skeptical old git
I like your thinking! The tricky bit if figuring out the length of the srping when everything is assembled.Grader said:Are you able to estimate the working lengths of the spring by measuring the parts? (max length and min length)
If I have understood the problem it is that the choke does not get stuck fully open but more in a part open condition. If this is the case we should try to select a spring that gives more force in this part of the movement (ie same rate but greater free lengh to give more preload)
For the sake of argument, lets say the spring (which has a free length of 21mm) is compressed to 18mm when it is on the choke cable and the cable is connected to the plunger. We could probably measure that. But then when the cable is connected to the carb, it could then be compressed to say 15mm. That would mean the working length is from 6mm to 15mm. But it would be hard to measure how much the spring is compressed when it's all fully assembled :?
We can estimate from the cable at the lever? We know the spring compressed to 6mm when the lever is pulled right back. We also know that there is slack in the cable when the lever is pushed forward - at this point the spring must be extended as far as it can go.
If we could measure the cable movement, from the point where it's pulled as far back as it will go to the point where it starts to go slack, we know the the range the spring's working over. This would probably be easier with the lever disconnected.
e.g. if the cable movement is 10mm then the spring is going from 6mm to 16mm.
Now all we need is a AT that has the choke working correctly and we can measure it! If we rule out bikes (like mine) bodged with biro springs, bikes with the choke disabled, bikes that never have the choke used so that it's seized off, and bikes that have chokes that are slightly stuck...
.. is there any AT out there suitable for this :lol: