Join Date: Aug 2011
Location: southern Arizona, USA
Thanked 408 Times in 317 Posts
What Mike is really telling you is that if you get the tool to reprogram the ecu (engine control unit) you will use more fuel (decrease your gas mileage), have poorer low and mid range performance, but eek out more horse power at high rpms.
It is more practical to keep the bike stock and buy a bike with a larger engine in the future when you are ready for it.
If you are not racing, there really isn't much reason to try to modify the engine. You normally pay a lot for a little gain, and engine reliability and life span usually suffer.
John: '09CRF230L (Li'l Red Piglet), '89NX250 (sold)
Propelled by Penguin Power
Nekkid motorcycles feel faster
1st bike: a gently used 1958 Matchless 250 thumper