All about the Whizzer h motor! Please post all info!

[Philliesfan30m]

I just wanted to start this thread to post all the info about the h motor such a dimensions and upgrades or anything that has to do with this specific motor because I couldn't find what I needed so hopefully this will help someone! I hope others post whatever they have as well. Thanks to anyone who helps!

 

[Philliesfan30m]

Ok here are some of my dimensions for the intake manifold. Intake port on manifold is .76" without the restrictor bushing. Restrictor bushing dimensions are .755" od by .575" id by 1.7" long. The mounting flange is 1.325" long by 1.25" at the center of the intake port and it tapers down to .575" at the mounting studs and the studs are .25" and the threads are 1/4 28 fine threads and the studs stick out .575" with the gasket on the mounting flange. Dimensions from outside of stud to outside of stud is 1.875" and inside to inside is 1.4" and center to center is 1.65". These numbers may vary but this is what I got on my motor. The ml5b carb dimensions are intake opening .697" and air filter/choke opening .875". Bolt holes .265" and outside bolt hole to outside bolt hole 1.89". Inside of bolt hole to inside of bolt hole 1.335". Center of bolt hole to center of bolt hole 1.6". Mounting flange 2.37" long by 1.1" wide at center of intake port and it tapers down to .575" at the mounting holes.

 

[Philliesfan30m]

Exhaust flange dimensions are .65" diameter exhaust port. Mounting flange is 1.95" long by 1.15" wide at center of port hole And it tapers to .575" where the bolt holes are. Inside of bolt hole to inside of bolt hole 1.275". Outside of bolt hole to outside of bolt hole 1.575". Center of bolt hole to center of bolt hole 1.425". The threaded bolt hole diameter is .15" don't know what the threads are but I will post it when I find out unless someone else posts it.

The oil drain plug is 1/8 27 npt. And it holds 6oz of oil and uses straight 30wt oil. If I'm wrong about the oil amount and weight please correct me.

 

[Philliesfan30m]

Clutch bracket dimensions on the clutch arm. .285" diameter for ball end of cable. .075" slot for wire to slide in to. .17" diameter where the ball seats in the arm. .285 diameter goes .72" deep then .17" diameter goes .3" the rest of the way through the arm and the overall length is 1.02".

 

[Philliesfan30m]

Flywheel is 6.5" od and the pulley on the flywheel is 2.5" od. Flywheel pulley to clutch pulley 5.125" od. Clutch pulley to sheave 3.625" od. All the pulleys are 5/16" if I'm wrong please correct me. And use ax belts ax26 and ax62 but that can vary depending on the bike. The clutch pulley has a Norma 9017 dd bearing and the dimensions are 1.575" od .668" id .545" wide it also has a bushing that goes on the id of the bearing and the dimensions of the bushing .666" od by .5" id by .545 long.

 

[Philliesfan30m]

Whizzer h motor tank inlet dimensions are 1.94" from slot to slot and .75" are the length of the slots and .25" deep for the tabs to lock into. The inside diameter of the tank opening is 1.5". The length of the tank is 14.5" not including the mounting brackets. The brackets stick out .375 or 3/8" on both ends making the overall length with the brackets 15.25". The height of the tank is 6" and the width is 6.5" and the nipple for the sediment bowl is 1/8" 27 npt sticking out of the bottom of the tank. The indentation in the tank that goes over the frame to mount the tank the dimensions are a little over 1" wide by 2 7/8" deep at the front and it tapers down to 1" at the back. The front being closest to the fill hole and the handlebars and the back is closest to the seat.

 

[Philliesfan30m]

Magneto cover part# wmh-2603 the bolts that hold it on are 1.5" overall length and 1.25" is threaded 1/4 20 threads. It has rubber spacers but I'm not sure they are needed but I used a nylon spacer .45" od .25" id .25" length. I'm guessing they are used to prevent from overtightened the cover and breaking the cover.

 

[Philliesfan30m]

Mine had a champion j10 plug in it when I got it. I saw that you can use a j6 j8 or j10 or any cross reference to those plugs and the gap should be set to 23-25.

 

[Philliesfan30m]

The bolt that holds the clutch pulley to the clutch arm is 1/2" 13 threads 1.5" of threads and 1.875" overall. The bolt that holds the flywheel on is 3/8" 24 left hand threads with 1" of threads and 1.25" overall length and has a thick washer and a locking washer.

 

[Chiptosser]

I knew the newer engines had a restrictor tube in the intake, I have not seen a restrictor in the originals!