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Scudrunner

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  1. Scudrunner
    My bike still won't run off of full choke. I opened the air box and looked down into the carbs and adjusted the throttle plates to just be cracked open starting with matching number one to number two, then three and four alike. I assume that when they are all in sync that the idle speed will adjust all four carbs the same. Question: In the airbox there is a tube that is connected to a rubber hose leading downward to the engine. Is that hose in the airbox just left open without being attached to anything?
  2. Scudrunner
    Just want to add my thanks to my fellow Venturers for helping in solving carb problems for those of us at our wits end. I haven't had time to work on mine yet but I am printing out the tips and hope to find the solution in them. Thanks again for all of you who take the time to assist with your past experiences.
  3. Scudrunner
    Thanks for all the ideas guys. I'm going to try the least invasive things first before I start pulling the carbs off. I'll try pulling one plug wire off while idling to see if I have a problem in that area. I used to do that with cars to isolate a bad cylinder and then check from there wheater it's a plug, wire, etc. Will also spray around the carb boots with carb cleaner and a fire extinguisher! Since the bike sat for awhile a few years ago it was also suggested to pull the seat and tank sending unit to check for rust in the tank which might be clogging up the jets in the carb. I"ll report on what I find and thanks again for all the suggestion.
  4. Scudrunner
    Took my !st Gen RV to the JAX M&E yesterday and Chicken Hawk was kind enough to bring his Carbtune tool to sync my carbs. When connected to the carbs and with the bike warmed up and idling about 1000 rpms the tool barely showed any vacumn reading until revd up. The bike idles ok and accelerates fine with the only problem being a somewhat slow throttle response but it is just not exactly smooth. I had taken the carbs apart in the past and cleaned out the jets and passages, the diaphrams are free of pinholes but probably original. Tried the Seafoam treatment and some suggested checking the tank for any rust although I recently change the gas filter and didn't see a lot of garbage in the old one. I just don't understand what could cause the low vacumn reading which is preventing me from syncing the carbs which I feel is all it needs to run better. I have no problem driving it like it is but would like to put the plastics back on. Can anyone shed some light on this issue? Oh, and BTW, the bike only has 16,000 miles on it.
  5. Scudrunner
    I sprayed carb cleaner around the base of the carb to hose area without any change but I haven't tried the top by the airbox yet. As a comment, I have to really crank in full choke to get this bike started and have to hold it there for awhile before I even think of releasing any choke. The low end get up and go is not good but once you get up to about 3000 rpms she runs fine and cruises highway speed well. Lately it has a tendency to idle too low and even die out which I was thinking due to the ethanol blend we have in the gas. Will check the upper hose areas for leakage next although the battery is now petering out and will have to be replaced also.
  6. Scudrunner
    The gauges are a new older set of 4 vac gauges with hoses and simple valves on each. I put another gauge I have on one of the hoses and it acted the same way. I could feel vacumn at the hose end when I disconnected it from the gauge but it wasn't very much. Since thinking about it today I'm going to pull the hose off the carb and see what kind of pressure I get there. Perhaps the diameter of the hoses are too small and being older they may be collapsing. Also, according to the manual it calls for about 9 in of mg. which is much less than an auto would pull. Reading this thread about drilling hole in the filter cover makes me curious. When I first start the beast I have to use full choke and let it run for awhile. if I ease off on the choke or try to give it a little gas she will die. It's not that cold out but it will do this all the time. Is this normal for this gen 1 bike?
  7. Scudrunner
    I realize this is an older thread but has anyone else had a similar experience of very low vacumn readings in the carbs while doing a sync job? It seems like my rear cylinders fire first and then after about 20 seconds or more the front cyls come online. This 84 sat for awhile but I cleaned it up and it ran last year ok except for needing to raise the rpms up to get all cyls firing, then it screams well. Thought syncing the carbs would work but can't get a reading on the gauges. (older dial type)
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