb man....
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Old 12-27-2005, 09:14 PM   #5
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If the bike has a choke which I assume it has, look and see if its operable.
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Old 12-27-2005, 10:37 PM   #6
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Good possibility the vacuum petcock is bad and is allowing gas to be pulled through the vacuum line. Pull the vacuum line and see if it's wet or if fuel is leaking from the petcock. Pull the oplugs and seee what they look like; are the wet and black?

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Old 12-28-2005, 07:23 AM   #7
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Nope. None of the above.
It's once again the flux capacitor.......noobs, they'll never learn
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Old 12-28-2005, 09:18 AM   #8
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sounds like it could be the muffler bearing. it may be spinning loose
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Old 12-28-2005, 11:55 AM   #9
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Originally Posted by Godsuki
Nope. None of the above.
It's once again the flux capacitor.......noobs, they'll never learn
that 's so expensive, last time it happened to me i just sold the bike.

what did you do with yours Godsuki?
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Old 12-28-2005, 01:45 PM   #10
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I just called Doc Brown and he hooked me up.
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Old 12-28-2005, 01:49 PM   #11
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oh Doc C. Brown?

good guy, i've known Charlie for a short while. I didn't realize he was into bikes! I wonder what model F.C. unit he uses on his bike. Do you know what he rides?
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im not a midget , i was actually born with a type of dwarfism, but i took medication for 12 yrs to reach just 5'6"
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Old 12-28-2005, 02:50 PM   #12
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No, just Doc Brown. Charlie rides the Red Baron dog house
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Old 12-28-2005, 04:32 PM   #13
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bike cranks now but doesn't stay on

today I made some progress on my bike. I finally got it started somehow. This time I put the choke all the way up and it started and I thought i let it warm up for bout 5 minutes. So when it did warm it I put the choke down and then the bike cut off as soon as I did that. After a few more attempts the bike did the same thing. For some reason The bike will only stay on if the choke is all the way up. i don't know anything about bikes and once again I seek information from those who have had the same problem.
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Old 12-28-2005, 04:36 PM   #14
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let patrick at Motorcycles Unlimited check your carbs. they may just need to be adjusted and cleaned.
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Old 12-28-2005, 04:52 PM   #15
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do me a favor... check down in your crank-case, and make sure there is no gasoline in there mixed w/ the oil... if there is.... i know what the problem is..... it happend to my old gixxer750

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Old 12-29-2005, 10:48 AM   #16
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Quote:
This time I put the choke all the way up and it started and I thought i let it warm up for bout 5 minutes. So when it did warm it I put the choke down and then the bike cut off as soon as I did that.
Holy , I mentioned the choke in my previous post and it may turn out to be the choke (or not)? What a guess I made.



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Old 12-29-2005, 10:53 AM   #17
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Has the bike set up for any length of time? Do you have any vacuum leaks? Are the carbs fully in the boots? (I've seen those bikes backfire through the carbs and knock the carbs out of the boots)

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Old 12-29-2005, 05:54 PM   #18
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not sure

Quote:
Originally Posted by Patrick
Has the bike set up for any length of time? Do you have any vacuum leaks? Are the carbs fully in the boots? (I've seen those bikes backfire through the carbs and knock the carbs out of the boots)

Patrick
like i said before, i am not familiar with bikes at all. This is my first one and I am not sure how or where to check for these kind of problems. Im just gonna take it to a mechanic some time soon. How much do you all charge at your shop just for a check up?
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Old 12-29-2005, 11:12 PM   #19
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on my '93 gixxer750 i had a float valve stuck open, and i forgot to turn off the gas one time... alot of gas siphoned down through the carb, and into the cylinder, where it then seeped through the piston ring, and into the crank-case, when i tried to crank it it wouldnt turn over at all... so i figured the bat. was dead... so i tried to jump-start it, and hydro locked the piston, and broke the piston rod.
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