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Lots of questions, but here's the story so far. A basket case '80 XS 850 Special. The guy went to rebuild the motor and as far as I know, did the bottom end right, but he ended up puting a 750 head on it which has smaller valves, but he was told they are interchangeable. I need to ask him if he used the cams of the 850 or the 750... anyone know of a difference or which would be better for him performance-wise? Anyway, he had it running for a couple hundred miles, but said it wasn't right. He thought carbs, but everyone else told him timing, so he went in and readjusted the timing (No idea how many times) and it has never ran again. It has currently had sit-itis for 4-5 years.
I am currently tearing into the carbs. I have them apart. All the jets have little O-rings around them. Will the general ones I find at the hardware store work for them? Also, someone has mufffed up the tops of the jets some trying to grab them with plyers. Is this something that has to be flat, flush, and even like the floats? It's the sides of the jets that face the bowls that don't give you much to grab on to pull them out, but doesn't appear to have any affect on the actual orifice or function of the jet.
Money, as always, is a major concern, but with this guy, it's a hard luck story, but it applies even more so to him. He has none, and I am trying to help him get going as absolutely cheaply as possible. I am also wondering about what size jets he should be running with this 750 head? The jets I am pulling out are two size 40 jets and one size 140 main jet in each carb. It would seem to me that it would run rich with the smaller valves, but I think I will add the pod filters that I have here.. that should lean it up some.
I have many more questions, but will end it here for now. Any help would be great.
Tod
Here's a few pictures... including the rat's nest in the air box I found.
Lots of questions, but here's the story so far. A basket case '80 XS 850 Special. The guy went to rebuild the motor and as far as I know, did the bottom end right, but he ended up puting a 750 head on it which has smaller valves, but he was told they are interchangeable. I need to ask him if he used the cams of the 850 or the 750... anyone know of a difference or which would be better for him performance-wise? Anyway, he had it running for a couple hundred miles, but said it wasn't right. He thought carbs, but everyone else told him timing, so he went in and readjusted the timing (No idea how many times) and it has never ran again. It has currently had sit-itis for 4-5 years.
I am currently tearing into the carbs. I have them apart. All the jets have little O-rings around them. Will the general ones I find at the hardware store work for them? Also, someone has mufffed up the tops of the jets some trying to grab them with plyers. Is this something that has to be flat, flush, and even like the floats? It's the sides of the jets that face the bowls that don't give you much to grab on to pull them out, but doesn't appear to have any affect on the actual orifice or function of the jet.
Money, as always, is a major concern, but with this guy, it's a hard luck story, but it applies even more so to him. He has none, and I am trying to help him get going as absolutely cheaply as possible. I am also wondering about what size jets he should be running with this 750 head? The jets I am pulling out are two size 40 jets and one size 140 main jet in each carb. It would seem to me that it would run rich with the smaller valves, but I think I will add the pod filters that I have here.. that should lean it up some.
I have many more questions, but will end it here for now. Any help would be great.
Tod
Here's a few pictures... including the rat's nest in the air box I found.
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