I cant get past 6000rpm???

My seca turbo starts and runs great but when i hit the throttle it rev to 6000rpm and chokes and i'm not getting any boost pressure any guesses?

 

Are you sure the turbo is spinning?

 

Look and see that the wastgate is not stuck open.That will let the boost out and not make it to the motor.

 

ya and when i rev it up it spins faster ???
is the wast gate supposed to flow exhaust during idle?

 

if i block off the right muffler completely will that make the possibility of a stuck wast gate obsolete?

 

Do not plug the muffler. When the turbo makes to much preasure the wastgate opens to let out the overlaod of presure. I think it opens over 12 LBS. The wastgate should shut when boost drops below 12 LBS. You should have a vacume line running to the turbo up the rightside of the bike that runs to the carbs. Inspect the housing on the turbo were the line goes in but do not plug the muffler or the presure can blow off the head.

 

ok thanks i wont.
so there should be now air leaking past the wast gate then?

 

i just went and checked to see if the wast gate actuator moved back and forth and it seems to move freely but i'm still unsure about the leaking exhaust.

 

Air shouldn't be leaking from the right side muffler .

 

Have you looked around to see if the PO installed a Rev-Limiter. If she's burping steady right at 6K ... then, maybe there's a limiter.

If there is a limiter ... and, it's a DYNA -- The DYNA Limiter's will be intermittent unless there's a resister on each main wire to the coils.

 

no just a stalk bike no aftermarket rev limiter

 

it seems that there might be carbon or something keeping the wast gate open slightly do i have to take it apart to fix the problem is is there a easy trick to it??

 

i just wont to ride the weather is finally nice
but i don't want to wreck my bike by running it with this rev and boost problem

 

New here but had similar problems with my XV920 Midnight. Seems that if the air intake gets partially blocked, it will let the motor idle and run up to a certain point and no farther. Make sure air intake is clear and also make sure that fuel is getting to the carbs (FI?) without being pinched off. On my XV it was 5500 rpm's, almost felt like a rev limiter, and it did not matter which gear or how fast I was going, just 5500 rpm's. cruzerjd

 

A 1983 turbo should have the Power Up kit already installed to give you around 11psi boost before the wastegate opens. Make sure the shaft isn't bent or maladjusted (shouldn't have any adjustment I think). Mine is seized shut, so I disconnected the wastegate entirely. The surge tank has a pop-off valve in it which opens at 15psi, so you still have overboost protection. These bikes sometime have fuel pressure regulator problems which prevent the float bowls from pressurizing, thereby starving the engine of fuel under boost, causing misfiring, rough running and backfiring (mine does it). The FPR can sometimes be coerced into working again, sometimes not. It is an incredibly expensive component (if it is still available), so hopefully, if it is wonky, it can be fixed. Someone said that he found scale buildup on top of the rubber diaphragm that he removed with some CLR and some mineral spirits. I'll be trying something like that when (if) it ever warms up around here.

 

Like Mac said.....make sure your petcock is clean....make sure your tank isnt rusty inside, if it is reline it.....1 speck of rust can hinder the diaphram operation.......make sure your inline filter is clean.......and use some Sea Foam......the stuff is awsome...sometimes it takes 2-3 cans, I usually run 1 can per gallon.....always worked for me and allot of others.

 

Ok i found out what the problem was.
The wast gate was leaking all the pressure created by the turbo out the right exhaust pipe, so i blocked it off after checking that the pop-off valve worked. it turned out that without the pressure of the turbo at hi rpm the motor will only reach 6000rpm but with it the bike runs like new. So happy to be riding again.

Thank you all for your very helpful advice its nice to know that people will help out when i have a problem.
Thanks

 

MacMcMacmac if you ever get the fuel pressure regulator figured out LET ME KNOW!!! I have been living with this problem forever. I know its NOT THE CARBS or any electrical. I have traded out most of those components at least twice maybe three times. If anyone gets or finds a suitable FPR for fairlly cheap I will buy two!!! Then again if it's not the FPR than its the turbo that I have had rebuilt recently by a REPUTABLE company!!!

 

Well, I'm not sure if what I did worked, but I shot some 3 in 1 Silicone lube into the FPR and then pressurized it with a bicycle pump. I had the bike out a couple of nights ago and the stuttering and backfiring was gone. I don't know if I pushed the regulator outside its "comfort zone" and restored full travel, or the lube broke up some deposits above the diaphragm, but it pulled very cleanly, knock on wood. I did send a healthy dose of Seafoam through the fuel system about a week earlier. I wish I could be of more help.

 

The FPR is not available, if it was available it would have been around $250.00, yes I just checked with a local Yami dealer.
Is your fuel pump working? Start there, take the fuel pump off and hook it up to 12v. Your battery charger would work for that. If it spins and puts out fuel, then you can move on to other possiblities. Check your fuel check valve and make sure that its not dirty. Take the time to clean it up and polish what you can get to. Next would be the FPR. I have heard that squirting some silicone spray in there would help. I haven't tried it. Also make sure you have fresh spark plugs. I just changed mine and still cant figure out why, but all of the sudden I can rev the snot out of mine.
Ohh one last thing, take your fuel cap off and take the 4 screws out, then remove the cork gasket. That has given problems too, putting vacuum in the tank.
Sean