The best replacement for 125 is 250.

The best alternatives to 125 are rated as following:
★★★★★  250
★★★★  250f
★★★  250 2 stroke
★★  100 grain broadheads
★  450
★  rxz
★  yz 250
★  das
★  100 grain broadhead
★  crf 150
★  activa
★  135
★  250 two stroke
  cr 125
  pcx
  62.5 125
  130
  yz 125
  rr
  yz85
  80
  lc
  85
  raider 150
  wego
  cafeteria plan
  126
  150
  vino 125
  xrm 125
  xr 125
  kawasaki fury
  yamaha zuma 125
  rm 125
  aviator
  ex5
  palladium103
  honda pcx 150
  50 125
  tom tom 130
  bros 150
  garmin nuvi 200
  125
  mirage 150
  158
  nikon 18 70
  zuma 125
  suzuki thunder 125
  cr 250

Your alternative for 125 is not listed? Suggest!
Speaking about 125, one probably shouldn't forget about ovarian cancer.

Other search terms related to 125 and their ratings are:
★★★★★ ovarian cancer
★★★★★ endometriosis
★★★ sidecar
You have in mind a companion for 125 and it is not yet here? Propose!



Google Trends

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250
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