Here is something i was not aware of..( I own a jabiriru and love it) was at work today (ypjt)and saw a lame working on a r22 so stoped for a chat and asked wot he was doing.. To my suprise he was checking for sticking valves as per manual (every 300hrs) as the oil/fuel sizzles on stem seals and causes deposits to form potentially causing a sticky valve... So dont mater how much ur engine costs,they all have similar pronlems,,( stick to the inspections and dont scrimp and i reckon u got the same chance of a faliure as any other engine else... Its a shame somthing so cheap and more than reasonbly reliable is bieng Pushed to potentially not existing anymore by the people who asked for cheap affordable avistion because the 2stroke was unreliable and thirsty (lmao)...On another note there is an aircraft at thar airport with a jab engine in ( vh experimental) and i was taliking to the guy the other day about jabs, he said he had not done most of the s/b on the engine as he thought not needed ( choose wot he thought was needed ....WTF.... I say most jabs later problems are poor maintainece of older not updated engines....