I run in a 80 shifter class so I might be a little influenced to say an 80/85 would be a better choice for your first shifter.

I know the idea of an electric start sound really convenient, but the cost of the top end kit alone will cost real close to what you can rebuild an 80/85 top AND bottom end, and if something does break, dollar signs start flying.

get an 80, they are cheap, you can find great deals on them, and you can pick up a spare engine for the price of a replacement crank for that TM k9!

Just my two cents…

I run tms and wouldnt worry about having to ever replace a crank, rod and bearings yes. That electric tm is all different inside and parts are special because of the electric start the engine is detuned to be able to start so it wont run with a non electric engine if thats not a problem for you and you want it for fun I would say go ahead.

No TM K9 is ‘sought after’

This is kind of like RE.  Location, location, & location are all important factors.  If you live an area where TM’s are supported, then you’re GTG.  If not, top-end maintenance is easy (@ 130 L fuel), while changing the bottom end bearings (@ 330 L) requires more knowledge & the right tools/equipment.  Having a shop that can help support you when you need it should be a real consideration.

I have a K9ES, & it’s a really nice shifter motor (I think).  The “detuning”, as such, was done with the goal of reducing maintenance intervals.  Boost ports were eliminated to improve mid-range (costing some top end); bottom-end crank & bearings are +2 mm larger diam to improve durability; 13.8K ignition rev limit, & then of course the e-start, which actually works nicely & is hassle-free.  I put a tender on the battery & leave it over the winter.