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Hi folks. Have not been here for a while, but still riding my 83 XS400 Seca, with a Maxim engine. Was reading a post by someone who had both engines apart and commented they are quite similar, but the cranks differed a bit. And of course the number of gears. When I check the claimed horsepower...

Hi guys. I have an 83 XS400 Seca DOHC. 6 speed motor was tired. Installed a 5 speed Maxim motor that is now running sweet. My question. Can you direct me to the gear box ratios. I am mainly concerned with the top gear ratios in each engine. That will help me with my final drive selection...

Story so far. Bought an 83 XS400 with a well worn 6 speed DOHC motor. So bought another motor, 5 speed and put it in. Installed new front and rear wheel bearings, Installed new swing arm bearings and shaft. Removed the forward third of the air box. And painted the main parts an ugly purple, that...

XS400 monoshock with roller bearings in the swing arm. The bearings are available, the matching shaft / bushing is not. The old shafts gets rusted and pitted. Could the old shaft be turned down, and a bronze bushing be machined to go between the shaft and two new roller bearings? Unkle Crusty

Hi folks. I just joined. Real name is Michael Casling, from Gabriola BC. Generally called Unkle Crusty, or Crusty Snippets if I write something. I have an 83 XS400 Seca. It was a bit trashed but I changed the engine and a few other things. Currently have the swing arm out. Have the bearings...