If you don't have a timing light
, there is a spark plug tester in Amazon https://www.amazon.com/MIKKUPPA-Inline-Tester-Motorcycles-Vehicles/dp/B07VB239SC/?ots=1&slotNum=0&imprToken=b0bf7fd7-54e7-439d-7f6&tag=fhmeag-20
you have to take the spark wire off from the spar plug and put the spark plug tester in, crack the engine, if the tester is not lighting up, there is a problem from the high voltage supply or circuit https://www.amazon.com/MIKKUPPA-Inline-Tester-Motorcycles-Vehicles/dp/B07VB239SC/?ots=1&slotNum=0&imprToken=b0bf7fd7-54e7-439d-7f6&tag=fhmeag-20
If all spark plugs are OK, the problem is from fuel system.
