Converting your throttle tube to a 1/4 turn. I'm pleased to say the GS550/673 is going really well — the engine has been faultless so ...

First, a bit of history... hey, life isn't all just fun you know! When the old GS came to me, that fateful morning in 2012, I knew it wa...

  What'll it do mister? There are no certainties in this life. All we can do is work with the best we've got, and to the best of our...

  Finally getting there... Once painting of the cases was done, I put the crank and gear clusters back in the crankcase. Turning everything ...

The 673 kit. The next step for the GS550 is to relieve the crankcases slightly so that the bigger diameter liners will fit inside. I'd j...

And skim the head! The next thing on the list was the broken fin on the barrels. I cut out a similar shape from some old aluminium that was ...

Slight Misfire Halts Play! It finally happened, I knew the engine was on borrowed time, but it's been happily running me around for the ...