Predator starved of gas?

[The Muffinator]

Recently mounted a Predator 212cc engine on my Quasi-Stellar frame. Has plenty of torque and is perfect for the bike but at full throttle, the engine seems like it is starved of gas. I am pretty sure it is not the oil level sensor because that would just cut the engine out completely, no?

I did not find any main jet adjustments on the carburetor. Are there any?

 

[shambrick]

Sounds like you're bumping up against the governor.

 

[The Muffinator]

Sounds like you're bumping up against the governor.

I plan to leave the engine mostly stock for now. Would it be worth it to remove the governor?

 

[shambrick]

I plan to leave the engine mostly stock for now. Would it be worth it to remove the governor?

There are several other lower cost options that you can take before you go that route --> Open element air filter, rejeting the carb, and less restrictive exhaust. Look up some of the treads in this forum.

http://www.oldminibikes.com/forum/honda-clone-predator-engines/42480-diy-re-jetting-6-5-a.html

http://www.oldminibikes.com/forum/honda-clone-predator-engines/69457-give-me-ideas-my-predator.html

 

[The Muffinator]

I may just buy a whole new carburetor to modify. I really wanted to try to keep the engine stock.

 

[The Muffinator]

Anyone else have any other remedies for this problem before I start modifying my carburetor?

 

[FirePowerMinis]

Swapping a jet, really isn't "modifying". It's more "uncorking". It's dead-lean stock, and will run better with that one minor mod. WAY easier than de-G-ing, and WAAAY safer. It may be so lean at the governed RPM that it surges.

 

[The Muffinator]

Sounds like you're bumping up against the governor.

Swapping a jet, really isn't "modifying". It's more "uncorking". It's dead-lean stock, and will run better with that one minor mod. WAY easier than de-G-ing, and WAAAY safer. It may be so lean at the governed RPM that it surges.

What size jets should I go with? This'll be the first time I physically modify a carburetor to get more performance.

 

[texasfabguy]

What size jets should I go with? This'll be the first time I physically modify a carburetor to get more performance.

only real way to know is by taking a plug reading. post a picture of you plug.


BTW are you still running the stock plug? if you change it out and try it.

 

[The Muffinator]

only real way to know is by taking a plug reading. post a picture of you plug.


BTW are you still running the stock plug? if you change it out and try it.

Yes, I am still using the stock plug. Everything is stock. What would you recommend?

 

[texasfabguy]

NGK or any good replacement. Torch...just say no!

 

[FirePowerMinis]

Try an 80. It may not be ideal, but a lot better than the 70 it likely has.