When my tomos A35 engine is cold is doesn't as good as normally when stationary, not very strange though. But sometimes you must adjust your mixture screw to keep the engine running in idle mode and have no tools at hand. This is for those moments, no more botching with keys, instead with a keychain you can always carry with you.
Photos will follow soon.
Print 5 top solid layers when printing at 15% infill. Also print at low speed and maximum cooling. When printing with PLA don't use heated bed, maybe for the first layer only. Alternatively you could print it together with a bigger task to let the print cool down after each layer.