It’s interesting looking at you guys and your thoughts on this motor. We have ran the Ka100 for 2 years and have found it to be a great motor. As we have had it longer down here engine builders have had a long time to play with it and you will rarely find an egt probe on any exhausts. Nearly everyone runs a lambda probe. The tillotsen Carby works great compared to the garbage we first had to endure. From the lambda we can get the tune to the figures we are after with ease. These motors are all about the tune and I have read somewhere regarding gearing being of little relevance, this is correct. You can drop 6 teeth and have a similar time. The variations between different drivers gearing can be huge but it works. More time is spent looking however at low end rpm rather than top. As for maintenance we shouldn’t but most disconnect the kill switch as it has caused small issues at times. The less electrical the less issues. Rarely any plugs getting fouled. You want to look at your bottom end bearings most here change them to something more substantial, not ceramic they are illegal. Drop off from top end starts about 6-8hrs before you should maybe look at piston and rings. Most competitors will use iritops. Overall the engine is strong quick & robust and you don’t hear many failures at all and if they let go it’s usually the standard maintenance hasn’t been kept up. Competition wise it’s really coming down to driver and setup which is a win in karting.