Hello all! This is my first post!
I am new to the XS650, but apparently these cool bikes have a wonderful community behind them. I've been looking at and following post on this amazing forum for a little while now, but this is the first issue I've had that I feel the need to make a post in hopes that one of you that have far more experience with these than I do can maybe point me in the right direction.
I'm working on a this 1976 XS650 for a friend of a friend. I don't know much about it's past or what has been done to it previously because the guy just bought it somewhat recently. It had been sitting for a while before that according to him.
Basically all that I have done to it is install the forwarding control kit, cleaned up some wiring issues, put a new front master cylinder and caliper, re-welded the flange collars on the aftermarket "ya mamma" exhaust, and installed the Niche Cycles Makuni VM34 carb conversion kit.
This thing fires right up now, but when started, it immediately has a very high and consistent rev regardless of whether or not the chokes are engaged. There is no tach, but if I were guessing I would say probably around 3500-4500 rpm, give or take. It's high enough that I don't even like to leave it running too long. The idle adjustments on the carbs seem to do little or nothing at all. I have not attempted to re jet it yet, but can't imagine that would cause this issue. It doesn't appear to have any vacuum leaks that I've noticed, especially given that everything from the new machined billet intakes back are brand new. The ATU (automatic timing) also appears to be functioning as it should. It appears to also have an aftermarket Pamco electric ignition setup.
What am I missing here? Could the advance rod possibly be the issue? What on earth would cause this thing to idle so high? I haven't cracked into the engine yet to check valves or timing chain tension. I wanted.to ask for advice here first before I started in on that. I wanted to include a couple of videos to give ya'll an idea of what's going on, but it said the "File is too large for the server to process" and that "The uploaded file does not have an allowed extension," whatever all that means.
Any expertise or help from you guys as to what I should look into or what could be the cause of this would be GREATLY appreciated!!
I will try and figure out how to post the videos in the mean time.
Edit: Links to videos
I am new to the XS650, but apparently these cool bikes have a wonderful community behind them. I've been looking at and following post on this amazing forum for a little while now, but this is the first issue I've had that I feel the need to make a post in hopes that one of you that have far more experience with these than I do can maybe point me in the right direction.
I'm working on a this 1976 XS650 for a friend of a friend. I don't know much about it's past or what has been done to it previously because the guy just bought it somewhat recently. It had been sitting for a while before that according to him.
Basically all that I have done to it is install the forwarding control kit, cleaned up some wiring issues, put a new front master cylinder and caliper, re-welded the flange collars on the aftermarket "ya mamma" exhaust, and installed the Niche Cycles Makuni VM34 carb conversion kit.
This thing fires right up now, but when started, it immediately has a very high and consistent rev regardless of whether or not the chokes are engaged. There is no tach, but if I were guessing I would say probably around 3500-4500 rpm, give or take. It's high enough that I don't even like to leave it running too long. The idle adjustments on the carbs seem to do little or nothing at all. I have not attempted to re jet it yet, but can't imagine that would cause this issue. It doesn't appear to have any vacuum leaks that I've noticed, especially given that everything from the new machined billet intakes back are brand new. The ATU (automatic timing) also appears to be functioning as it should. It appears to also have an aftermarket Pamco electric ignition setup.
What am I missing here? Could the advance rod possibly be the issue? What on earth would cause this thing to idle so high? I haven't cracked into the engine yet to check valves or timing chain tension. I wanted.to ask for advice here first before I started in on that. I wanted to include a couple of videos to give ya'll an idea of what's going on, but it said the "File is too large for the server to process" and that "The uploaded file does not have an allowed extension," whatever all that means.
Any expertise or help from you guys as to what I should look into or what could be the cause of this would be GREATLY appreciated!!
I will try and figure out how to post the videos in the mean time.
Edit: Links to videos
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