For once I will not resolve to flaming and actually make a coherent well thought out post in response to oil injection removal on Tomos.
I really think you are a cool guy, your travels sound like a helluva experience and one day hope to do something similar. Your Tomos has been an obviously very reliable machine.
Although this is not the case with the hundreds of other tomos' who have had their oil injection systems fail and unknowingly seize while riding.
Yes, an oil injection system is CONVENIENT. Although the slightest complication (clogging, forgetting to fill the tank, leaking etc.) will result in damaging your ped and not even knowing it.
So, even lets say the oil injection system ARE good (like yours)...many people who ride their moped daily as their main form of transportation remove it to totally ELIMINATE one less variable that could go wrong in their daily commute. Good idea isn't it?
With pre-mixing, you GUARANTEE you get the right ratio your ped needs to run in a desired fashion (for performance, for reliability, for w/e). No matter how good oil injection can be, parts still break, user error or not. Yes, it may take an EXTRA 1 minute out of your day to fill a pre-measured bottle of oil for your next tank fill. But its not all that messy, you just pour it into your tank and then fill with gas. Whats so hard?
Also, many people run a kit on their ped which requires running a little bit richer. The oil injection system is designed to inject only a certain ratio and nothing else. Therefore it cannot be utilized anyhow in this scenario.
Yes, you argue that they MAY fail due to user error damaging them. Although would this become a problem at all if the oil injection did not exist? People RIDE their mopeds and bang them up, thats life. If that is the cause of this oil injection failure, thats more the reason to remove them.
My 2 cents.