Can you remove the governor for HF 2.5Hp engine.

[rgvkid]

Is it possible to remove the governor on a 2.5HP engine from Harbor Freight? If so are there any tutorials links on the net?

 

[Kenny_McCormic]

Pretty close to a 6.5 just smaller.

 

[ZnsaneRyder]

The throttle linkage assembly is a bit different than the 6.5. It's a newer engine, and not many have used this engine.

It's easy just to run a cable straight to the carburetor by looping and mounting it around the back of the engine so when the cable tensions, it opens the throttle.

I got that idea from KY Biker when I met him in St Petersburg.

I used his idea on the 2.5HP on my bro's new bike trailer, and it works GREAT!

 

[gokartcrazy]

now what happend when you remove the governor

 

[ZnsaneRyder]

now what happend when you remove the governor

It revs over 4000RPM or more and goes faster. Simply disconnecting the governor arm and going right to the carburetor removes the governor.

I guess you could open the crankcase and remove it internally, but it's less hassle just to use the carburetor directly and not open up the engine.

 

[Russell ATV]

Bypassing the governor works quite well. The key is to keep the return spring linked to both the govenor arm and throttle assembly. This will keep the internal part of the arm from making contact with the piston rod.

AGK has a good play by play on bypassing the governer by connecting the manual trottle arm directly to the trottle butterfly: http://www.affordablegokarts.com/throttle-linkage.php

 

[rgvkid]

Hey Znsane, do you have any pics of KY's mount to the swingarm? He's using the setup with a multi gear setup swing arm. How is your bros setup on the uphill climb with the 2.5?

 

[ZnsaneRyder]

I don't have any more pics of KY's setup, I wish I did.

I'm going to get some pics of my Bro's 2.5 trailer for you when I can.

The 2.5HP will get you up hills just fine, if you are already moving. It's not a really torquey engine like the 6.5, but it pulls just fine enough to haul a toolbox, small cooler, and can of gasoline along with the rider. You have to pedal from the start just to get going, but it has enough power.

So far, on flat ground, it will do 38mph top speed, and 42mph on a slight downhill, and uphill it will hold about 28-30mph, so it's not bad, especially with the tall gear ratio we are using. I'm really liking the little engine, and it's very quiet! So far, a few tests have averaged over 130MPG. It's still on the very 1st oil, so we'll see if it gets even better after an oil change.

 

[rgvkid]

Great, Sounds like a decent engine with a lil less worry about legalities. Im sure you can get away with talking your way out of the questions because it is conciderably smaller then the 6.5, plus great MPG. Sounds like a winner to me especially if you do a Motormaker side setup. Less weight for it to push.

Thanks Bro.

 

[ed1380]

49.4cc so it should be legal everywhere. just need a helmet

 

[Russell ATV]

The throttle linkage assembly is a bit different than the 6.5. It's a newer engine, and not many have used this engine.

It's easy just to run a cable straight to the carburetor by looping and mounting it around the back of the engine so when the cable tensions, it opens the throttle.

I got that idea from KY Biker when I met him in St Petersburg.

I used his idea on the 2.5HP on my bro's new bike trailer, and it works GREAT!

Looking at your picture, it would appear you have the centrifugal clutch connected to a friction wheel driving the rear tire. If this is the case, do you find you are eating many tires.

I have a small tecumseh 2 stroke that I have connected to a bike, but even with a giant sprocket, I cannot get the necessary reduction to make the bike off road capable. I have thought about friction drive, but am afraid it will eat too many tires.

Russ Barrow
Russell ATV

 

[ZnsaneRyder]

Looking at your picture, it would appear you have the centrifugal clutch connected to a friction wheel driving the rear tire. If this is the case, do you find you are eating many tires.

I have a small tecumseh 2 stroke that I have connected to a bike, but even with a giant sprocket, I cannot get the necessary reduction to make the bike off road capable. I have thought about friction drive, but am afraid it will eat too many tires.

Russ Barrow
Russell ATV

That's not my bike, that's "KY Rider's" bike. It's a centrifugal clutch and sprocket setup driving the little 10 inch wheel. It's hard to see the little wheel due to the angle of the picture. I saw it in person, and it rides very well. It's not for off-road use, but it flies on the road, and handles turns very well.

I posted his picture because he uses the 2.5, and I wanted to show the throttle setup.

Here's another side pusher just like it using a 3.5 Briggs made by "Motormaker" The 2.5HP one was based from this one with the briggs. I really like these and may consider making one myself.