Joined
·
115 Posts
Hi all,
The last couple of times I have ridden the T140V when hot outside (>90 degree weather) I have had an issue develop about 15-20 min into the ride. Up until that point, no issues. But once the engine starts getting quite hot, it begins to stutter when I crack the throttle 50% or more. Happens in all gears.
The first time it happened, I checked the spark plugs to see if they could tell me anything. They were bone dry, but not obviously discolored. The carbs were hot to the touch (yes, I have the thick o-ring in place).
I searched through the forums here and that led me to think perhaps the bike was running a bit lean leading to overheating, so I adjusted the pilot screws in about 1/4 turn. It helped, but only by prolonging the time it took until this happened again.
I'm leaning towards the fuel still being too lean leading to overheating. Problem is I don't have a choke on the bike to confirm. I could keep trying to richen the mixture (turn air screw in some more, or move the needle clip down a position).
First question: is it safe to ride till I get this sorted out? I don't want to hole a piston.
Second question: is there a better way to diagnosis this then just to "assume" it is too lean, and focus on carb settings?
I am also thinking of putting some phenolic spacers between the manifold and head to try to block some of the heat coming off the cylinder, but that seems to be treating the symptom not problem.
Thank you.
Neal.
The last couple of times I have ridden the T140V when hot outside (>90 degree weather) I have had an issue develop about 15-20 min into the ride. Up until that point, no issues. But once the engine starts getting quite hot, it begins to stutter when I crack the throttle 50% or more. Happens in all gears.
The first time it happened, I checked the spark plugs to see if they could tell me anything. They were bone dry, but not obviously discolored. The carbs were hot to the touch (yes, I have the thick o-ring in place).
I searched through the forums here and that led me to think perhaps the bike was running a bit lean leading to overheating, so I adjusted the pilot screws in about 1/4 turn. It helped, but only by prolonging the time it took until this happened again.
I'm leaning towards the fuel still being too lean leading to overheating. Problem is I don't have a choke on the bike to confirm. I could keep trying to richen the mixture (turn air screw in some more, or move the needle clip down a position).
First question: is it safe to ride till I get this sorted out? I don't want to hole a piston.
Second question: is there a better way to diagnosis this then just to "assume" it is too lean, and focus on carb settings?
I am also thinking of putting some phenolic spacers between the manifold and head to try to block some of the heat coming off the cylinder, but that seems to be treating the symptom not problem.
Thank you.
Neal.