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I removed mine off of a 3 HP Briggs and Stratton with no problem. The motor is on a Bird Drover mini bike. pete108

All I'm going to say is if you decide to disconnect the governor, remove the small gear inside. They could break and come apart at high speed and that would damage the motor.

Nice looking motor. You did a great job on it.

If I understand correctly you are trying to run a 72 on the motor, 13 on the jack shaft, 13 on the jack shaft and 72 on the wheel. That's a 1:1 ratio. That will never work. You need about a 6 to 7:1 ratio.

Do what 2or3Wheels said. Change the sprocket on the motor to the same size sprocket on the jackshaft.

kibble, storm door.

The only way for your piston to hit the valve was for your timing to be incorrect. Or the motor was rev'd to a point where the valves would float. Which would be corrected by changing the valve springs for stronger ones.

Kibble, That's correct.

A jack shaft is normally used to gear the motor down to get more torque.

If you are going to use a torque converter, you while not need a jackshaft.

The octane rating is a measure of the autoignition resistance of gasoline (petrol) and other fuels used in spark-ignition internal combustion engines. You can use a higher octane fuel in a low compression ratio motor but not the other way round. If you do the motor would knock.

Welding helmet, gloves and argon gas.

I rap a tie-down strap around the flywheel in the opposite direction of the nut you are trying to remove and securely fasten both end of the strap to your work bench. As you put force on the nut the strap tightens around the flywheel. pete

yes. just make sure you pack the pipe full of sand to prevent it from collapsing

take the cover the flywheel and check it out. the ones i've seen have a band that rubs against the flywheel to stop the motor when you release the safety hand/level. pete

athif, i scronge parts around anywhere i can, but most of the time i buy from princess auto. use the band brake from an old 3.5 hp lawn motor. the one's that shut-off when you release the safety hand. pete

brake caliper hi athif i'm also from canada, actually in ottawa. where are you located? princess auto also sells a disk brake caliper it can be found on page 91 under drive components. you don't have to buy the disk that goes with it, you could mount the caliper on the sprocket. pete