Hello,I am at wits end ,We can not figure out the problem…hitachi carbs just rebuilt..Bike will still stumble and run on 1 cylinder,also gas getting into the front pipe and shoots out when started.The bike has new Jardine rumblers and carbs have been rejetted.Sometimes will run on 2 cylinders but then go back to 1,could this be electrical or carborated….Please I welcome all responses..Thanks in advance!!!
I assume your valve clearances are in check? Is your timing off?
What kind of compression are you getting on both cylinders?