popping and backfiring ?

[dean_jimmy96]

what would cause popping and backfiring at 4000-5000rpm?, i was thinking it was the carbs but i took them apart cleaned them and it still does the same thing, anything above six grand it runs great and idles great too
the sled is a 98 700 vmax triple
thanks!

 

[Grinny]

check your jets

 

[dean_jimmy96]

one cyinder, zero compression
top end rebulid wohooooo