Baotian BT125T 2 Ep 2 Troubleshooting electrical problems

BT125T-2 Ep.2 electric problems
Baotian BT125T-2 Episode. 2, check out episode 1 if you’ve missed it!
Finding rubber hose in intake valve! Under intake manifold.
Also troubleshooting electrical problems, loose connections
Switches not working?
Starter relay problems?
Short circuit somewhere
Electric start motor do not work.
Brake switch is broken.
Test vacuum diaphragm plunger assembly with staubsauger suction machine.
Starter button don’t work.
Carburetor PD24J (No. VE KGC 27)
Pilot Jet size 36 (K36)
Main jet size looks like 108, cleaning it.
Testing GY6 carburetor vacuum diaphragm with a vacuum cleaner.