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03-25-2008
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 Which engine for 400ex frame? Ok guys I need your help. I am close to finishing my 87 250r project and I have another one to start on. I have been given a complete rolling chassis 2001 400ex. The only thing missing is the engine. Now what 2 stroke engine should I put in there? I was thinking of a 250r or CR250 engine. I can get a 96 KX250 engine for $200 that needs rebuilding but that may take a bit more fabricating than I can do. And I thought about a CR500 engine. Steer me in the right direction here guys. Any input or thoughts will be helpful. Maybe a banshee engine???
__________________ 1987 TRX250R...Flotek porting, Flotek lightened flywheel, Boyesen Pro Series Reeds, FMF SST pipe, Curtis Sparks silencer, Cool Head w/18cc dome, Keihin 38 Airstryker carb, Burgard +2 a arms, 06 450R front shocks, TAG bars, Janssen steering dampner, Nology coil, MSD Wire, AC bumper, AC nerf bars, Maier plastic, Elka valved stock rear shock w/DRS, ITP Baja black wheels, Kenda Klaw front tires, ITP Holeshot GNCC rear tires. Coming soon...Fasst Flexx Bars, 4 gallon tank. 1996 Banshee...Pro Circuit Pipes & silencers, Pro Series reeds, CFM Performance aluminum air box, Uni filters, Razr 2's, ITP wheels. Coming up...a new clutch; it's toast! Lightened flywheel, +4 timing, Nology coil & wires.      |
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03-25-2008
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| get a cr500 motor... i hear that thing rips ass... but you better know what your doing... personally i would rubber mount it... but thats me...
__________________ 1986 Honda Trx 250r Hot Rods +4 Stroker Crank V-Force Reeds Fmf Fatty Pipe and Silencer Shaved Head Tusk Clutch Kit Hinson Clutch Basket Keihin PWK 39 Carb DG Steel Series Nerfs AC Racing Grab Bar and Bumper Lone Star Racing Brake Block Off Plate Laeger +2 A Arms 1985 Honda CR 125R Dg Type 2 Silencer Fmf Power Reeds Hot Rods Crank |
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03-25-2008
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| I'd got with a trx250r motor, no vibration issues and shouldn't be much to fab up.
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03-25-2008
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| Yeah i was thinking of a 250r motor...that would be the easiest route i think. Maybe some kinda big bore/stroker combo around 350cc.
__________________ 1987 TRX250R...Flotek porting, Flotek lightened flywheel, Boyesen Pro Series Reeds, FMF SST pipe, Curtis Sparks silencer, Cool Head w/18cc dome, Keihin 38 Airstryker carb, Burgard +2 a arms, 06 450R front shocks, TAG bars, Janssen steering dampner, Nology coil, MSD Wire, AC bumper, AC nerf bars, Maier plastic, Elka valved stock rear shock w/DRS, ITP Baja black wheels, Kenda Klaw front tires, ITP Holeshot GNCC rear tires. Coming soon...Fasst Flexx Bars, 4 gallon tank. 1996 Banshee...Pro Circuit Pipes & silencers, Pro Series reeds, CFM Performance aluminum air box, Uni filters, Razr 2's, ITP wheels. Coming up...a new clutch; it's toast! Lightened flywheel, +4 timing, Nology coil & wires. |
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03-26-2008
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| For sure i would go with a counterbalanced engine, it will be alot easier in th end. Next, What type of riding do you want to do with it? If your going to MX or trail ride it I wouldnt go any further than a 250CC.
__________________ 1985 LT250R Quadracer Manufacture Date: 12-84 +8mm Hot Rod FloTek Drag/Dune port w/ Head Mod LA Sleeve STD Weisco Piston AAEN Pipe 1Dirracing Ported Reed Block w/ Secrets Keihin 39mm PWK Nology Pro Fire Coil & HotWires 7oz off FlyWheel Barnette Kevilar Clutch Kit UNI filter +2 +1 Chrome Burgard A-Arms +4 Chromoly Swingarm WORKS Fronts w/ Rezzys DuraBlue Rear Strut Billet Twin Row Carrier LSR Axcaliber +2 Axle & LSR Brake Hub "If your not scared, your not safe" |
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03-26-2008
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| 250r!!!!!!!!!!!!!!!!!!!!!!
__________________ 1986 Honda TRX250R outerwears shock covers painted red frame painted silver swinger painted silver A-Arms K&N air filter FMF fatty pipe FMF turbine core 2 silencer wiesco prolite piston bored .20 over jetted perfect 12/39 sprockets primary drive chain Boysen super stock reeds |
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03-26-2008
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| built 250r would be best... That kx250 is cheap and would haul ass, but the vibes would be annoying... the 250r swap would probably be the easiest and most rewarding |
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03-26-2008
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| Quote:
Well my 87r is set up for the woods and trails so this one would probably be set for drag racing or just balls out top end power.
__________________ 1987 TRX250R...Flotek porting, Flotek lightened flywheel, Boyesen Pro Series Reeds, FMF SST pipe, Curtis Sparks silencer, Cool Head w/18cc dome, Keihin 38 Airstryker carb, Burgard +2 a arms, 06 450R front shocks, TAG bars, Janssen steering dampner, Nology coil, MSD Wire, AC bumper, AC nerf bars, Maier plastic, Elka valved stock rear shock w/DRS, ITP Baja black wheels, Kenda Klaw front tires, ITP Holeshot GNCC rear tires. Coming soon...Fasst Flexx Bars, 4 gallon tank. 1996 Banshee...Pro Circuit Pipes & silencers, Pro Series reeds, CFM Performance aluminum air box, Uni filters, Razr 2's, ITP wheels. Coming up...a new clutch; it's toast! Lightened flywheel, +4 timing, Nology coil & wires. |
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03-26-2008
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| An 88-90 Quadzilla motor would be challenging but bad ass in the end. |
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03-26-2008
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| go with a cubbed banshee motor LOTS of power
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