ENGINE MODIFICATION

ENGINE

It is your choice on how powerful the engine will be. You will need also to save a budget for this work because engine power up will cost a little. If you will be short on budget you can do the following.

 Most people would agree that there's no replacement for displacement, but if you want to add some hp without bumping up the cc, you can try to make your engine breathe a little better by giving your cylinder head assembly a complete head work, like port and polish, shave the head for a higher compression rate, replace or regrind the cam to a more aggressive profile and stiffer valve springs (if available). 

A bigger carburetor and free flowing exhaust system will compliment the make-over. But if you're looking at just bolt on power adders, there's really not much other than bigger carburetor  and ditching the restrictive stock muffler for an open after market pipe. 

And maybe an ignition upgrade too.

But if you have a good budget you can choose the bore up. You can search or ask someone with knowledge about engines. You should be careful on choosing the mechanic that will work for your engine upgrade.