I ran across your video when I was looking for how to turn off a fuel petcock on a 1990 Suzuki Quadrunner, after I noticed leaking fuel and a very full crankcase. Yup, full of gas! After eliminating the needle and float, your video got me thinking. I went right to a cycle dealer and got that Yamaha petcock. So far it seems to do the trick. One difference is, some bikes like mine have two vacuum lines. One goes to the fuel pump and that one needs to be re-attached or it won't run for very long. The other can be plugged.
@@gio.rodriguez The fuel flows from the petcock UP to the fuel pump under the left front fender . It exits the fuel pump and follows along the air intake and back down to the carb (talk about a detour). The carb on these lil guys has two vac ports on the carb just before the cylinder head. My guess is the one was pulling gas through that diaphragm and dumping it into the cylinder, filling my crankcase. I capped that one off. The other vac line goes back up to the fuel pump. I just reattached that one to it's stock location on the carb. Without it, the bike ran fine but only for a short time, probably until the bowl ran out of fuel. Since the pump works well, I just left it in the system. Gravity may not work well since the carb sits much higher then the petcock on these 4wd Quadrunners. I hope I was clear enough.
I ran across your video when I was looking for how to turn off a fuel petcock on a 1990 Suzuki Quadrunner, after I noticed leaking fuel and a very full crankcase. Yup, full of gas! After eliminating the needle and float, your video got me thinking. I went right to a cycle dealer and got that Yamaha petcock. So far it seems to do the trick. One difference is, some bikes like mine have two vacuum lines. One goes to the fuel pump and that one needs to be re-attached or it won't run for very long. The other can be plugged.
I'm glad this video was able to help you! Where did you re-attach the line that went to the fuel pump?
@@gio.rodriguez The fuel flows from the petcock UP to the fuel pump under the left front fender . It exits the fuel pump and follows along the air intake and back down to the carb (talk about a detour). The carb on these lil guys has two vac ports on the carb just before the cylinder head. My guess is the one was pulling gas through that diaphragm and dumping it into the cylinder, filling my crankcase. I capped that one off. The other vac line goes back up to the fuel pump. I just reattached that one to it's stock location on the carb. Without it, the bike ran fine but only for a short time, probably until the bowl ran out of fuel. Since the pump works well, I just left it in the system. Gravity may not work well since the carb sits much higher then the petcock on these 4wd Quadrunners. I hope I was clear enough.
Nice work
I liked your video and how to teach.
Where did you get the panels from i have the same quad need new white panels
Do you happen to know if this vacuum delete would work on a 2007 ltz400?
@@darmat1993 I’m pretty sure it’s the same as this 2003 ltz400 that I did: ruclips.net/video/ps3sPZ9Syao/видео.html
@@gio.rodriguez sorry for the late response... Just seen your reply. Thank you. Ordered the part. 👍