Yes, Comberjohn, it is an MZ Trophy which still carries the Eastern German license plate and vehicle inspection stamp. It's a present from my bike-dad.
It's time to talk about the intake. The airbox is the first thing I dump when getting my hands on a bike. In this case it's such a big box that I rushed into it.
It was quite surprising to find inside a MAF the size of Cincinatti, so it was all going to require some serious modifications. When I removed the left part of the airbox (the one that connects to the throttle bodies) and tried to put it back, it was such a pain that I understood I could not live with that. Having everything accessible outside of the engine block is a must in every bike I build. So, I dumped it all and started from scratch.
Using two 2kg fire extinguishers and some silicon hoses I built a new intake that would connect the four 40mm throttle bodies with the 60mm MAF.
The word воздух (Russian for "AIR") was written using a stencil (I 3D print all my stencils, BTW, which is quite convenient). What I like about the Russian language is that you write the word AIR with a stencil in a piece of metal and you would think it actually says "Missile launcher" or something like that. Russian language looks quite mean with stencil fonts, which is very cool
The silicone hoses attract dust like it's their job, which is great in this bike. Black hose clamps completed the look I was looking for.
Note the quick release for the return fuel line. I tried in the fuel supply line, but it won't take the fuel pressure. Now it's just one clamp/hose to remove the tank.
The MAF looks very robust and seems like it could take a lot of pain without any further treatment, so simply sits outside with the plastic cover and cable connector facing back.
A bit more welding took place to make an adapter from the square MAF window (and four bolts) to a standard 60mm racing air filter. The air filter nicely pops up from the hole left between tank and radiator after removing the fairing. It sits behind the radiator side which means it breaths good while still hiding behind the radiator.
(there is no water leak, but some spilling as I topped up the radiator before taking this picture)
As you can see, after the intake with the MAF, filter, and even the battery, there is plenty of space to make it all very accessible, including the fuel regulator, which was deeply buried into the bike before.
I took a first ride today and it all works pretty well. It feels like some kind of a two week tank. I have some minor adjustments before my 1200km (test) trip next week.