Let's verify some things. Question, when you installed the new piston, did you measure the skirt clearance between piston and bore with a feeler gauge prior to final installation, and if so, what was the measured clearance? When you installed the new ring/rings did you measure the ring end gap for e...

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Ed, I don't remember specifically, either, what the 20mm looks like. Just going from the schematics, the 20mm had two holes, no slots, but it did have the throttle adjustment on the top of the slide instead of through the Venturi body. I have always assumed there is a bit of a flare, but would not h...

Why Hodaka specified non-detergent oil back in the 60's and 70's may have more to do with what was in detergent oil at the time than a specific need for an oil that had none. Or, it might have had to do with a tendency for detergent oils of the day to infiltrate and expand the clutch disc material u...

That does look like a 20mm due to the throttle adjuster on top of the slide. Might measure again. The slot could have been someone's idea of making it easier to remove from the bike. Look at the slot. Does it look like a factory job? If it does it might just be good workmanship but I don't think the...

You are correct that the CW used a 28. My error. Conversion to reeds would require a reed block that mates to the cylinder stud pattern, and accepts a two stud carb with the right bolt spacing, or a spigot and spigot mount carb such as used on the 98. It's been done. My point is still that the diffe...

From Shell Oil website regarding Rotella: "PROTECTION AGAINST DEPOSITS The performance benefits of the unique combination of dispersants and detergents, boosted by the use of the dualfunction additive component, are seen in enhanced engine cleanliness and viscosity control compared to previous ...

If it won't start on gas it won't start on ether. There is something going on here, even if it is just grossly flooded. Your description of the timing sounds right and .014 is close enough to run. By the way, when doing your compression test, empty the carb first and turn off the gas. No need to dra...

What Max said. One kick isn't enough, and throttle must be open. Kick vigorously until the number stops rising. It could take five or six but you will see what we mean. I don't use Wd40 but do sometimes use motor oil. But only if I think the rings are not good. Anyway, oil is optional, multiple kick...

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If Kelly has done a YouTube, I would follow that, but anyone else....? If you don't have a magneto puller for the Hodaka, don't try to take it off. Just check the points through the witness hole. Timing mark is on the flywheel and one on the engine case. Line them up and take a peek. The points shou...

I can't find a Hodaka that used a 22mm. It appears that some of the Honda industrial engines did. It could have come from anywhere, but that makes it suspect for use unless you are good at jetting. Are you sure it is 22mm? I don't have an original 20mm Mikuni to measure, but I doubt it measure much ...

Mine measures 24.40mm and has two slots.
I have no idea what might have used a 22mm carb but the one slot sounds like someone's solution to a carb that didn't fit because the holes were too close together. Someone else might have an idea here.

Measure the Venturi at the back to the nearest mm. I checked the parts list for the Ace 100 series and it appears they all used the same 20mm non-slotted carb. Yours could be from a Rat, or someone could have slotted the flange, which would likely show as a home brew thing just by looking.

Now the plug is dry...could be it was wet before from being kicked and pushed without result. Normally, it takes effort to get a plug wet when kick starting. Eventually but not right away or we would all have flooding problems. Still, you have touched a lot of things here, and may still have not loo...

There is no reason to mount the original 20mm carb unless you are just trying to get it running. It will work, but the Ace 100 carb is tiny by most any measure. I did a reed conversion way back in my be 1972, and went to the Super Rat carb at 24mm. Much better. I even used that same reed/carb assemb...

Make sure the petcock isn't clogged.

I aquired a 1968 (i think) hodaka ace 100 frame and parts about a year ago. everything but the engine. I just bought an ace 100 mx B engine on ebay. from what I can find while researching, the mx motors are from super rats which they built in 69. am I correct? I believe the super rat engines are th...

I think I went through three plugs last spring before a new rebuild would run without fouling. There is just a whole bunch of (non-2-stroke) oil in the crank that needs to be washed out before it settles down. This is as it should be. Plugs are cheap compared to the top end. Running with the pipe of...

Modern or vintage, they all need just three things to run: fuel, spark, compression. Fuel has to be in the right proportion, but most any engine is tolerant of a wide range of fuel provision. You verified it has fuel. Is the fuel fresh? You verified that the plug sparks outside the engine. Doesn't m...

Bill,

Funny thing is I used the same paint combo as you on my '68 Kaiser CJ-5 to reproduce an army drab green. Same products. Worked fine. Why I could not get those products to stick to a Hodaka frame I do not know.

I did much the same process last year and this spring on my old Ace 100B, although when I painted it, I painted it to Super Combat scheme because I was upgrading to that motor and chassis dimension. Anyway, I had a heck of a time getting paint to stick to the bare frame parts. Rattle can paint is ju...

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Max, To me the first is right side up, the second upside down. I have that problem all the time because of using an iPad. Don't know why. Vic, The differences between an 03 Wombat and the 95 Combat Wombat are these: The 03 is reed induction, the CW isn't. Port specs on each are about identical excep...

Over the years I have seen any number of points sets that looked remarkably like Hodaka points, but usually, when compared side to side, they were different in some way. If you have a set of Hodaka points, take them along for comparison. Unless they are identical, they probably won't work. Don't rel...