MtnMaster
Active VIP Member
- Joined
- Feb 18, 2009
- Messages
- 328
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- 365
looking for anyone who has run a MaxRpms 488 or Athena 490 bigbore on a CRF450. What were the power gains and rideability? Any tuning issues, or running problems?
Any info would be appreciated before I decide which way to go, just a fresh stock top end or BB.
Any info would be appreciated before I decide which way to go, just a fresh stock top end or BB.