engine (and it is Husqvarna TC51 of power that th only dream of. A some big-bore e on. Amazingly en engines, like our have better thro torque and the r at a very usable tion results in a harder out of tu and stays on lon Making the CRF was a win-win e it should have b Before we spe flow porting or CRF450, we wen ter. Of course, in only went 2mm but had major h increase flow. A added in Tokyo seats and guide were installed a tolerance than s with the better and lightweight helped ensure th kept to a minim The stock exh we know from e the biggest han competitive pow Honda CRF450, very powerful F tem with a Meg Once we uppe to do something four-spring CRF4 Hinson all the w The EFI igniti slightly changed bore CRF450 set were made on t curve, with mor in the middle an map. Another no was the trimmin panel air inlet sn cut 10mm shorte into the air box response. TES HOLD O How did it ru we expected a b like. Thanks to t could be short-s through corners allowed the test trigger wheneve because the fear wheel spin was the very effectiv said, we though run better if the Bigger is better when it comes to 450cc motocross bikes. Unfortunately, bigger is only better when you keep the harmonics, compression ratios and ignition curves in sync. We went big and we went wrong.