if you had dirt on the small net, you may some dirt on the small niddle+spring under the black diaphram !!!!
1.make sur no holes are on the diaphram, should be only one in the middle normaly!!!
2. remove diaphram and clean the niddle+spring - this is a major fuel pass in the carb.
3. do you get a spark at the plug?
4. ch battery fully charged??!!1
5. plug gap is normal - not to big/small use a fillergouge!!!!
6. oil/fuel mix is correct - zenoha is 2.8% oil. chechk the manual to be sure!!!
7.needle seeting: both should be open 1.5 trund from spring stop this is the limit!!! do not pass this stage!!! than you start to adjust over that as needed. try be rich as possible for the first 3-4 times, than reduce accordence to need!!

safe landings
gadi.