I had my mc 125 bored to 144 last winter. After a little hip cup got sorted out it works great. I mx'ed it all summer with no issues. You can come out of a corner and just roll on the throttle. Now that fall is hear we have been dong some woods riding and it works great there to. It lugs really well and has lot's of bottom. In my opinion it brings it really close to my brothers 200. Only more flickable. I still need to sort the jetting a little bit for woods riding but it works well. The only real reason I went with the 144 in the first place was the fact that the intake boot cracked at a sand race so I had to replate the cylinder anyway. The cost was the same either way.It does require that you clearence your cases though. In hind sight should of had it stroked at the same time to make the 153 as seems to be the best set up. The 125 worked pretty good in the woods too though. Just needed a little tiny more on bottom.
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