Looking at the friction discs, it is not clear that the holes overlap the swept area. If not, this would have no effect on friction surface.

The ground wire, by definition, is grounded. Connect one lead to the black ignition lead, one to the blue ignition lead, both in the harness coming out of the side case going up to the coil.

Problem is that while several of the later bikes used a 22T fourth gear, they were all gear module 2.0, and should be dimensionally the same. The model 92 Dirt Squirt used a 22T fourth, but the specifications are not posted on the website, so I doubt know what module was used for the gears. Thinner ...

I like star gear thingy. Much more descriptive. If military inventory, it would be thingy, star gear, one each.

hodakamax wrote: This was my very first use of epoxy which had just been invented.(that's how long ago it was!). Maxie

Wow. You were racing a model 92 in 1938??? That was a long time ago.

I have successfully soaked stuck pistons loose but it takes time. I use diff lube like 75W90 or whatever. Seems to penetrate anything just does so slowly. I unstuck a 1945 evinrude 5hp outboard that had been locked up for years. Worked so well I never had to take it apart. Still running 30 years lat...

Halloween is coming up. Eggs used to be popular in Detroit about that time of the year. Never did catch the chicken that was tossing all the eggs at the school.

Personally, since this is a put together bike, from so many different sources, I would concentrate on the engine and how well it works. If it runs nicely, looks good to you, and isn't a rust bucket, it is your choice. It may not look like any one particular machine, but if you like it, that's what c...

Assuming you want to use a knobby tire such as a Rat would have used, any brand still available in 3.50x18 rear, 3.00x21 front. I believe they came with Nitto, but don't believe Nittos are available anymore. Metric sizes are all much wider, and taller, than stock.

Or diesel fuel.

Actually, if you run the rear axle as far forward as it will go, you can probably just lift the chain off either sprocket. Just another way to...wait for it...skin a cat.

What she is saying is there is more than one way to skin a cat.....

Is there a reason why no one simply designs an expansion system for their trials bikes? The math isn't all that hard. Cutting and pasting shows that the engines are fairly tolerant of design differences, but rather than guess at the result, just make one that works for your displacement and power ba...

My guess is he is out of the closet now...

As nearly as I can tell from the schematics, you can turn that clutch into a 9 disc clutch (5+4) by swapping out the cage. Strictly Hodaka has them for just under $100 US, or perhaps someone has a god one to spare. I think you would be ahead by working with the larger clutch to start with rather tha...

Dale is correct. I said left mark, I meant right mark. Right hand mark is the point break. The premixed fuel could be fine. 40:1 is a bit light for air cooled motorcycles IMHO. Without knowing what kind of oil is mixed with the fuel, it's hard to say if it's worth using. I have seen premixed fuel at...

With an open exhaust tube, it will run fine, sound like a big chain saw, and pull about as well as one -- not very but that's not your problem here. Your flywheel should have a mark on it in the form of a scribed line, and may have "F T" as well. On the engine case there are two marks mayb...

Is slippage a function of spring pressure? Yes. However, spring pressure is comprised of the condition and length of the springs, AND by the build height of the clutch pack. Consider what would happen if you just took out one friction disc. It will work. It will feel lighter than before. And it will...

The fact that it is making spark means it isn't the key or the harness or the coil or the condenser or whatever. Verify spark with a known good plug, not a steel rod or screw driver. Now that you know you have a spark, you need to know if your plug makes spark, and when it sparks. Everything else ma...

Assuming that you tried the spark plugs outside the engine and laying against the head to verify that you had spark, the only item mentioned that is only half done is the ignition timing. Setting the gap on the points doesn't set the timing, it only approximates it. It should be close enough to run,...

Multiple springs are used to achieve a target rating while still having enough free length in the spring. Commonly, a single heavier spring will achieve its rating by using thicker wire, which limits free length. It's possible, but problematic. Even modern hot rodders will use multiple springs on a ...

Next issue now after reassembly the clutch is always engaged. I am assuming you rebuilt the clutch, assembled everything in the side case, connected the cable, and nothing happens. No clutch. Correct? While the screws need to be tight, not tightening them enough won't stop it from working, so somet...

Mine is similar, except for the case induction. 32 Mikini three vanes front and back, UFO, 15x66 for track work, 16x66 for trails and open country with top end around 62 mph by GPS. On the track I was pulling corners in third gear, and it sounded like yours was right there. Difference, I use a womba...

1. I would like to see this engineering concept adapted to a 175 Hodaka with primary kick start. 2. You show a lot of initiative to have even dared to do this because failure would not be reversible and engine cases are getting harder to find. 3. If you get the clutch thing sorted, load some photos....

Most times I raced, I raced against myself. 50 mile cross country races were rarely head to head. It was about keeping pace and focus, and doing better today than I did yesterday. On the other hand, at the scrambles/moto in Athena this year I had the opportunity to plan a pass two laps ahead of the ...