Just thought I'd see what the scoop is on how these two motors stack up against each other. I'm more interested in how they compare as bored 103cc engines really. I have a 100cc CR85 setup for in a roadracer and was thinking of building a new bike. Being out of it for a while I noticed the 85sx seems to be a pretty sweet motor with the power valve setup, so I'm kinda keen on using this engine!
I wondered if anyone knows how these two engine stack up in terms of power delivery, tuning potential and parts cost/availablility? Also is it possible to buy just the 85sx motor new and where from?
