2004 trx450r high comp piston, stage 2 cam, 44 fcr , dasa adapter, cut air box, sparks drag pipe
I have a 2004 450r. Motor is built by Curtis sparks. I have a sparks high compression 13.5.1 piston, sparks clutch, sparks valve spring kit, dynatek programmable cdi, stage 2 hot cams, fcr carb that is bored to 45 on the air intake side dropped down to about 42.5 in the middle and 43.5 on the engine intake side. The measurements are not 100% exact. I’m putting on the sparks reversible megaphone pipe. I already have the normal ceramic one and it works great just getting some more power. I also have a clean up port from Curtis sparks that I will be having changed to a drag racing port as soon as I possibly can. Bike feels like 60-65 hp. Don’t think it’s ever been dynoed. Used to be my dads and he would smoke dasa 480s, yfz520 on nos, and other built quads. Everyone else kept getting more motor work and he didn’t want to. He sold the quad and I got it back. He would only loose to crazy fast banshees and 1100cc rzrs. So I’m guessing the bike has to have some serious power. What do you guys think it puts out. All the quads out at pismo are professionally built. He took home the trophy one year. Keep that in mind.