The starting problems start!

you unscrewed a spark plug? what do you mean, you unscrewed it a little or you took it out completely? unscrewing it a little wont change a thing, removing it will providing its that cylinder that has fuel in it! And i really dont think it needs alot of fuel in the cylinder to hydrolock it.
 
clean the injectors with carb cleaner and no difference. NEXT .... and to be honest, they all looked the same. Clean and identical.

I tired the starter fluid too, and it did not start up.... this getting OLD!!!!
 
It will gradually get longer. Mine started about one hour and after 1,000 miles got worse. But also not that I rode 300 miles this weekend. Half a can of seafoam and now it doesn't bind up at all after at least ten hot starts. But it does spin and spin and then rumble to life with a little poof of blck smoke. More proof I'm pig rich.
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what is seafoam viperam? an injector cleaner you pour into the gas tank? so are you saying that since you poured that in it now, when hot the starter will spin? :thumbsup::thumbsup::thumbsup::thumbsup: even tho i haven got my motor back together, im swapping injectors tonight!!!
 
clean the injectors with carb cleaner and no difference. NEXT .... and to be honest, they all looked the same. Clean and identical.

I tired the starter fluid too, and it did not start up.... this getting OLD!!!!

you wont be able to clean the injectors with carb cleaner, the cheap way is the way viperam did, the real way is to bring them to a shop that offers that service!
 
Tried the seafoam. Full bottle, full tank, 100miles, no change. :(
Alot of people are telling me its a vapor lock or coompression issue. Whats that all about?
 
100 miles might not be enough! and depending on how bad your injectors (if the problem is that) seafom might not be enough, you will need to have them professionaly cleaned....

my parts are at the customs, i should be back together by next weekend
 
the vapor lock theory was trashed because opening the gas tank had no effect. The symptom you would receive from that is an engine that turns over but has difficulty firing.

Compression issue is exactly right and the argument I'm making. But you have to consider what would cause a compression issue. Low compression doesn't cause this. High does. What mechanically can cause an increase in compression. Valve and piston ring wearing decreases it. Carbon build up increases. But not to this extent. Besides I did a cold compression test already. Cam timing can only VERY marginally increase is the 2-3 degrees would so minutely effect compression you wouldn't tell it by how the engine turns over. Besides my cam timing is checked.

The only thing compression wise that would cause these symptoms is a normal compression cold and a dramatically increased compression while hot. This could only be caused by hydrolocking with either fuel or coolant. In not loosing coolant. And ice its fuel how is it consistantly giving nearly identical compression increases across many bikes?

I think it is the amount of fuel after the pump, left in the fuel lines and rail. A stuck open injector drips this exact amount down the intake into the open Intake valve.

The engine turns over valve closes and as piston rises the fuel nearly fills the entire chamber with just enough compressable air to allow the piston to struggle to reach tdc and barely complete a rotation. Until the next compression stroke.

Allowing the bike to sit evaporates it or allows it to drip through the piston rings contaminating the fuel. When its gone, bike starts fine. The also explains why when unsuccessfuly push starting the bike, can be immediatly followed by the starter spinning freely. The fast moving piston simply pumps that fuel out the exhaust valve.
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Strange observation this weekend. If I try to start the bike before or while the fuel pump is priming, the bike does the exact same thing. Someone please try theirs and tell me if it starts up or does it not want to turn over like my hot crank issue.

Bike was cold and I let it fully prime and started as usual but if i "interrupt" it or try to start to soon, then nothing. ....hope im on to something :)
 
Using seafoam over four tanks using half a can per tank eliminated the binding nearly in its entirety. When before 100% of the time it would bind after only ten minutes warming up.

My engine turns over quickly yet I'm now plagued with an over rich condition that makes my engine hesitate to fire up when hot. Spins over fast but may take 2-5 sets of 10 seconds turning over. Ill hear it hit and randomly it rumbles to life with a small poof of black smoke.

with my loud exhaust I can hear and feel a slight miss under load at low rpm. And judging by my blackend but dry brand new set of plugs with 300 miles on it I am sure I'm rich causing the miss. Sea foam should have kept those plugs immaculate but two ranks after not using it they are like this.

If the plugs are hanging open when they are hot it would explain the starting issue and the driveability issue. 5100 miles on my 03 the bike sat for quite a while. maybe ts possible they got trash stuck in the viton tipped plunger. But I think its more likely a problem with the internal springs of the injector or the plungers bushings or coil. I think it is catching when it gets hot.

I could send them off to be cleaned or tested but I'm thinking qbough buying new stock ones or upgrading to the s2000 injectors. Need to do more research on that though.
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Remember, my starting problem started after i ran out of fuel in a curve and kept my foot on the gas until the pump reprimed itself, so i must have damaged an (or more than one)injector in the process. My buddys 05 busa binds for like a split second when hot, maybe hes on the verge of having the problem.

just sent my spare set to get cleaned today before instaling them. If i still have the problem will upgrade to s2000 injectors, my buddy who has a turbo on his busa did the upgrade, ill ask him about it.
 
Remember, my starting problem started after i ran out of fuel in a curve and kept my foot on the gas until the pump reprimed itself, so i must have damaged an (or more than one)injector in the process. My buddys 05 busa binds for like a split second when hot, maybe hes on the verge of having the problem.

just sent my spare set to get cleaned today before instaling them. If i still have the problem will upgrade to s2000 injectors, my buddy who has a turbo on his busa did the upgrade, ill ask him about it.

Mine started very mild and progressed quickly.
When you find out about those s2000 injectors, let me know what the part number is, and what years of s2000 i can use.
 
Yeah..... i was misguided when it came to the injectors. I thought the s2000 injectors would have a better spray pattern, maybe better atomizaion. But i learned they are 36lb when stock hayabusa is 24lb. Stock bore, with no power adder it would be rediculous to upgrade to the s2000, Even if you could lean the a/f to run it, the pulse width would be so short, it would suffer BAD at low rpm probably undrivable.

I need to look into swapping out a set of known good injectors. My builder mentioned doing it for me, but he is an hour and a half away and id have to drop it off for a week or 2. Other options would be getting these cleaned, but im disinclined, thinking that the injector has a mechanical malfunction.
Cheapest new stock injectors ive found is $360.

So the search is on.
 
i have also noticed, it seems from my reading, most if not all the bikes that have the problem are 2003's.... maybe during that year they have a batch weak injectors...

also from my experience, you can easely get the s2000injectors to idle good on the busa... i have 550'cc on my apex snowmobile that i turboed and they are 380's stock, it idles like stock...

i had 1600cc on my old turbo racecar yes no typo 1600cc on a 2.0 liter 4cyl motor and it idled pretty damm good too
 
Since posting I have 17 people that have called me with the same problem many more have emailed me, pm'd me or posted on my threads from six forums.

I made a list of everyone from different forums that had the problem. It took seven months but I have at least contacted 100 of the 116 people. I'm sure many more have the issue but haven't posted or visit forums.

Your exactly right. Most are 03's. 90% at least. The others may simply be another issue all together. Its a damn shame myself and four of the six shops and dealers that troubleshoot this bike spent hours on the phone with different Techs at suzuki and they don't have a clue.
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I agree big injectors on a turbo'd, supercharged, nitrous, or big bore will work. But I don't know of anyone that runs those big injectors on our stock bike. Even if I paid the $350 for the injectors I'd still have to dump more money to tune it. its a steep price to pay when I'm still trying to isolate the issue and adding more variables wouldn't help.

I'm looking into getting these tested or swapped for new stock ones. I wish venom or accell had some replacements.
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