The first questions you may want to ask yourself is...
"What do you want out of the bike?"
"How much are you willing to spend chasing torque and HP on an engine as small as a 250?"
'Is the bike used for commuting or racing?"
"Are you willing to trade good gas mileage for crappy gas mileage and unnecessary extra maintenance and work?"
If you are a a budget minded owner and looking for a little extra pep, keep the bike rideable and easy to maintain with out breaking the bank, there are a few things you can do.
First, is arm your self with some knowledge read all that you can and then consider doing a mod that will enhance your safety.
How Constant Velocity Carburetors Work
Motorcycle Carburetor Theory 101
Pipe Jetting (A Must Read)
Carburetor Jet Tech
These few improvements are easy to do, don't cost a lot and will make the bike respond and ride a little better.
1. Shim the needles with (2) two 3mm washers and remove the snorkel. Shims and a little bit more fuel to the 1/4-3/4 throttle range, a little more fuel results in better throttle response-(simple, don't complicate it)(If you have a slip on exhaust removal of the kleen air system is optional if you don't mind the popping.)
2. Replace the stock air filter with;
WIX- P/N: 49721
UNI Air Filter- P/N: NU-2303 or
Pipercross Performance Air Filter
- P/N: MXP166 (highly recommended)
4. Leave the airbox in. There is no real need to replace it with pod filters unless you like unnecessary work & spending more time tuning than riding. The exact same or similar results you get with pods you can get with the stock airbox and full exhaust system
3. Install Iridium Spark Plugs
-either NGK Iridium CR8EIX
or The Denso Iridium IU24
4. Run 87 octane gas
, it make more power. Use ethanol free
if you can get it.
5. Run full synthetic oil
6. Change your sprocket set up to 15/43, it offers the best balance of acceleration and top speed.
7. If you got a couple hundred dollars, you can change your engine timing. the BRT i-DTIS
offers the second most significant gains to HP and torque as far as add ons go. The first is the full exhaust.
8. Learn to ride better by practicing and reading some good motorcycling tips and advice