Eleven
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All my questions have been aimed at tracing a slight miss that is developing (except the one about hard starting which I suspect is related). The engine felt lumpy a month or so ago and then I have noticed a bit of a miss. When I accelerate it revs nicely but at a steady pace it gets bumpy again.
To date on my SV I have done this:
New plugs (old ones were clean and looked a bit lean but changed then anyway. I mentioned a few weeks ago that I thought I was oiling plug but have not seen evidence of that with the new ones), new wires, swapped the Pertronix coil for another (did nothing so the Pertronix is back in), adjusted the valves, reset the float, went through the Weber carb jetting and found some wide variances, corrected those. Reset the choke so be sure that it opened all the way up. Timed the engine. Upped the fuel pressure, was a bit low. Cylinder pressure is: #1 120, #2 123, # # 115 ( or a bit more), #4 110. All are very low and #4 looks discouraging but I don't think any of these numbers will cause a miss, just poor performance.
So, I noticed two things:
When a plug wire is disconnected the primary terminal arcs to the coil casing. It did this with the substitute coil also so am not sure that is an issue.
The when I put my hand over the oil fill cap, I get a fair amount of blowing. I placed a dollar bill at the exhaust pipe and it did not suck it in. Years ago I was taught that if there was good pressure in the valve cover, yo probably had an intake seal of guide going bad. Is that true?
To date on my SV I have done this:
New plugs (old ones were clean and looked a bit lean but changed then anyway. I mentioned a few weeks ago that I thought I was oiling plug but have not seen evidence of that with the new ones), new wires, swapped the Pertronix coil for another (did nothing so the Pertronix is back in), adjusted the valves, reset the float, went through the Weber carb jetting and found some wide variances, corrected those. Reset the choke so be sure that it opened all the way up. Timed the engine. Upped the fuel pressure, was a bit low. Cylinder pressure is: #1 120, #2 123, # # 115 ( or a bit more), #4 110. All are very low and #4 looks discouraging but I don't think any of these numbers will cause a miss, just poor performance.
So, I noticed two things:
When a plug wire is disconnected the primary terminal arcs to the coil casing. It did this with the substitute coil also so am not sure that is an issue.
The when I put my hand over the oil fill cap, I get a fair amount of blowing. I placed a dollar bill at the exhaust pipe and it did not suck it in. Years ago I was taught that if there was good pressure in the valve cover, yo probably had an intake seal of guide going bad. Is that true?