Ok, I got a couple more things fixed up.
The airbox now has all it's screws (still can't beleive that they had put the cover back on with only one screw in and with one of the two airbox to casing screws missing...) :
The air filter is now the good one (I think I'll be changing the airbox cover and it's grommit because they are both deformed) :
In order to let the engine breath a little, I had folded the old filter so the inlet wasn't obstructed.
That is also why the airbox cover didn't have all it's screws...impossible to close it completely!
Changed the fuel petcock. I'm assuming that so many years without riding just dried out the rubber diaphragm.
Symptoms :
Idle was not stable (sometimes high, sometimes lower almost stalling)
Running with hiccups sometimes at lower revs. Ok at high rpm's.
Fuel mileage was worse and worse and the above symptoms also (ran it about 200 kms like that).
Starting the engine was becoming almost impossible.
One morning I saw a puddle of gas under the scoot.
It was coming out by the carbs overfill outlet tube.
The engine was flooded, I had to take the plug out and let it dry.
I took the carb apart to check the floater was ok and it was.
Then I checked the vacuum tube...full of gas.
So the engine was burning gas from the carb AND the vacuum hence the bad mileage, poor starting, running and idling.
Now everything is ok (I did have to redo the carbs settings) but I have lost about 3 to 5 km/h top speed (not as much gas coming in...
![* :*:](./images/smilies/icon_*.gif)
) and TT starts first time, idles super sweet and runs as it should (but maybe main jet should be upgraded given the lower top speed?).
Gas mileage is improved too.
I'm awaiting my non restricted ramp plate to see if cruising speed will be ok and if I must go the bigger main jet way.
For information :
The petcock is no longer available.
The chinese like parts don't have the same threads (Honda Vision is 14 x 100 and chinese are 14 x 125 or 14 x 150 sometimes).
I found my petcock in an old Honda dealer's shop, it is not a OEM part. The references are on the packaging if it can be any use to you.
It was collecting dust for many years on the guys shelf and was stuck, but applying vacuum by mouth made it unstick.
I'm wondering how the next petcock fuel issue will be solved...
I got a bargain price : 20Ôé¼ vs 24Ôé¼ on the packaging.
As you may see, the old petcock had lost it's rubber seal...the fuel filter was no longer held in place (I did find a little bit of "sand" in the fuel floater's place). There is a sort of pipe with another tiny filter on top (
![* :*:](./images/smilies/icon_*.gif)
)?
What is that for???
The vacuum connexion is different from the original.
New petcock details :
Old petcock details :
Comparision :
The inside of the tank seems ok (I'm also changing the fuel sender seal on the tank just to be sure) :
As is the fuel sender.
![Image](http://i16.photobucket.com/albums/b24/GSX1400/HONDA%20VISION%2050%20NB%201986/Jaugedessence.jpg)