1991 ZZR400 Starting problems
 

Just brought a zzr which was suppose to run It cranks And backfires so loud and sometimes it Starts firing but Wont start Any help im new here I would appreciate any Help thanks .

supposed to run, the checks in the mail, same thing lol
 

To start with, check your spark plug and replace it. Its not that expensive. If the bike was sitting a long time, plugs do go bad. Make sure the gas is not stagnant, if yes, drain the tank and carb and put in fresh gas. tell me a little more about the bike. Milage, condition, weather its been sitting or not. Take off the air cleaner and crank it over and see if it blows back through the carb, if it does, it could be timing or a bad valve. If who yo bought it from says its supposed to run, you should have heard it run before you bought it. If the guy says its supposed to run, then chances are it hasn't run for a long time otherwise he would know for sure. Check those things and get back to me.

Havent been able to check much at the moment and its just sitting but Previous owner got it running with alot of effort and by alot of effort i mean Cranking constantly and using the choke it started it ran and went around the block quite well then i took it home tryed firing it up and no luck but loud bangs it has cranked over but for a split second them back to cranking checked all the carbs all the bowls had fuel got spark plugs and checked to see if theyre was spark done all the basic soaked the carbs cleaned then 2 times and still nothing Completely clueless at this point Cheers for the pointers