ORIGINAL: rccheech
Nik, what do you not like about STS engines, I've never had one so please fill me in.
I had an STS .21T. It was Dadders modded stage II and presumably an XTM factory driver's backup engine.
The bearings had a lot of play in them after break in and there was mega crank walk. The carb did not tune well and the the brass on the end of the slide broke.
Dont get me wrong, it was a fast engine. I idled well too. I ran it up and down the sidewalk after break in and the crank broke. The nub where the rod attaches to sheared right off.
They had quality issues. I don't know if they were fixed, but I hope they were.