Acceleration problem
Zorba:
Could be the vent hose under the tank, diaphram leak or dirty jets, from 1/2 throttle on your "main jets" control the bike , did you put and "Air kit and pipes on it?
Beer van Huet:
The bike is standard as far as carbs, jets and pipes are concerned. I have taken the vacuum actuator apart from my electronic cruise control because I had a stuck vacuum solenoid valve. I had to take the airfilter box off to get to the actuator. I also ran thru all my electric wiring in trying to fix my cruise control. I noticed that I the hoses from the airfilter to the carbs were not completely fitting the first time I reassembled the airbox, so I fixed that the second time. I also *&^% up the first time by switching the low voltage leads to the 1-2 coil. So I think the air- and ignition are OK now. The bike seems to starve with full throttle. Either the vacuum line ends are worn because I have taken them off so many times now or the fuel valve is (suddenly?) the issue. I will check and clean it. I am reluctant to open the carbs for the first time, since that involves synchronization, special tools and a lot of work. Is there any 'easy way' to check/clean the jets without taking the carbs completely apart? Where exactly do the main jets differ in operation ( as far as inputs are concerned) from the stationary/idle ones? This may lead to my problem.
TIA
Beer
R J:
When was the last time you replaced all your vacuum lines?
They get old and brittle and crack.
I change mine about every 2nd year of riding.
Just replace them all, no need to try and determine which one is leaking vacuum on ya......
Beer van Huet:
Bike is 8 years old; never replaced any of the vacuum lines. You have a point there.
John U.:
The main jets are metered by the jet needles which are tapered and extend into the jet. As the throttle is opened the jet needles are withdrawn, allowing more fuel to pass. However, the main jets being much larger than the slow jets rarely get clogged. The slow jets are operating (meaning allowing gas to flow) at all throttle settings and have a fixed rather than variable metering.
Try some Seafoam or Techron 1 can to no more than 1/2 tank if the jest are partially gummed up that will prbably take care of it.
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