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4-1 w/stock air box?

  • Thread starter Thread starter badbrown
  • Start date Start date
Glad its running better. Do some 1/3, full, and then minimal throttle chop tests and see what the plugs say. Don't rush it. Take your time.
 
To be perfectly honest, if that pipe flows decently and with the airbox lid removed, my experience says that just 1 position richer on the jet needles isn't enough. It is possible, but I just want to mention it so you test and be positive. At 1/3 throttle for the needles. The plugs won't lie if you did an entire tune/jet job correctly and test correctly.
Most of us spend the most time riding on the jet needle and it must be right.
 
Will do.. I feel it could be a touch better in the mid range, but alot smoother than before. Did a long ride yesterday and kept up all day with the other two bikes, just cruising though, but comfortably. I couldn't do that prior. Should I try the pods as well? ( they are sitting on my work bench), or am I on the right path with needle hight/mains/tuning. No plans to get a jet kit or change pilot jets...thanks again for your help.
 
The pods, jetted correctly, will allow a little more power around 6500 rpm to approx' redline. You'll have to change the jet needle e-clip to the richest (bottom) position for sure then. If you like the 3/4 to full throttle performance now and have decent plug reads, then the pods will lean you out enough that you'll also have to richen the mains further. Also, the pilot circuit will need richening and if richer pilot fuel screw adjustments aren't enough, then you'll need a 17.5 pilot jet. Also, removing the two floatbowl vent lines, pods OR filter top removed, is necesssary.
 
Picked up a non running '77 GS550. Cleaned carbs and re installed w/o air box for now. Have some pods. The main jets are 80 and I have the clip set in the middle. It will start and idle but when I blip the throttle it dies and is hard to start afterward. Is there ANYPLACE to find out how to tune a vm22? I can find stuff on the 26 and up but nothing on the 22. Thanks, Slapz
 
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