You can always rewind the primary coil. Don't know if it would end up costing less than a NOS or used coil, but it might serve curiosity to see if there is a hidden fault in the wiring. For example, there could be a bare spot on the windings that doesn't show on a low ohm test, but might show on a m...

The forum was turned over to the Hodaka Club earlier this year. My understanding is that Paul no longer owns the forum.

Looks like a Wiseco forged piston. No idea what "50" represents. Intended for a 50mm bore is my best guess but have never seen one marked that way. Perhaps someone who has seen old school Wiseco pistons will know.

Actually, it sounds like dirty points. I suppose it could be an intermittent open circuit, like a broken wire. Wouldn't be the first time a plastic coated wire was broken down inside where you can't see it. Sometimes called a wiggle fault.

Why limit yourself to 102.6 mph? If a 50cc Honda can do 97, and a 100cc Daytona effort reached near 110, seems to me yours can do at least 103.

In the same general vein; has anyone found or worked up a cross-over chart for 'Brand X' pistons or rings with Hodaka. It seems someone used Yamaha with modified wristpin or something. Any knowledge on this topic would be enlightening, and, heck, maybe even useful... If anyone has ever done somethi...

Posting pictures is a function of posting a message. When you type a message, at the bottom of the white message box are two buttons, one of which you already use (Submit). The other button is "Full Editor & Preview." Hit that button instead of submit. That lets you literally see what ...

I don't think I have ever seen a piston marked with its actual size in millimeters or inches. Usually a stock piston has no markings at all, or might be marked +1 or +3 or whatever, depending on the batch tolerance range. Oversize marks are usually just the amount oversized, frequently in thousandth...

Assuming there is such a thing as a 0.050" oversized piston for the Ace 90, it would still be smaller than a stock Ace 100 piston, but not by much. Bore size is slightly more than piston size, of course, but bore size is easier to find listed. Ace 90 bore is 48mm, or 1.89". Add +50 (0.050&...

efkruger wrote:Thanks Jack, Do you use weights on the spokes or do you use another method for balancing them?

Tape weights.

Depends on how fast your dirt bike can go. Anything over 40 or 45 and your wheels can hop, even on a dirt bike. Since mine will do 62 geared for moto, the wheels are balanced.

The 125 big bore kit worked just fine, even if it wasn't as radical as it could have been. Porting was mild, bottom and mid range power far better than the Ace 100, worked great with reeds and a 24mm Mikuni. It wasn't a rocket ship and so wasn't suitable for motocross, but for cross country it was a...

Compression due to chamber volume, squish band profile.

For sale is a Hodaka head with the numbers stamp 92501 made in Japan........ Im guessing its a typo. :ugeek: Victor Lots of Hodaka heads were cast with the part number including one blank spot in the second position, as in 9_2501. Probably what this guy is seeing, so not necessarily a typo, but it ...

Looks like someone tried to MIG weld the head. I wouldn't do that. TIG would be far better, and yes it does take talent to do this one right. While you are at it, it could be built up some, and remachined into a toroidal chamber. As long as you are going to spend the money.....

Clicking on the photos doesn't improve the photo clarity. Both images are slightly out of focus because the depth of field is so shallow that only limited portions are actually in focus. But it looks to me like it was previously welded, and then either tapped or heli-coiled. What may appear to be cr...

Well, you knew it didn't run, and apparently he had the same problems everyone else has. IMG_0742.JPG This looks like your typical piston failure following some heavy detonation. No doubt the ring fragments also made their way into the bottom end and took out the bearings. But I can't make out what ...

The 250's have more in common with the model 03 than the earlier Wombats or Ace series. Transmission is similar in that it is a constant mesh, but it is primary kick start so has those few extra parts inside. It is also oil injection, and so has the pump parts as does the model 03. The combustion ch...

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Spark knock is a non-technical catch all for either detonation or pre-ignition. I suppose one would need to determine which is actually going on to know how to fix the problem. Detonation can be as simple as backing off the timing to go with the gas you can get, or buying better fuel with a higher o...

I never tried using a vacuum bagger to grease bearings. I suppose it might be interesting, if messy, but isn't necessary if you are practiced in hand packing bearings. The point of sealed bearings not having adequate grease is exactly right. I would never install a sealed wheel bearing in a Hodaka w...

Room temperature vulcanizing. It is not a solvent based adhesive like Honda Bond 4. And no, it doesn't lift the paint on the back side of the badge. My badges have been stuck to a Clarke tank for three years now and I don't think I could get them off without cracking the badge.

X2 on using Right Stuff. It is a silicone product, but is gasoline and oil stabile and used for gaskets and such. It also repairs sneakers, and makes metal dog bowls non-slip when applied to the bottom. It is incredibly strong compared to regular silicone. Get some. Try it. Use it for whatever you h...

If you took your measurements with the broken piston shown, you really don't know yet whether a rebore is needed, or just a clean up of the cylinder walls. For example, you measured a 0.006" clearance in places up and down the bore, but if you used a piston that itself is worn by 0.005", w...

I don't know the grade of this aluminum plate.........All holes in the two prototype pieces have at least 5/8" of material surrounding them. Maxie Max, There is a formula for determining the amount of force needed to bend aluminum stock. Two of the variables in that formula are the tensile str...