| Author | Message | ||
     Sportyeric |
Now there's a subject heading that'll get a few looks. After sitting for five years disassembled, my engine is together and runs. For a while. Fuel doesn't flow when the float bowl is on. On the face of the carb, where the three backing-plate screws go in, the other hole is the vent for the bowl, correct? I blew in it and its plugged. I stuck a drill bit in and rotated it (by hand) and got a powder like powdered cement. My guess is that it is a long dead spider's nest. Whatever it is, it shouldn't be in there. My problem now is that I've cleared the horizontal section and I can't find a hole at the bottom that matches. I'm trying to do this while the carb is mounted (for reasons to stupid to get into.) So, can anyone tell me, or better yet post a photo of the "roof" above the float and show me where the vent begins. Or at least confirm that there should be airflow through that hole when the bowl is off. | ||
| Sparky |
There is a vertical passage connecting the horizontal passage. The orifice should be behind the needle jet cluster area. Perhaps a small mirror would help to see in there? I'm looking at the '96 S1 Service Manual Figure 4-3 Fuel Supply System. If you have a Service Manual or can download the pdf file from the BadWeB, you'll see what I mean. | ||
| Sportyeric |
Thanks, Sparky. I have the manual. The diagram is too simplified, I think. I found my mirror. (Boy, dentists are talented to keep track of things seen that way.) There seems to be a small hole on each backside corner. Unfortunately, there is, I think, a horizontal passage that runs for and aft (bike-wise) to connect the holes with the left to right passage that I can access. It is plugged with a cap at the aft side of the carb. I may have to remove that if I can't find a means to dissolve whatever is in there. Perhaps I'll experiment with the crud already removed. | ||
| Sportyeric |
Oh my. I may have been hasty. I drilled out the cap to find no crud there. I then learned that the passage from the front that I was blowing into without success did not go all the way to the back passage I had just opened up. So I stuck a drill bit down there under power and got metal (which I have now drilled through.) So the front passage (left to right) now connects to the rear passage (running for and aft)which now has a hole needing patching. What was the purpose of the metal obstruction in the "vent" hole? Hindsight being 20/20, I check the S2's carb to discover that it also has an obstruction there. Where does that passsage go? Not into the top vacuum chamber. I may be posting for a used carb. (Message edited by Sportyeric on March 04, 2009) | ||
| Kilroy |
I've got a stock carb sitting on the shelf if you need it. Send me a PM if it comes to that - Kilroy | ||
| Sparky |
Back to the first problem, can you take a can of carb cleaner spray with a flexible tube and aim the tube up into the small holes at the backside corners of the float area roof in order to see where/if the stuff comes out? | ||
| Sportyeric |
Thanks for the offer, Tom. We'll see what comes about. And good idea but too late, Sparky. Hindsight again. Rather than blowing into the vent from the throat end, I should have blown in the fuel line. I suspect that the metal that I drilled through inside the vent probably was a partial plug with a small hole in it to maybe minimize vacuum at the carb throat from transferring to the float chamber. Assuming there was a small hole there, if I had blown from the opposite direction, I may have dislodged the remainder of the crud which theoretically was blocking the hypothesized hole. It would be handy to have the tool that doctors use to look in one's ears to look down the vent tube on the Buell and see if that guess is correct. I wonder if I could borrow one. The only practicing doctor I know was someone I dated a few years ago. My current love would probably object to that. In any case, I now have airflow from the fuel line, through the bowl and out through the vent aperature. I'll be reassembling tonight and taking a short test ride tomorrow. |
