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Yz444 Tuning: Building a Monster Torque Curve
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[QUOTE="Masterphil, post: 825188, member: 55234"] I have decided that, if the funds allow, I will use the hotcams autodecompressor exhaust cam and intake cam. If I am unable to afford theese cams before I get the 444cyl and piston, then it will be installed with the stock cams at stock settings until I can get the hotcams. I have been playing with different meg and headpipe dimensions and here is what I think I will begin testing with. I have arrived at theese numbers simply because of packaging issues. I am going to start with a 1.75OD 18 guage header of stock legnth. The actual ID of the header is 1.654". I will begin the megaphone as early as the airbox, shock and frame will let me. The meg will be about 12" long with a 3.5"ID at the largest part. Then a reverse cone with legnth of 3" will taper down to a 2.5" exit. This will allow me to make about 8" of silencer without the pipe being too prone to crash damage. I doubt that the silencer will do much good since the exit of it will still be 2.5". Does anyone know the exit diamater of the Jemco pipe? I would like to at least base my numbers off of something. All these numbers have been chosen based on a thunder alley pipe, only larger, and being pulled out of thin air. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Yz444 Tuning: Building a Monster Torque Curve
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