Throttle question

[Texastitan87]

While driving my venom x20 i have the throotle opened up all the way and around 46mph she backs off and starts to slow me down and i release the throttle a couple times and stops backing off and lets me take it up to 55mph. Anyone have an ideas how to fix it or whats wrong with it

[wlfpck]

What carb are you using? Original factory? If so... may want to run some carb cleaner or seafoam through.

[ben2go]

Lean main jet. When you let off the throttle the air-fuel mix is balancing out. At WAO there's more air than fuel flowing through the carb robbing the engine of power. I'm not sure what the jetting sizes are for those little engines. I would step up one or two main jet sizes. Again, I'm not familiar with those small carbs and jetting them.

[Texastitan87]

I have the original carb on it. The bike itself only has 126 miles on it so indisnt think i should be having this problem. I dont want to go up sizes in the main jet if u dont have too. Ill try some seafoam

[RedCrowRides]

It's difficult to diagnose a problem of that sort over the internet, but considering how new your bike is and how few miles it has, and if it is completely stock still- it sounds like it is maybe starving for fuel .It is not at all uncommon for the fuel lines on these China bikes to "flake" inside , or for their to be trash in the tank and/or petcock from the manufacturing processes. It sounds like when you give it gas its throwing or picking the trash up and partially blocking the fuel line or filter, then once you back off a time or two the trash drops into a place where it isn't blocking the flow so badly and you can speed on up. Also, make sure the fuel line isnt "kinked" , I've seen some pretty dodgy fuel line routing done on some of these bikes.



Fuel line is super cheap at AutoZone etc, I'd replace the fuel line AND the fuel filter ( it uses a 3/16" fuel filter and line) and maybe clean the petcock if possible .As a last resort I'd take the floatbowl off the carb and dump the gas out of it then blow it out in case some trash made it into the bowl and is partially blocking a jet.,etc.


In any case if you visit again and solve the issue, let us know what it was ,the more things we all learn to check when we have issues, the better off the entire community will be. Thanks!

[Texastitan87]

I contacted venom motorsports and they said its my evap system and to spray some wd40 into it. When i get home from work in 10 days ill reply back on here and let yall know what fixed it.

[RedCrowRides]

Look up Bizmoto on youTube, he has a video about Vaders explaining step by step how to remove all the emissions and evap mess. ,if you want to do that, it causes more troubles than it's worth imo and it doesn't help it run any better, but the opposite.

[Texastitan87]

So i took the air intake tube off and it works perfect now.