Hiccup while maintaining speed

[Namerif]

I have a 790 suzuki gs 850 and i was riding over a pass in washingtion when my bike hiccuped and lost almost all power and had a dead hole i brought it back replaced puch pull throttle cables, new float bowls cleaned the tank new air filter fixed timing and rebuilt petcock if anyone has any ideas what this could be please let me know or a mechanic that knows these things like the backside of their hand in south eastern washington PLEASE HELP!!! ill post more later today but i have class so i have to go

[tom203]

I have a 790 suzuki gs 850 and i was riding over a pass in washingtion when my bike hiccuped and lost almost all power and had a dead hole i brought it back replaced puch pull throttle cables, new float bowls cleaned the tank new air filter fixed timing and rebuilt petcock if anyone has any ideas what this could be please let me know or a mechanic that knows these things like the backside of their hand in south eastern washington PLEASE HELP!!! ill post more later today but i have class so i have to go

Basscliff has plenty of ideas-maybe you have noticed his low profile site ? Just how high was this pass, and are you used to traveling at sea level?

[BassCliff]

Hi,

There's not really enough information provided for any specific recommendations. Are the carbs really clean? Have you checked for consistant spark? It could be anything from electrical to a burned valve or dirty fuel. Is all the maintenance current?


Thank you for your indulgence,

BassCliff

[Dogma]

Why was the petcock rebuilt, and did you test it for proper function after the rebuild? Lots of folks around here are skeptical of petcock rebuild success. I myself needed a new petcock after experiencing symptoms that sound similar to yours.

Others have had problems with a gas cap that doesn't vent properly causing these symptoms.

[tkent02]

PLEASE HELP!!! ill post more later today but i have class so i have to go

Hopefully the class is English.

[Big T]

I have a 790 suzuki gs 850 and i was riding over a pass in washingtion when my bike hiccuped and lost almost all power and had a dead hole

fixed timing

None of the passes in Wa are high enough to cause this problem, so that's just coincidental.

Sudden power loss on a bike with points = new points and condensors, or better yet, a Dyna S

I'm starting to sound like a loop tape here - points and condensors, points and condensors

None of the other information you sorta provided nakes any sense.

[BassCliff]

Hopefully the class is English.

Tom!

You really crack me up sometimes, buddy.


Thank you for your indulgence,

BassCliff

[Namerif]

Hopefully the class is English.

No it was not english. I was in a hurry to get to school, obviously. Ok so anyhow, I have a Dyna S ingnition not points, we adjusted the timing to what my mechanic said is correct ( he is also the mechanic for the fire department) and then we noticed that with an extreme change on the electronic ignition and placement, there was no change in the motor! So we removed the spacer plate and it started to react to the rotation of the electronic ignition. However since we pulled that plate out we can not time it correctly except by sound. Any tips on that would be very much appreciated. We also rebuilt the petcock due to the copius amounts of rust inside my tank, i threw some bearings in there and went to town and removed most if not all of the rust then bought a tank liner for it and it seems to be working so far! The petcock and the integrated fuel pump were clogged solid and needed to be rebuilt, it does work correctly already checked. It also smokes when it does its moody little "hiccup" it feels as though someone is applying the brakes and I get held back I have total loss of power and my bike will not accelerate only deccelerate, so I throw it down a gear hammer on the gas she smokes like a chimney (white smoke) and then i end up having to pull the clutch in wrap her out bounce it off the limiter and she will run fine for about 10 minutes then it "hiccups" again. I have replaced throttle cables push and pull and cleaned the tank, I am drawing a total blank I'm half tempted to just sell the dang thing and get something else, however this is my first bike, I am not mechanically inclined, this bike has been threw hell and back with me and I really don't want to give up on it. Like I said if anyone has any ideas on what it could be help would be greatly appreciated. I am working on $400 dollars a month as I am currently going to school to get my paramedic cert so if this is going to be to much of a financial burden, I guess I will sell it

[tom203]

Help us out here,please. So how long have you had bike? As I read this, it seems going over pass had nothing to do with your problem- it just intensified it, since the engine was working harder . Petcock problems have a way of spreading to carbs rather quickly and interfering with them. Unless, your fire engine mechanic is good with bikes, I'd review correct timing setting to make sure that you have about 35/40 degrees of advance at 4000 rpm.

[Big T]

1. I have a Dyna S ingnition not points, we adjusted the timing to what my mechanic said is correct ( he is also the mechanic for the fire department) and then we noticed that with an extreme change on the electronic ignition and placement, there was no change in the motor! So we removed the spacer plate and it started to react to the rotation of the electronic ignition. However since we pulled that plate out we can not time it correctly except by sound. Any tips on that would be very much appreciated.

2. We also rebuilt the petcock due to the copius amounts of rust inside my tank, i threw some bearings in there and went to town and removed most if not all of the rust then bought a tank liner for it and it seems to be working so far! The petcock and the integrated fuel pump were clogged solid and needed to be rebuilt, it does work correctly already checked.

3.It also smokes when it does its moody little "hiccup" it feels as though someone is applying the brakes and I get held back I have total loss of power and my bike will not accelerate only deccelerate, so I throw it down a gear hammer on the gas she smokes like a chimney (white smoke) and then i end up having to pull the clutch in wrap her out bounce it off the limiter and she will run fine for about 10 minutes then it "hiccups" again.

4. I have replaced throttle cables push and pull and cleaned the tank,

5.I am drawing a total blank I'm half tempted to just sell the dang thing and get something else, however this is my first bike, I am not mechanically inclined, this bike has been threw hell and back with me and I really don't want to give up on it.

6.Like I said if anyone has any ideas on what it could be help would be greatly appreciated. I am working on $400 dollars a month as I am currently going to school to get my paramedic cert so if this is going to be to much of a financial burden, I guess I will sell it

1. Put the plate back on and use a timing light to properly set the timing. Why your friend did the things he did leads me to question his methods and ability

2. There is no fuel pump on a GS. When you say you rebuilt it, what exactly did you do? Did you take apart the vacuum unit?

3.Hard to rell if this is a carb issue or a electrical issue. Did you ever drain the carbs,or better yet, strip them to get all the rust and gunk out of them? The lack of power would seem to be that you are losing two cylinders for some reason. There is no water in a GS, so white smoke may mean gas in your oil. Open the oil filler and smell the oil. Does it smell like gas?

4. a) cables - were they not operating correctly? b) tank - have you checked to make sure no refuse is coming out anymore?

5. If you're not mechanically inclined, owning an old bike is probably not for you unless you're willing to learn. Most of what you'll need to know is on BassCliffs site. See the Top 10 Things and go from there. You have to be willing to correct age related issues (like a rusty tank), do all the maintenace that was neglected and then figure out what else is wrong

6. We'll have lots of ideas, however, we can't diagnose it without you establishing a baseline of maintenance so certain things can be eliminated.

It sounds like this bike was abused before you got it and you'd have to be willing to work on it for a while. If you're counting on it to be a daily driver, you may have to spend $500-1,000 on it.

Sschering's in Kennwick, you could PM him and see if he could offer any help.

[Namerif]

this bike was not maintained very well before I owned it. It is not to hard to tell the some things have been jerry rigged on this motorcycle, there is more than what I am finding, I just need to get rid of it and get a new one, thank you all.