Technical Gut less rotax evo max

[Oran41]

Hi guys got a rotax evo max with no bottom end pull it flies once it s up there but getting left out of slow corners buy every thing ..tried jetting down jetting up sprocket rear two sizes bigger than anyone else front the same size at a loss to figure it out help and suggestion welcome

 

[Team13Karting]

That could be any number of things:-

What oil/fuel mixture are you using?
What version EVO kit are you using?
How many hours are on the engine?
Is the carburettor clean?
Do you have an air leak somewhere in the fuel pipe or elsewhere?
Is your kart setup too stiff, so that it's killing the engine on exit? Once you get too low on revs, it will take a little while for it to pick up.
Is it bogging on exit, or are there pops and bangs?

What would really help, if possible, is some video footage. That would give people a little steer on what might be causing it?

 

[Adam]

Did you manage to figure it out?

 

[Oran41]

Still gut less been through everything just waiting on another exhaust to try if that don't fix it .its going in the bin lol

 

[Adam]

Still gut less been through everything just waiting on another exhaust to try if that don't fix it .its going in the bin lol

Could be worth taking to and engine builder and get them to dyno it.

 

[Oran41]

Made great power on the Dino its something in.my set up that's robbing the guts

 

[Adam]

Made great power on the Dino its something in.my set up that's robbing the guts

Was it ran on the dyno with all your ancillaries, like loom, coil, battery etc? Could be something there at fault.

 

[Oran41]

Just the engine that was run on dyno last things to change is the exhaust and loom

 

[Oran41]

Finally sorted the running problems power valve was sticking open would look OK when parked but after using a go pro it was very slow to return stripped and cleaned valve. fitted a new electronic control valve and wow its a different engine all together