trying to get this sled up and running better. it runs/idles fine, maybe a little high, but starting off it really bogs out then jumps up. it also seems to do the same/reverse on slow down. when i let off the throttle it keeps going then slows. i guess i would call it a big "delay" on both ends. it has been converted to mixed gas and a primer has been added. on a stand it seems better but still has the delay. when i pull the plugs after a run they seem wetter than i think they should be. cylinder pressure measures good
i usually start with a good carb clean out but it seem to idle fine.
am i looking at an issue from the switch to mixed gas or is a clutch rebuild in order?
or is it even worse...
i usually start with a good carb clean out but it seem to idle fine.
am i looking at an issue from the switch to mixed gas or is a clutch rebuild in order?
or is it even worse...
Yamaha440
Member
I would start by cleaning the carb, it sounds like is leaning out a bit on the slow circuit.
Sounds like a clutch problem worn belt.
The secondary clutch could be sticking and not shifting its staying in high gear.
thanks for the help
carb is soaking (easy enough to do)
clutch coming off when this weather warms a bit
are there clutch diagrams avail any where?
carb is soaking (easy enough to do)
clutch coming off when this weather warms a bit
are there clutch diagrams avail any where?
yamaha microfitch or if you could find a repair manual .those clutches are very simple not hard to matenance.
kallio
New member
did you find the problem?