The headlight is only AC when the "emergency" switch is engaged. Otherwise, DC as it should be. The lights were never intended to run AC-- which is why there would be a high failure rate when running in the "emergency" position. That feature was only supposed to get you home when...

I am particularly impressed by what appears to be a high mount air cleaner on the sport rack.

Following wiring diagrams isn't easy. I believe you have most of it right. All except for the headlight running off AC. It runs off of DC, usually after the main switch, which is fed power from the battery, which is itself fed by the magneto by way of the rectifier. There should be no load anywhere ...

Ed It is indeed worth a try. No reason to think that either the 100B or 125 Wombat systems won't put out 12V (since your 125 system does). Here is the data sheet for the 100B series coils: image.jpg Since they are rated to make 8V or better in the original system with a regulator and 6V battery in c...

Pretty sure LED lights in automotive/motorcycle configuration run on DC current although they may run on a broad voltage range. For that matter, LED made for 110v applications probably have rectifiers built in to convert to DC. I have inadvertently burned up LED diodes by reversing current so pretty...

93B did, 93 didn't. I don't even remember when I swapped out my 92B forks for 93, but I did. One short season and 30 years of pooping around in the yard, and they were toast. Back to the 92B style now and much more happy. I was just tossing that out there because until recently, I just didn't know t...

I would always go with the cost-prudent choice also. But even if shorted or open, it is the core that hides the technology we can't fake. Copper wire is easy to find. Lots of choices out there for magnet wire in a wide variety of gauges. Insulating wrap is easy to fake as well. But the material and ...

There isn't that much difference between parts as between the 100 and 125, depending on which model you are referring to. Both, I think, are 30mm. The entire fork assembly, wheel and all, should swap without changing the triple clamps, and I think all of them use the same head bearings and races. Ch...

I would agree, even without testing, that merely spacing the cylinder at the base would have no net positive effect. Far more is involved in changing power by altering port height than merely raising the port. By spacing the cylinder, all ports are raised both at their top and their bottom. Plus the...

Another ground option for grounding the engine is found in the newer CDI kits, which provide for a single black wire running from the ground connection on the ignition coil under the tank to a gripper clip on the cylinder head. This provides a short, low resistance ground return so that the ignition...

Charlie,

It's just not fair that you stumble into these deals. I could spend the rest of my life searching for such a find, and the finds find you. Ain't fair.

GMc

I already said that. As voltage rises, so does wattage. It isn't a matter of being conservative in engineering as being conservative in cash outlay. Starting with the then accepted need for trail lighting in terms of readily available DC lamps, a certain amount of output is needed to support both th...

PS: Danny, I could hardly believe it but . . . I connected to the green (battery charging circuit) wire of the Wombat lighting system and went simple AC power with a 12V aftermarket voltage regulator. With a 12V, 100 watt head light I could almost make Ponderosa Pine bark smoke at 30 paces with the...

Some of the red fiber type insulators at the ends of the wire coils are missing and any coil in this condition should be considered unusable. I am curious why you conclude that the absence of some of the original fiber insulator material makes the assembly unusable. The insulation is essentially st...

Depends entirely on the brand and built-in clearances of the engine you are referring to. Compression ratio is irrelevant in determining head clearance. It is simply a result of changing head clearance. Both my Hodaka engines will top out the piston within thousandths of an inch of metal to metal, e...

Most will work, but don't throw out the old one until you are sure it is beyond repair.

The cylinder base gasket is part of the deck height calculation. Removing it can lead to piston/head contact unless otherwise accounted for.

FWIW, lacquer thinner is acetone. Yamabond 4, Hondabond 4, same stuff. Aviation Form-A-Gasket in liquid form, very close. K&W Copper Coat, very close. They all work roughly the same, but Yamabond and Hondabond are made for sealing two stroke engine cases. The reason it is hard to remove is the r...

As between Squid and myself, we have the same problem, in mirror image. He has a Super Rat the number of which now falls on the 100B line, and I have a 100B of the same vintage with very close number which now falls on the Super Rat line. Not having access to source data, I can only identify the err...

From your forum monicker it appears you are from South Carolina. Market value is not constant across the country. My guess would be you have just identified fair market value for your bike by negotiating an agreeable price. Cleaning alone won't change the value, and restoring it to like original con...

I am the only owner for both my Hodaka and my RD. Figured once it was paid for, why sell it. I put the RD together from the crate while teching for Yamaha in 74-75. Still runs fine.

At idle, the HT3 is remarkably quiet, but it wakes up along the way. I would agree it is just a bit loud for street use. My Yamaha RD350B with DG pipes is not exactly quiet, however, and it is a street bike, two stroke twin from 1975. Still, I think the HT3 under acceleration is louder than the DG's...

You could look into the "dB Snorkel." Intended for two strokes to quiet the tone without losing power.

I would have to say that the data has been shifted one line. In the instant example, the "B" designation is correct as to the type of bike, Super Rat, but wrong as to the number sequence, that is, the number falls within a range one line up or down from the Super Rat B line of data. I ran ...

Moving the axle forward or back with relation to the steering angle changes trail, in this case the expression of a caster dimension, measured as the distance between the point of tire contact and the point where the extended line of the steering head contacts the ground. Any changes to this relatio...