Super Jet I F'n Give Up! Need Help In East Orlando... [ NOT FIXED YET! ]

[retroicon]

Alright, I give up...

I'm so sick of taking this motor apart, and putting it back together without getting on the water and I need some help in the East Orlando area to get this damn thing to just f'n run properly...

Before anyone has any wrenching suggestions, I appreciate it, but at this point it's clear that I need another set of eyes looking at this with me, or for me... and I'm done doing it alone, and just want this thing running.

It's a 701, stock dual 38's, bored out to 83mm, LPW freeride ported...

At this point it just has to be something simple, and something i'm going to want to rage over when I find it... but, I'm done.

So if there's anyone in the Orlando area willing to help me out, let me know. I'm more than willing to pay for your time. I know CarterB, Lucas, and JetManiac are in the area... any of you guys have a suggestion? Or, anyone else have a suggestion?

-Gary

At this point I've gone through, or replaced...

- New Primer
- New Petcock
- New Stator
- New CDI
- New Coil
- All New Seals & Gaskets
- Pressure Tests Properly (no airleak)
- Rebuilt Carbs with New Mikuni Parts
- Yes, I have spark.
- Yes, all it's properly grounded with a new OEM cable.
- New Battery

The machine has new 83mm pistons, new rings clips, and pins. Fresh bore and porting, all new fuel and water lines all around. I have spark, I have compression, I just don't know what to check anymore... and, to be honest, I'm f'n tired of looking

 

[GIL]

I know this is NOT the help you are looking for, but I am VERY familiar with that setup. I have one on my work bench right now. What is it doing / not doing?
I would love to help via the X and or cell if I can. (I am 9 hours dead north of you or I would drive to your place tomorrow).

 

[lvnspeed]

I cant tell you how many times Gil has helped me.

 

[GIL]

I cant tell you how many times Gil has helped me.

I like to refer to it as the niggas helpn niggas network! LOL It has worked real well for me for several years now!

 

[Billybo455]

i can tell you gil's gotten me yelled at by mods! other then that. sit back. take a break. it's usually something simple that you easily over look. there's a few of us that are local. you'll get it sorted

 

[retroicon]

I really don't want to play with it anymore...

At this point, it just won't start. The lines are primed, and it'll fire for about a second if I dump fuel in with the primer, but that's it... won't keep running.

The last time I dumped fuel into it with the primer, I think there was probably some residual fuel in the cylinders and it just ran up to about 6,000 to 7,000rpm and then died all by itself after about 4 seconds.

The timing is advanced about 3 degrees, it has an MSD enhancer, new JSS coil, and the stock dual 38's with new everything.

I'm just done. At this point I just feel like the next time I push start I'm going to have it blow up in my face.

I'd rather just pay someone to fix the damn thing for me... I've been wrenching on my own machines for almost 20 years, and I've never had a problem getting a machine running, ever. I competed in closed course for 8 years, never had a problem, did freestyle for 3 years, never had a problem. Have done 7 freerides in Daytona, and never had a problem until I hit bottom, and lost all 4 mounts... even then, the motor still ran fine. In all that time I've been the only wrench on my machines, but for some reason, I can't get this damn thing to run.

I'm just done wrenching on this thing. I must be missing something stupid, and I've checked EVERYTHING at least 10 times now. And no, that's not an exaggeration... it may actually be more. If I haven't found the problem yet, I'm not going to find it...

I've checked, re-checked, double-checked, triple-checked, and then checked everything again...

I'd have bet anything it would have fired, and run like a monster this time... I'm glad I didn't make the bet.

 

[GIL]

1st easy scenario

So the carbs are not pulling fuel from tank. Remove the pulse line from the pump or the cases and spin engine over to see if you feel a pulse of air as engine turns over. (with plugs in and plug wires off). LPW 730 kicked my azz this winter all to find a piece of crap in the pulse fitting in the cases causing no pulse to fuel pump.

Also-loose fitting fuel lines or pinhole in a fuel line.

2nd possible scenario

And again learned the hard way from being in a hurry assembling top end-which way are the arrows on piston tops pointing? I know you already know the arrows go to exhaust ports-but again, a easy mistake to make late at night.

I feel your pain and know what it's like to be where you are right now. I prefer to learn chit the hard way. LMAO

 

[Billybo455]

well if that's how you feel about it i'm not sure i want it to blow up in my face... it'll fire for a second or two after it's primed? if you use the primer is the amount of time it starts for consistant? do you have the idle turned up? checked the reeds? have you checked for spark when the motor attempts to run after being primed?

 

[Billybo455]

have you tried disconnecting the stop part of the stop/start switch?

 

[GIL]

have you tried disconnecting the stop part of the stop/start switch?

Dam good point! Yamaha SS switches are JUNK!!! I keep 2 new ones in the truck at all times cuz I only get about 2 seasons on the junky bastards and the only time they take a chit is at Nationals on Saturday AM right before I compete.

 

[retroicon]

well if that's how you feel about it i'm not sure i want it to blow up in my face... it'll fire for a second or two after it's primed? if you use the primer is the amount of time it starts for consistant? do you have the idle turned up? checked the reeds? have you checked for spark when the motor attempts to run after being primed?

No, it seems to depend on the amount of fuel dumped in via the primer...

Idle is open slightly, reeds are the stockers, and are fine. They all seat properly. I checked this 3 times already. Once pulling the motor apart, a 2nd time pulling just the intake manifold, then again when I had the motor completely apart a 2nd time.

 

[Scorn800]

Have you got the lanyard in?

 

[retroicon]

It's not the start stop switch...

I've tried without the black/white wires attached, and have also tried via taking the entire switch out of the equation, and just jumping the wires with a pair of needlenose pliers.

 

[retroicon]

1st easy scenario

So the carbs are not pulling fuel from tank. Remove the pulse line from the pump or the cases and spin engine over to see if you feel a pulse of air as engine turns over. (with plugs in and plug wires off). LPW 730 kicked my azz this winter all to find a piece of crap in the pulse fitting in the cases causing no pulse to fuel pump.

Also-loose fitting fuel lines or pinhole in a fuel line.

I have pulse, checked that...

And, this my 2nd set of brand new fuel lines. I removed the first set entirely, just in case there was a hole I couldn't see, and replaced every last piece of it with new motion-pro line 2 days ago.

I ordered the fuel lines one size smaller, 3/16, and it's tight as hell all around... I can barely pull them off, even if they're not zip-tied down.

2nd possible scenario

And again learned the hard way from being in a hurry assembling top end-which way are the arrows on piston tops pointing? I know you already know the arrows go to exhaust ports-but again, a easy mistake to make late at night.

I feel your pain and know what it's like to be where you are right now. I prefer to learn chit the hard way. LMAO

I just shined a light down the cylinders, and they're pointing the right direction. That said, how would that cause it not to start?

-G

 

[retroicon]

Have you got the lanyard in?

Yes... the start/stop switch on a yamaha won't let the starter turn if the lanyard isn't attached.

-G

 

[gto0209]

is your one way valve good on your tank? have you tryed pressurizing your tank to get some fuel in the lines?

 

[swanny]

Its your carbs. Its the needle getting stuck. You should just get a clean set of 38's and use your set for back up parts.

 

[retroicon]

Its your carbs. Its the needle getting stuck. You should just get a clean set of 38's and use your set for back up parts.

I just put in a brand new needle and seat, and new springs as well.

EDIT: Should also mention that all other parts were replaced a well. All diaphragms, gaskets, etc.

-G

 

[retroicon]

is your one way valve good on your tank? have you tryed pressurizing your tank to get some fuel in the lines?

Yes, I did this... and when opening the tank after a bunch of attempting to start the motor, there's a vacuum like there should be...

 

[augustaf]

I hope you mean pressure, not vacuum.
One of your carbs has a fuel pump, have you taken that apart and visually checked the flapper valves? judging by your description of symptoms the carbs are not getting gas.