Alright so I have been holding onto this KDX80 engine for the last 10 years I cut it out of a bike to use in an unknown future project, well that project came along and it is a rare 1971 mini Sear riding mower (front engine mounted scaled down)
Now parts are very hard to find, I plan on drag racing this engine and I need to build it up the best I can. Is this the correct factory carb on this engine? MIC?
I would like to put a KX80 carb on it, or possibly a KX100 carb? Would a KX carb have any benefits in performance or just parts availability and reliability? Any mods anyone can think of? I think I will run a an aftermarket coil for a stronger spark, and put a kill switch on the shift linkage so I can shift without throttling back or using the clutch I may even be able to skip 2nd or 3rd gear this way as long as I do not do harm slamming gears (no spark = no load on gear case)
As far as parts availability, that Mikuni VM is probably the most common 2-stroke motorcycle carb in history and is still in production and equipped on new bikes leaving the factory, so you're not gonna do better in that regard.
Common does not always mean good though, this day in age it means cheap and universal. I did not realize they were still being made, I looked into KX carbs and from what I can tell the KX80/85/100/125 all used the same carb.
There must be some differences in the carbs, I read a few threads on people using KX carbs on their larger KDX bikes and getting better response.
