85 VF500F idle ??!!

synaptik · 12-18-2007, 07:19 PM

where should a warm idle for the 85 vf500f be at. mine sits at about 3500 rpm at all times is there a way to back it off a bit lower?

i do have a stage 2 jet kit in it ...

30k miles

valves and carbs recently cleaned and jetted

masonv45 · 12-19-2007, 07:35 AM

Check your manual, but I'm guessing it should be somewhere between 1100 and 1200.

There should be a black knob under your carbs (probably the right side) that allows you to raise and lower your idle.

Turning the knob clockwise raises the rpm.

It takes only a little turn to change the idle. I think a full turn will lower it about 1,500 rpm.

If you turn the knob and the idle will not lower, then you may have some issues:

1. Throttle linkage binding
2. Brass choke valves not closing completely
3. Bad carb sync (2 carbs pulling the rest up to the high idle)

If the idle constantly changes almost everytime you stop, you need a carb sync.

synaptik · 12-19-2007, 11:23 AM

thanks i will look into it ... of course i didnt get a manual yet ... and will be a bit till i get a shop manual prob a clymers ....

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12-18-2007, 07:19 PM	#1 (permalink)
synaptik Member Join Date: Dec 2007 Last Online: 04-03-2008 09:44 PM Location: north of dallas Texas My Ride: 2001 Honda Shadow Ace Deluxe 750 1985 Honda VF500F Interceptor Posts: 46 Thanks: 0 Thanked 0 Times in 0 Posts	85 VF500F idle ??!! where should a warm idle for the 85 vf500f be at. mine sits at about 3500 rpm at all times is there a way to back it off a bit lower? i do have a stage 2 jet kit in it ... 30k miles valves and carbs recently cleaned and jetted

12-19-2007, 07:35 AM	#2 (permalink)
masonv45 Senior Member Join Date: Apr 2007 Last Online: Yesterday 11:27 AM My Ride: 1985 VF700F Posts: 694 Thanks: 0 Thanked 17 Times in 16 Posts	Check your manual, but I'm guessing it should be somewhere between 1100 and 1200. There should be a black knob under your carbs (probably the right side) that allows you to raise and lower your idle. Turning the knob clockwise raises the rpm. It takes only a little turn to change the idle. I think a full turn will lower it about 1,500 rpm. If you turn the knob and the idle will not lower, then you may have some issues: 1. Throttle linkage binding 2. Brass choke valves not closing completely 3. Bad carb sync (2 carbs pulling the rest up to the high idle) If the idle constantly changes almost everytime you stop, you need a carb sync. __________________ 1985 VF700F 1983 V45 Magna Gone but not Forgotten Memphis, TN

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12-19-2007, 11:23 AM	#3 (permalink)
synaptik Member Join Date: Dec 2007 Last Online: 04-03-2008 09:44 PM Location: north of dallas Texas My Ride: 2001 Honda Shadow Ace Deluxe 750 1985 Honda VF500F Interceptor Posts: 46 Thanks: 0 Thanked 0 Times in 0 Posts	thanks i will look into it ... of course i didnt get a manual yet ... and will be a bit till i get a shop manual prob a clymers ....