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Senior Member
Not just another exhaust?
I just got done "fabricating" a stock 400ex exhaust slip on onto a 250x with a cobra head pipe. The cobra broke and it is a P.O.S. so instead of buying a exhaust I was being recourceful and used what I had. It runs and doesnt backfire. It has descent bottom end but falls off on top (I think) but I have a 400 and the 250 is my friends and dont ride it much. So my questions are is this bad? Will it be ok? And what should the jetting be around, I have no idea where to start?
2001 Yellow 400ex
WB R4 full system
Uni air filter
No airbox lid
160 MJ 42 PJ
Tusk handle bars
Tusk Nerfs
MSR Gripper Levers
Black Maier Handguards
Titax 14 tooth front sprocket
Kenda Klaw Rear 20in.
All Balls axle bearings
Front 21" Razr PR on flipped stockers
WB rev box
Custom black plastic a-arm guards
Powder Coated things
ALL IN PIECES 4 WINTER REBUILD!!!
Senior Member
anyone?
2001 Yellow 400ex
WB R4 full system
Uni air filter
No airbox lid
160 MJ 42 PJ
Tusk handle bars
Tusk Nerfs
MSR Gripper Levers
Black Maier Handguards
Titax 14 tooth front sprocket
Kenda Klaw Rear 20in.
All Balls axle bearings
Front 21" Razr PR on flipped stockers
WB rev box
Custom black plastic a-arm guards
Powder Coated things
ALL IN PIECES 4 WINTER REBUILD!!!
You Know!
I don't think it'd be a problem, i've seen quads and bikes with other quads and bikes exhausts.
Not sure about the jetting, you might just want to run it, and check the burn on the spark plug.
2004 Yellow 300ex
- HMF Slip on pc/d black chrome, K&N air filter, Dynojet, DG nerfs and bumper, AC grab bar, red shockwears, 21" front and 20" rear Razrs, Works Triples, Burgard +3's, Tusk extended rear hubs, JT 14t front sprocket, Pro Design tether kill switch, Maier 250r hood, N-Style 400ex graphics and seat cover, Renthal CR high handlebars, 50/50 Grips, MSR gripper levers, UM swinger skidplate, Tusk p-brake blockoff...
04 Yellow Honda CB600F4 (599) Street Bike
D&D polished s/o w/ midpipe, Renthal Ultra-Lows, Frame sliders, K&D signals, Keiti tank pad, and wheel stripes, gettin 55+ MPG!...
98 Dodge Durango 4wd
- 31x12.5R15 Pro-Comp Mud-Terrains on Mickey Thompson 15x8 Classic II's, Flowmaster dual exhaust, a couple of Pro-Comp Stainless 130w 6" spotlights, Cobra CB, JVC Head Unit, 2 Kicker 10" Subs, Lanzar Heritage amp, SPL Capacitor, Polk Audio 6.5's & 6x9's, and 2 sets of Pioneer 6.5's, All hooked up with Stinger wiring...
91 Maroon Chevy Silverado ext. cab, 2wd, 350 - Gone but not forgotten...
Senior Member
if u take the baffle out it will prolly help, get better air flow
1993 banshee
it has
2n1 intake
2n1 breather box mod
electron carb
cool head
2n1 moto fast pipe
razers
moose bars
full skid
hand guards
prm bumper
gripper seat
0ne industries graphics
wb break block off
10inch rims all the way around
side cover insert
degree key
trail tech computer
new rotor
kick ups
reed spacers
reversed front rims.
case saver.
shifting star mod.
extra set of plastic
moose clutch
painted blue water pump cpver and side cover insert
also the swing arm
and more
Senior Member
I did take the baffle out (spark arrester) it isnt very loud but it sounds descent.
2001 Yellow 400ex
WB R4 full system
Uni air filter
No airbox lid
160 MJ 42 PJ
Tusk handle bars
Tusk Nerfs
MSR Gripper Levers
Black Maier Handguards
Titax 14 tooth front sprocket
Kenda Klaw Rear 20in.
All Balls axle bearings
Front 21" Razr PR on flipped stockers
WB rev box
Custom black plastic a-arm guards
Powder Coated things
ALL IN PIECES 4 WINTER REBUILD!!!
Seven3
I got bored the other day, and since I'm getting a new exhaust soon anyways, I sliced about 3 inches off my Pro Circuit T-4. It works pretty good. Kinda loud though. Anyways, I noticed after I did my jetting was off. I had to up it from like a 128 to a 150. So if you're running a K&N or similar filter with no airbox lid, I'd recommend starting with about a 144 or 146 main jet. Also, seat the airscrew all the way, and turn it back out about 2-3/4 to 3 turns.
Senior Member
thanks alot but does the 250x carb use the same jets as the 400ex if so I would use my stock jet
2001 Yellow 400ex
WB R4 full system
Uni air filter
No airbox lid
160 MJ 42 PJ
Tusk handle bars
Tusk Nerfs
MSR Gripper Levers
Black Maier Handguards
Titax 14 tooth front sprocket
Kenda Klaw Rear 20in.
All Balls axle bearings
Front 21" Razr PR on flipped stockers
WB rev box
Custom black plastic a-arm guards
Powder Coated things
ALL IN PIECES 4 WINTER REBUILD!!!
Seven3
You definitely don't wanna use the stock jet. It'll run waaaay too lean. If you're running a 400EX carb, then get a jetting kit for a 400EX. Just put in between a 150 or 155 main jet either way, and it should work great.
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