Jawa Chopper #2

After I rode on my rebuilt Jawa through a summer, slowly the autumn come, and then winter followed, so again we couldn’t ride on our metal horses in the cold. So it was time to take a look at what should be improved, or transformed.

Of course, at the beginning I wouldn’t thought that I’m going to transform the machine like this, but this is just me: I can’t stop myself not to build over everything, if I’ve already started. The problem is that I always strive for perfection, maybe sometimes too much, and I’m not willing to compromise. So again I disassembled the machine into pieces and sorted what I want to change. Now not so much the look, (although I was not completely satisfied with), but usability was the main aspect.
Stripped down the machine, but now not entirely, because the front was fine and the engine block have been renewed last year, so I didn’t have to worry about that too much.

I was not comfortable with the back yet, so I took it out and started to draw up a completely new rear swingarm. With the original pieces, I welded a 20 cm longer rear swingarm. This sounds a bit too much and it is! To do this, I already had to build over the projection of the frame on the back, because of the longer swingarm, the rear shocks needed a new attachment point. So the projection of the frame on the back was cut off from its place and welded backwards 5 cm lower. I reinforced the original tubing with some flat steel strips and welded in the new connection point. After all it was pretty easy and straight forward. This reconstruction has greatly changed the bike, now I didn’t sit over the rear wheel, but before it. This had a very positive effect on the bike’s handling. It got much more stable and easier to control because the weight distribution was way better.

So I changed the back, but of course, the seat had to be changed. Considering that the last one was very uncomfortable. The motorbike is meant to be really stylish, so I wanted to make a classic swing saddle, with suspension and all that. Of course, not made of leather and iron, I came up with something more modern: I carved it from rigid polyurethane foam and I covered it with fiberglass. Since the seat was shaped to match my bottom, it was not only comfortable, but because of the composite materials, lightweight and strong! To make it more comfortable, and also because of the look, I installed a nice spring under it. So the seat became really cool, perhaps too comfortable for a chopper!

I switched my tank too. This is specifically because of the usability, because although the unique handmade tank looked very well, it was too small (I didn’t even wanted to do it big) and only 10 ~ 12 liters of gasoline just fit into it. What is not too large in compared to the Jawa’s 5 liters consumption. Luckily, from my friend, Feri, who has a 69′s machine, I got a contemporary tank with an indenture. Anyway, this looks freakin nice, beautiful teardrop tank and even the Jawa logo is included on the side! Just the little dent had to be repaired and it was ready, moreover it even roughly fit on my frame!

I made a new place for the electronics: as the rear suspension was prolonged, the wheel got much further back than it originally was. This created a big, blankly gaping hole between the block and the wheel. Of course I needed to put the accumulator and electronics here, but in what? I had a dry powder extinguisher (it would be long to tell the story, let’s just say that eternal gratitude to the Budapest Technical University’s Kármán dormitory), and as I saw it in the corner of the room, I knew instantly that I have the ideal piece. Of course it was too tall, so I had to cut it, and solve it somehow to be opened easily. This is probably my favorite piece of the bike, very nice! And of course, the battery exactly fits in it!

After these, there were only small things left to do. I fitted the rear fender to the swing-arm and at the end of this, was placed the number plate, so it moves with the wheel, causing the bike look much more simple. I slightly changed the exhaust pipe as well: I took out the flute and put a resonance cone into it. It made the motorbike much louder, but what is the matter:  the bike has gone better because of it, so it was worth bothering with.

Of course, everything got the standard Matt Black primer painting, just because I like it. I simply do not like the flaming! And I could already ride with it … again!

In this way, with its secondly rebuilt form, I successfully rode a season, and perhaps I was even more delighted than the first time. Now everything worked perfectly and never let me down any more. All conversion worked and it became a very good and reliable motorcycle. There is nothing left on it, which the bike does not necessarily have have to go with, so the machine had a very airy, empty look. Oh, and of course, because of the old-fashioned look, everyone looked at it and often astonished when for the question “How old is the bike?” I answered that it’s barely 18! I feel a bit sorry also, that I can no longer use it … but who knows what the future brings!