Great to be here with all you knowlegable v-owners...
I now this is a very hot topic on these and every one is different. Just bought this Vision 82 only 2300 miles on her. Here is what it does I can get a idol and sync carbs, But after that the idol really hunts 1300-4000 with no throttel responce just dies. I have to twist the wrist slow.
This is what I have done.
1 Cleaned carbs multipe time(soak and guitar strings)
2 Checked every electrical connection front to back
3 cleaned all the wires on the coils
4 New feul lines and in line filter
This bike is completly stock.
I have been pulling my hair out for 10 days now. I have 3 other bikes and this V has a vendetta cape on it for somthing i did in a past life.
Thanks
Eric
A few things to check... is the accelerator pump working? Are you sure you got every little passage? How do your jets look? Try looking for air leaks... spray the carb boots and other areas around the carbs with starter fluid, listen to see if the rpm's jump. Have you done a bench sync on the carbs yet? They could be horribly out of balance as well... I'm sure some others will chime in with ideas as well, but it's a few to start!
temporarily block off or cap the YICS ports (DON'T connect them together) see if that helps.
where are you located?
I beleive the accel pump to be working it pumps fuel to both carbs well but as I am new to the vision. Is there a better way to check then sight
thanks arthurdent510.
I have tried with the YICS connect and pluged with now difference.
I was thinking it just might be valves but unsure based on millage( I am going to check that tonight)
I live in Mankato Area Minnesota.
how did you synq the carbs? i'm putting my money on that...
I have a homemade manometer ( you know the one yard stick 12' of line and some 2 cycle oil)
something has to be way off.. pilot adjustment maybe (you cleaned them out right?) if it synqed up well, (doesn't sound like it should have though) then i'd start looking for a vacuume leak or worn throttle shaft seals...
that what I think but I ca not for the life of me find it right now I have gone to the local salvage yard and swapped every jet and clean the carbs 7 times in the last 10 days I believe The they are church clean at this point. The spray test give me a little extra rpm's after about a minute.
it's rare that these jets need to be replaced unless they are really buggered up..
check your float hight.
spray cleaning these carbs just doesn't do it, you gotta DIP EM.
critical areas to clean: (make sure you got them all)
--2 ea #130 pilot air jets (top of carb)
--main jets: #122.5 front #127.5 rear (behind 10mm bolt on left side of carb)
--2 ea #60 pilot fuel jets (bottom of each carb, behind the slotted screw on the bottom of the carb.
--Pilot adjustment screws: located just above the intake mount area on the left side of the carb. may be behind brass plugs if the plugs have never been removed.
--emultion tubes located in the carb body under the airhorn. can be a bitch to get out.
-- "low speed curcit fuel oriface" located deep down in the larger of the 2 holes in the 'figure 8' part of the carb body. one of the brass tubes from the carb top fits into this hole.
After idolling for a couple-10 mins it the rpm start to climb to about 4k then with in 2 mins they will slowly come down. when the rpm's are over 2500 it seems to have better throttle response.
Lucky,
I have dipped (chem Carb and Parts cleaner) them every time and pulled out every jet and they match what you stated. can someone give me some insight as to the best way to start to set the floats as I have followed the book manual and looked through the forum as well.
The steps I did for the floats are..
top of carb upside down at 20 mm
then float hang it's about 36mm I think as I am not in front of the bike right now.
Quote from: shoetbus on June 07, 2011, 03:09:44 PMThe steps I did for the floats are..
top of carb upside down at 20 mm
then float hang it's about 36mm I think as I am not in front of the bike right now.
Ahh! There it is! you got it backwards! :D
with the carb top upside down measure 36mm to top (really the bottom in a normal position) of the float at the far tip.
fuel level measured with a clear tube shoulf be 20mm below the gasket surface.
can / could you post a picture of this.
And would float height really give that many problems? I mean I can see this being a problem if it does not get enough fuel. Or running out the over flow tubes if there is to much fuel but poor throttle response ?
I guess I have alot to learn about this bike. Thanks to all I will update later tonight.
like this:
(http://p45ckq.blu.livefilestore.com/y1pqAq9M0xnT-_fYyCrJKVGfWTeDq7sazI6APZpkjJY6U2gswtRXrFmQVP89XlcyyI6TPpe7QrFFNWkvRJjD1N8sDM6XDw2lAMe/drop.jpg?psid=1)
thats perfect thanks
Could possibly be a vacuum leak?
Just a thought. My money was on the YICS given that I just had the same problem and it was a leaking YICS.
David
Dave, my friend, my buddy, just curious, did you read thru all the posts? or just the first one?
:) ???
Stupid question, is it running on both cylinders?
yes I have spark at both cylinders (via a hand held tach)
The YICS has passed ever test that I have read on the forum (but at this point makes no difference if it is in or out.
Float s are set right at 36 now but on pri I have a fuel leak out of the over flows sometimes
Valves are with in spec too.
I ran out of time to check the port on the carb (pic 8)
I did notice last night heard some ticking (front spark plug has some wild/loose spark arching to the out side of the spark plug boot) I will swap that out tonight.
I hope I am getting closer to running better
Again thanks for all you help..
Eric
QuoteI ran out of time to check the port on the carb (pic
what port?
so you reset your floats. if fuel is comming out the overflows, double check your hight (the 36mm one) you might need to drop it a tad 2 mm or so.. not uncommon.
have you restarted it yet? any difference?
The port that the one brass pick up tube sits in the carb not the tube in the bowl
you got it. btw, for clarity, it's the one in my pic here, positioned between the float arms.
Found some more time that work gets in the way...
Upon some more testing took carbs off again pushed throttle and low and behold no fuel out off the front carb. Took completly apart and back in to the tank with all the jets and that strange right angle fuel pipe. Is there anything else I can check once I have it back together and test the fuel supply on the bench. what else do you suggest to try to reach some of these small deep port (right now I use a varity of stainless steel guitar strings)
Eric
The ultimate weapon is an ultrasonic cleaner. If you don't have one, find a bike shop that does, and buy some time in it. That's what I did.
From time to time Harbor Fright has ultrasonic cleaners for pretty reasonable prices.
the best deal on an ultrasonic i've seen:
2.5 litre for 80 bucks
http://www.harborfreight.com/25-liter-ultrasonic-cleaner-95563.html
shoe:
that fuel pipe is an acellerator pump nozzle. it fires when you twist the handle. the front one gets it's fuel from the rear carb. via that vacuume hose sized line theat connects the 2 carbs on the right side of the carbs.
if the front one is clogged, VERY CAREFULLY grab the big round part with GOOD vice grips, turn & wiggle it gently up & out. do not bend the l shaped pipe.
be careful, under the nozzle is a tiny check ball & brass weight. they are probably stuck shut.
remove them & clean this area well. you can clean out the nozzle using the wire from a sewing needle threader (if you don't know what this is, ask)
put it all back together, clean up the nozzle if the vice grips messed it up using a small flat file.
alighn the spray according to the manual & off you go,
--Lucky
I have had this apart and cleaned/soaked the weight and check ball. It is soaking today will put it back together when I get home tonight and see what happens.
I tried to find this what did you call it so machine this is a very neat device ;D
Eric
I noticed while on the S.C.I. site they have sonic cleaning and carb rebuilding service. Do you know anything about this service or if anyone has used it.
i haven't tried their service, i do all my own repairs. I'd love to get that Harbor Freight unit, i think that size is really good for the price.
*cough* Fathers Day *cough*
*Cough* *Cough* Spectre!
Its now go fuel out of both GREAT NEWS.. Put some more fuel in got it started now it time to sync. I am wondering about the wire to cut or disconnect from the control box is there a better end to separate/cut. Again to all thanks for all your help.
Eric
You mean to disable the rev limiter? Personally I would (and did :p ) just unscrew it from the back of the tach. No point in doing a more invasive modification when a simple screw and electrical tape will accomplish the same thing.
Tried for a couple hours last night it is better but it still has that dead spot in the throttle but it is better. I do think I need to get some new plug wires still has some jumping spark. maybe I just need to go for a ride for a hour or so try to loosin it all back up for never being rode.
Plug wires are often overloked and should be replaced. Even though they may look OK, 25+ years of sitting around takes its toll on them. Replacing them realy made a difference in how my bike starts and runs.
Tiger makes an awesome set of custom wires for the Vision. Head on over to the swap shop section of the forum and check out his listing.
David
Well I am going to get new plug wires and see what happens I will have to wait till the get in. As for the rest I do not think I have every heard wires causing a carb to choke, But I have been wrong many times before. If the bike is cold It will start great but once it get warmed up it really hunts the idle still 1200-3500k The only way I have been able to get it down is to push the throttle down on the carb. Might be a spring for the butterfly? But that still does not help the problem when you crack the throttle wide open it dies.
Eric
You are all a fantastic carb guru's.. Finally got it done had to wait for the gas tank to get back to me. After rebuilding the carbs what feel like a couple dozen times all is good now. Here are the steps taken for my problems.
Get a sonic cleaner and start there (work like a charm) after cleaning the and setup/sync for sure 15 times I had enought and bought a sonic cleaner and this was able to get all those spots a e string ( stainless steel guitar) would not get.
Found new carb gaskets set and replaced the throttle cable binding in the sheeting.
Just got off the bike and it runs great.
Let my son take it for his first ride on the vision as I am making him start on the maxim 400 ear to ear grin after the ride on the vision so thanks again for all your help. I hope I can return the favor someday.