I have been working on a Predator 301 build that I am putting on a minibike of mine. I have jetted the carb, added Go Power Sports air filter and header on it, and mated it up to a Go Power Sports 40 series CVT. This CVT is rated for way passed the stock 8 horse power of the 301cc engine. Yet the CVT instantly engaest after I start the engine. The engine also seems to be idleing way too high. So my question is, does anyone have any suggestions on fixing the high idle. I have backed of the idle screw on the carb all the way. I have even put the original jet back into the carb to see if that was the problem, but it still is idling too high. Dont know what else to do. Is my carb defective? Is there any other suggestions?
Predator 301 idle issues
- Thread starter cjsexton
- Start date
Sounds like you have a vacuum leak. Spray starter fluid all around the area between the carb and engine. If it revs up, you found it.
Also, check on throttle butterfly in the carb. Make sure it's moving freely and not caught on anything.
Rat
Well-known member
Did you delete the governor?
The governor is responsible for closing the throttle butterfly and WOT is its default position...
You want the default position to be closed and to be in control of the throttle
The governor is responsible for closing the throttle butterfly and WOT is its default position...
You want the default position to be closed and to be in control of the throttle
no the governeor is still in tact
Rat
Well-known member
Well that's why it's trying to take off on start up then.
I prefer to delete governors and use motorcycle type carbs... so if that's not your thing, Deny or Pancho will be of more help to you
Denny
Canned Monster
Wot is only the default position at idle for the governor. It aids in restarting the engine cold or hot. It only closes the throttle blade with the engine running, to stop it from over reving.
Atleast that’s the way it is supposed to work.
Atleast that’s the way it is supposed to work.
Denny
Canned Monster
Have you loosened up the 10 mm nut on the throttle pivot? Is the cable hooked up correctly? In this case a picture is worth a thousand words.
Karttekk
Well-known member
Adjust the governor to factory default settings. The common way to do this is to loosen the 10mm clamping nut on the governor arm that is fastened to the governor shaft coming out of the block. Once the arm is loose on the shaft, push the throttle butterfly to WOT then hold it or secure it in that position. Grab the top of the governor shaft with pliers and turn it clockwise until it stops. Some engines need the shaft turned counterclockwise but I don't believe this engine is one of them. Hold the shaft tight against its stop then tighten the 10mm clamping nut to keep the arm from rotating on the shaft. This is the default procedure of most small clone engines. The governor controls idle speed on those engines.
Karttekk
Well-known member
Also make sure any throttle/governor springs you may have removed or unhooked are back where they were.