Checked carby & reed valves & they look ok
Hi, check the throttle slide is at the bottom with just a small gap, if its higher, check your throttle cable, if they are ok you might have some dirt in the jets, youneed to clean the the inside bottom of the carb and blow the jets out with an air line. good luck.
Check for a vacuum leak i.e. carb base gasket and other hoses
SOURCE: How to check my oil level on 04 Yamaha yzf 600
YZF600R is a carbureted model. OIL: The oil sight glass is a round window, low on the right side. Very hard to try to see when astride the bike, even if you use a mirror on an extension rod. Have a friend hold the bike level,perhaps, while you check. Oil should be sighted after the bike has been sitting for a time after riding. I suggest using a good 10W-40 regular motorcycle oil (Least expensive around here in Boston is to buy Kawasaki by the gallon at Riverside) I found the pesky 1st-to-2nd shift to be more direct with this oil than with synthetic. I had plenty of opportunity to compare the two types. GAS: No reserve, but as noted, there is a low fuel light, in the row of lights that includes the neutral light and the high beam indicator. You ought to be getting over 50 m.p.g., so you can estimate your 'range' from that. I usually fill up again around the 180 mile period. I think I've seen the low fuel light once in 6 years of ownership. OH: I suggest you treat the gas, on a regular basis, with 'marine' Stabil, not the regular stuff. I have had a 'gummy' Yamaha Virago 250 to care for, that I thought would never clear its fuel problems. Last winter ('08-'09) stored it with the marine Stabil in the tank and run for a while to get it into the carbs also. Within a few minutes of running it this spring-actually a couple weeks ago- it smoothed out and has run fine since. I believe this HAS to be as a result of the treatment of the fuel (run through the carbs before the winter storage) with this special Stabil. It was recommended by Carlo at Riverside- I'll have to remember to thank him for the advice. N.B. I always change the fuel (siphon it out, put that Stabil'ed but 'old' stuff into my car tank, refill the bikes with fresh 93 octane) each Spring.
SOURCE: 2002 YAMAHA BANSHEE WILL NOT REV
I have a 2004 banshee at the yamaha dealer being worked on.It would not run when i took it up there they cleaned the carbs and put it back together it will start but when you rev it, it holds itself wide open and wont shut down unless you pull the plug wires.they also checked the floats in the carbs said they where ok. they think it is a vent issue with the gas tank or the fuel shut off valve.IS THAT POSSIBLE
SOURCE: power valve position and installation for yz 125
The proper adjustment is achieved when the notch in the actuator lines up with the pin hole in the cylinder casting.
SOURCE: i have 1974 yamaha dt 250 enduro the bike sat
clean contacts on points with sandpaper (800 grit). located behind flywheel, will gurantee a fix. you can remove the side cover and get to contacts through holes in flywheel without removing it.
SOURCE: Power Loss at around 3000 rpm
weak spark plug.......check with another spark plug.if the probelm cleared.replace the spark plug....
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