| Author | Message | ||
     Ulybagger |
How would one diagnose for a leaky intake manifold on a Ulysses? I would like to rule that out before messing with the timing. | ||
| Teeps |
The service manual says to use propane to test for a leak. | ||
| 44mag |
This is how I would do it. Maybe somebody has a better procedure. 1. Connect a hose up to a small propane tank. You can buy a small propane torch and some plastic tubing. 2. Idle the bike 3. CAREFULLY blow propane up from under the frame under the intake (under where the air filter is) 4. Make sure that you stay away from the air intake at the top near the gas cap 5. Listen for an idle change. If there is an intake leak, the propane will get into the mixture and increase the idle 6. I would not let the bike get too hot because I am paranoid about igniting the propane You should check the timing. It is slightly more complicated than checking the oil. | ||
| Davo |
Remove the right side cover and the left scoop to get to the intake. Make sure you get run the propane through a regulated source like a screw on torch. I taped the air intake at the base of the torch so pure propane w/o air comes out the tip. Then get a rubber hose that will slip over the torch tip. Carefully with a limited amount of propane follow the perimeter of the intake where in enters the head. The propane is far more controllable and stable than the gas in the tank. Just use caution and I would do the procedure in the outdoors. | ||
| Fubar |
In the olden days we used carb cleaner. Is that no longer in vogue? fubar | ||
| Javadog |
Carb cleaner is so prehistoric. I was thinking about stopping up the air intake with an old sock, then running propane from a gas grill tank, and O2 from an oxygen tank borrowed from work into the intake manifold. I'd have a real stump jumper then. | ||
| Fubar |
Prehistoric? Yeah...probably. My oldest son has called me a "relic". I guess he's right. fubar | ||
| Jackbequick |
WD-40 in the aerosol can was another popular choice for testing for intake leaks. You'd hear the RPM change or drop a little when it was sucked into the inlet stream. And it would evaporate away or could be wiped up to take some grime away with the residue. Jack |
