Will boring out the engine make it faster? And if so how much faster?

 

Nope,not really,just jumps the ccs up a little,a tad more hp at the most. Engine kits such as from Aaen and clutch kits can increase power and use that power to the ground,but you can expect to spend some $ The Trail Blazer is a fun,entry level atv.You might consider trading up to a larger sport machine as you can spend more than the atv is worth if you went to the max on aftermarket parts,plus reliability would be affected.Aaen Performance - Polaris ATV Two Stroke - Top End Pipes "Speedwerx, Inc. | Hypershift Clutch Kit | 1996-2006 Polaris 250 Trailblazer Hypershift Clutch K"

 

You can get an older Scrambler 400 for pretty cheap and it is a lot faster than the 250 without having to do anything to it.