P500 Won’t revv

[Yortm]

Hi all!
I’m having trouble with my sxs 500.
it had 220psi compression, so I pulled the top end off and found damaged buckets and cam lobes, removed front cover and replaced cam. Re assembled honed cylinder, new piston and rings. Cleaned head and valves etc.still has about 150psi comp. the engine starts and idles a little high but runs ok. When you accelerate it cuts out and then comes good again over and over. (Like when you hit speed limiter)
Replaced IACV. Serviced, tried ecu, fuel pump, throttle body, exhaust, injector even a stator. Spark is good. Fuel is good. Air filter is clean. Timing is spot on. And I can’t work it out?!! The throttle body is black on the inside? Not sure where to go from here. Any help would be great. Cheers

 

[Admin]

 

[Bastardchild]

Hi all!
I’m having trouble with my sxs 500.
it had 220psi compression, so I pulled the top end off and found damaged buckets and cam lobes, removed front cover and replaced cam. Re assembled honed cylinder, new piston and rings. Cleaned head and valves etc.still has about 150psi comp. the engine starts and idles a little high but runs ok. When you accelerate it cuts out and then comes good again over and over. (Like when you hit speed limiter)
Replaced IACV. Serviced, tried ecu, fuel pump, throttle body, exhaust, injector even a stator. Spark is good. Fuel is good. Air filter is clean. Timing is spot on. And I can’t work it out?!! The throttle body is black on the inside? Not sure where to go from here. Any help would be great. Cheers

Any codes flashing on the dash?

 

[Yortm]

Nope checked for codes and nothing at all. Everything seems to be working ok according to the computer

 

[hondabob]

If its only a problem with hard throttle try a new spark plug cap and spark plug. With hard throttle the firing voltage goes way up.

 

[Yortm]

We have tried a new complete coil and plug and still no success. 👎🏿