Thack82 Posted March 28, 2011 Report Posted March 28, 2011 Okay guys I'm thinking about buying a new set of Carburetors for my 2004 Yamaha Banshee. The stock Carbs I'm currently running leak, and I think a set of 28mm or 30mm Mikuni's would aid my set up quite a bit. I want to stick with Mikuni's because I'm comfortable working on them. I put a Vito's stage 3 Jet Kit and a Motion Pro T.O.R.S. Delete kit on them with no problems, and they seem to be easy to tune and simple. My brother has a 1989 Honda TRX-250R and he replaced his stock 34mm Keihin with a Keihin PWK 38mm Air Striker on his bike and it made a huge difference throughout the entire power band (Low/Mid/Top End). I Trail Ride, Run Hare Scrambles, and Drag Race (300ft) at the local County Fairs. Please take a look at my upgrades and give me your personal input on what Carb set up you would recommend for my Banshee and my riding type. Location Information: State: Kentucky Elevation: 238 meters (780 feet) above sea level 2004 Yamaha YFZ-350 Banshee Modifications and Specs: Engine: Bore: . .020 Crank: Hotrods Forged Replacment Pistons: Wiseco Forged Pro-Lite Port Work: None as of now "Aggressive Trail Port Is planned for mid June 2011 By Wild Cards Racing"1 Plugs: NGKR BREADSIX Iridium Spark Plugs Reeds: Boyesen Power Reeds in Chariot Billet Cages, with .5 inch Billet Reed Spacers Boost Bottle: Magnum Billet Boost Bottle Carburetors: OEM 26mm Mikuni with Vito's Stage III Jet Kit (320 main jets and #30 Pilots) Exhaust: Paul Turner Mids and Fat Boy II Silencers Air Intake: Ready High Flow Filter In OEM Air Box with Outerwear's High Flow Lid, UNI push in intakes, and Snorkel Removed Head: Trinity Stage IV Cool Head with 20cc Domes Cooling Modifications: 30% Bigger Aluminum Radiator, Mod Quad Billet Water Pump Housing and Impeller, Dual Mod Quad 2" Inline Coolers Lubricants and Additives Used: (Ounces/Gallon) Klotz Super TechnoPlate Full Synthetic 20% Caster 2 Stroke Oil (32/1) Klotz Octane Booster (1/1) Marel's Mystery Oil (2/1) Red-Line Super Cool ATV Coolant with Water Wetter, and AMS Dominator Coolant Boost. (25% mix Prestone/GM Dex-Cool) Transmission: Clutch: Drive Line Heavy Duty Trail and Track Clutch (Friction Plates and Steels out of a YZF-1000) Clutch Basket: Barnett Billet Clutch Basket Clutch Lever: Streamline Billetanium Hydraulic Clutch Lever with Billet Slave Cylinder and Stainless Steel Braided Clear Plastic coated Line Shifter: Mod Quad Break Away Short Shifter Lubricants Used:<br style="font-weight: bold;"> Klotz Flex-Drive 30 Streamline Synthetic Mineral Oil Suspension: A Arms: Full Flight +3+1 Silver Vein A Arms (For YFZ-450 Shocks) With 12 Point Adjustable Chromoly Heim Joints Tie Rods: Full Flight + 3 Tie Rods with Tusk HD Tie Rod Ends Handle Bars: Fly Silicon filled Chrome Handle Bars with Pro Taper Grips Front Shocks: 2006 Yamaha YFZ-450SE Silver Nitrogen Shocks Rear Shock: OEM Banshee Shock Silver Spindles: 2010 OEM Yamaha YFZ-450R Spindles Hubs: 2010 YFZ-450R Hubs with Upgraded All Ball's Bearings, The rears are OEM YFZ-350 Hubs with Upgraded All Ball's Bearings Steering Stem: 2006 YFZ-450 Steering Stem with Lone Star Flag Brakes: YFZ450R Dual Piston Front Brake Calipers With Galfer Pads in the Front And OEM YFZ-350 Rear Caliper with Alba Rotor and Galfer Pads Axle: Forward PowerSports +1+1 Heavy Duty Forged Rear Axle Swing Arm: +2 Swing Arm Wth OEM Style Carrier and Skid Plate Mount. " All Ball's Upgraded Bearings in Carrier Housing" Wheels: Rear 9", 3:5 Dishing ITP Baja T-9 Aluminum Wheels with Bend Ring, Front 10" Douglas Yellow Label Aluminum Wheels with 4:1 Tires: Rear 20X11-9 BKT AT-111* 6 Ply "Maxxis Razr Knock Off's". Front 21X10-7 BKT AT-111* 6 Ply "Maxxis Razr Knock Off's" Guards/Bumpers Skid Plates: DG Baja Series Full Body Skid Plates Swing Arm and Belly. Qualex Custom a arm Skid Plates Guards: DG Front and Side Frame Guard, and Maier Rear Rotor Guard, Qualex OEM Replica Forged Steel Front Bumper, DG Rear Bumper, DG 6 Pack Rack. Lubricants Used: Super Syn Synthetic Grease Prestone DOT-4 Synthetic Brake Fluid Interchangeable Part's: Front Plastic: Black Maier Raptor Style Front Plastic Red Maier OEM Style Front Plastic Bumpers: Polished Aluminum JAW'S Front Bumper Qualex Forged Steel OEM Replica Front Bumper Wheels/Tires: OEM Aluminum Wheels Set # 1 ----------------------------------Terf Tamer Turf Tires 98% Tread Life (Front=20X6-10)--(Rear= 22X12-9) OEM Aluminum Wheels Set # 2----------------------------------- ITP Hole Shots 65% Tread Life (Front= 20X6-10)--(Rear=20X10-9) Douglas Blue Label Polished Aluminum Wheels-----------------15 Paddle Scat Track Haulers/ Smoothies 99% Tread Life (Front=21X7-10)--(Rear=24X10-10) Seats: New Black 1999 OEM Yamaha Banshee Seat OEM 2004 Yamaha Banshee Seat with Black and Red Flame Leather/Gripper Seat Cover Headlight Covers Red and Black Eye Ball Covers Silver GYTR Headlight Covers Quote
okbeast Posted March 28, 2011 Report Posted March 28, 2011 I'd get with Wildcard and see what he thinks. You don't want to buy 2 sets of carbs 4 months apart I don't think Quote
06specialedition Posted March 28, 2011 Report Posted March 28, 2011 That's one big post With those mods your stock carbs will work just fine. I still run stock carbs on my Wildcard aggressive dune ported bike with no issues..... Although I may be getting some 34 Mikuni flat slides from Brandon soon. (trying to decide between new carbs, or some Stellar a-arms) If you absolutely want to upgrade I would look into some 28's or along those lines. I know Brandon at Wildcard prefers Mikuni and runs them on his personal bikes. Quote
Thack82 Posted March 28, 2011 Author Report Posted March 28, 2011 (edited) That's one big post With those mods your stock carbs will work just fine. I still run stock carbs on my Wildcard aggressive dune ported bike with no issues..... Although I may be getting some 34 Mikuni flat slides from Brandon soon. (trying to decide between new carbs, or some Stellar a-arms) If you absolutely want to upgrade I would look into some 28's or along those lines. I know Brandon at Wildcard prefers Mikuni and runs them on his personal bikes. Sorry about the length of the post, I just wanted to make sure that you guys had all the information. I just copied and pasted my build sheet to the thread. I would like to buy a after market intake to go along with the Chariot Billet Reed Cages, and Billet Reed Cage Spacers. When I checked BHQ feed back on the reed cages some of the guys said you wouldn't get the full potential out of them unless you bought the intakes. I've just about bought every upgrade for the motor. If I had it to do all over again I would have put a Hot Rods 4mil Stroker crank and Stroker Pistons in it vs the Hot Rods Replacement Crank and Wiseco Pro-Lite Pistons. At the time I didn't really know to much about the Stroker kits. A 4mil Stroker with an Aggressive Trail Port and my bolt on's would have been bad ass, and I would have been putting out a lot more power. I'm going to buy a new set of Carbs regardless so I might as well buy a 28mm. I'm so sick of leaking out high dollar 50/50 93/100 Octane and high priced synthetic 2 stroke oil. I've took my carbs apart 2 or 3 times and I ended up replacing the floats and gaskets. When I re-jetted for my Outerwear's Pre-Filter I noticed that my left Carb was missing a little short brass tube that runs straight up and down, so I cut the end off a WD-40 spray straw and put it where the brass tube was missing. It didn't help or hurt anything they still leak. I have no clue what happened to the brass straw. The previous owner of my shee was a real dumb ass. Pretty much all they did with it was ride up and down a black top country road and do burn outs. I just about replaced or upgraded every part on the bike except the frame. About the third or fourth time I rode it I broke a ring. The mechanic at the shop I took it to said they hadn't been running a air filter, it needed a new top and bottom end, all new wheel and carrier bearings, and new sprockets/chain. From there I became obsessed and well here I am. As far as porting my Cylinders; with the mods I have will I gain a lot of power? After I get my port work done and I add new carbs and a aftermarket intake what kind of numbers do you think I'll be putting down? And last but not least other than the three things I listed above do you know of anything else I can add to my bike to get more power and performance? Thanks for taking the time to read this and answer my questions, I want my Banshee to be all it can be. Jim Edited March 28, 2011 by Thack82 Quote
Thack82 Posted March 28, 2011 Author Report Posted March 28, 2011 That's one big post With those mods your stock carbs will work just fine. I still run stock carbs on my Wildcard aggressive dune ported bike with no issues..... Although I may be getting some 34 Mikuni flat slides from Brandon soon. (trying to decide between new carbs, or some Stellar a-arms) If you absolutely want to upgrade I would look into some 28's or along those lines. I know Brandon at Wildcard prefers Mikuni and runs them on his personal bikes. Aftermarket a arms are a great upgrade. I put a set of Full Flight +3+1 a arms on my Banshee and I love the way it rides and handles now. I ended up going with the Full Flight a arms and all the 2010 YFZ-450R Components and I'm very pleased with the out come. I have been harassed by a few HQer's so much over it that I just about deleted my BHQ user account. My Specs ended up being almost dead on the 2010 YFZ-450R after I got everything installed, and other than the steering being slightly stiffer it rides and handles just like a YFZR. The comparison specs are on the photo bellow: Quote
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