I have been agonizing over the last couple of weeks due to a misfire and loss of power on my Katana. I found the problem (fuel tap not sending enough fuel) but while searching for the fault, I took the carb's off, gave the bottom end a bit of a clean and put them back on. The clean was really just getting any crud out of the jets and bowls. While the carbs were off I bought some pods and put them on while the airbox was out of the chasis. Now that I have remedied the fuel problem, I need to tune the carb's again. Here come the silly questions.
Dumb question number 1 -When adjusting the pilot air screw, everybody mentions 1½ turns out. I usually do this by ear on my single but with 4 carb's it a bit hard. The crux of the question is : is one turn flat to flat with a screwdriver (180°) or is it two turns flat to flat (360°). See, I told you it would sound dumb!
Dumb question number 2 - There is a visible screw underneith the carb near the inlet manifold boot. What is a good starting point for this screw. Is it a fuel screw? I have looked at the diagram on the Sudco site for the VM29 carb and I can't find the said screw. I see the main jet, then the pilot jet but I would expect to see another behind them and that one is exposed outside of the float bowl for adjustment.
Dumb question number 3 - The SUDCO site says the main jet size for the Suzuki 1000cc engines is #115. I noted the size of my mains while the carbs were apart and mine are 110.5. The bike has 4 into 1 exhaust and pod filters. Should I do any work with the mains? That being said, I did not have any problems with the 110.5's before cleaning the carb's but I did not know if I could unleash any potential power with a main jet swap.
Dumb question number 4 - I would like to get my float levels spot on. How do I measure the gap for the floats. I have seen measurments given on other threads but from where to where are the measurement taken?
For those of you who have not slashed your wrists while reading these questions, any input would be greatly appreciated.
All the best,
Scott.
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