Yamaha HELP!!!

[kkahabka]

Ok here is the deal: 2006 Rhino 660, Blackrhino CDI, Looney Tuned Exhaust, K&N, Electric fuel pump, stock clutch. Ran great until now!!! I am having a terrible "popping" at mid-high rpm (about 5000-6000rpm). SO I adjusted the valves, cleaned the carb. and replaced a couple o-rings, replaced the fuel pump and filter, and the clutch seems to be operating properly. It is still popping! So I checked the boot from the back of the carb. to the intake, it looks fine, however I started it without the aircleaner and when the popping starts, it sprays FUEL out the FRONT of the carb.? Is this causing the popping? What the HECK?!?!?!

 

[facteryfmf]

Stock carb?

 

[kkahabka]

YES stock carb.

 

[RZRS EDGE RACING]

Whats the press set at on your fuel pump, have you tested the cdi box with another box

 

[kkahabka]

The fuel pump is a1.5-4Psi pump, the Black Rhino CDI was swapped out for the stock one (no change in running condition).

 

[RZRS EDGE BILL]

sounds like to much shims under buckets (Valves) or timing issue? just my .02, best of luck to you. maybe shered woodruff key at stator if have one. would effect crank sensor. seen that happen on a quad, same symptons though?

 

[kkahabka]

sounds like to much shims under buckets (Valves) or timing issue? just my .02, best of luck to you. maybe shered woodruff key at stator if have one. would effect crank sensor. seen that happen on a quad, same symptons though?

Would my symptoms just appear out of no where if this were the issue?

 

[RZRS EDGE BILL]

well, I feel maybe not so much the valve adjustment, however broken valve spring, slipped timing chain, or sheared woodruff key, could happen out of nowhere, could it be your exhaust is clogged, bad paking etc? symptons fit that too. something is creating back pressure to to blow fuel out the wrong way.