- Black box mod
- cams
- best piston to run in my 250r
- link to jetting guide??
- heavy duty timing chain
- C&d Racing 416
- bearing carrier help
- Getting new K&N filter!!
- MX pipe for 300ex help???
- rear axle end(hub) nut
- engine trouble
- Bigger cylinder studs
- Blue smoke?
- why the price difference between 4stroke and 2stroke pipes?
- FCR help
- 350x break in
- 650ex conversion
- Is this bad?
- Q's on 440 prices?? Pros and Cons??
- 250R jetting help
- Please Help Me!!!!!
- This Is Sweet
- 400ex motor question?!? HELP
- how much air do you think the outerwear hods back ?
- amount of oil
- compression and gaskets??
- FCR MX Carbs????
- 2004 400ex new carb!!
- Clutch instalation question
- 416ex gasket and timing chain ?'s
- Combustion chamber mod
- 440 kit
- Look at this bull
- sprocket help
- carb help
- lightening the flywheel...explained!
- i need help with a yz426 in 400ex frame
- duncan PC4000?
- Bigger studs/stud fix??
- help counter balancer 250r?
- Se7en racing oil tank?
- 426 kit
- 416 with 12.1 compression
- motor question
- head work....
- 400ex and 300ex starter?
- Hotcam Stage2 Long Term Update
- guess who the idiot is??
- Motor Decisions
- modify air box or don't modify air box??
- Splitting Cases?
- quick base gasket question...
- oil rings (PLEASE HELP)
- HELP....wiring an XR kill switch on a 300EX
- More 500ex problem
- 400ex clutch lever on 300ex?
- degree key for 300ex?
- Flywheel Specs?
- rad taperd bearing carrier installed but QUESTIONS PLEASE ANSWER
- Air Box Question???????
- bogging/sputtering
- What to do with my new exhaust?
- rev limiter
- Pro Fab 330 installed
- 300ex mods?
- 2001 400ex buildup
- Question about Airbox Lid!!!!!!
- 450r ?? comments
- What 2 do with Airbox Lid?
- FMF Power Core IV? or WhiteBrothers R4
- 416 timing Q?
- new rear tires,should i change a sprocket
- How many psi in head pressure?
- finding TDC with advance key installed?
- Transmission Final Drive Ratio
- jetting help
- Hard to idle
- 440 stroker kit
- intake manifold
- stage 1 hotcam
- 250r flywheel
- whats next for next year?
- hey you guys with a 39 fcr
- degree key question ?????
- why is 250r the best
- Head Pipes???
- how do u get started cc racin
- 300EX K&N Jets
- 440ex ?'s
- Stage 2 hot cams
- CAM's
- what carb?
- best parts for the 440 stroker
- 250r motor kits
- leaky carb..
- So this 250R came in to school today..
- CDI and timing key
- The neverending jetting question!!
- 300ex jetting
- pic of 300ex with street bike engine
- what model carb does a 400ex have???
- valve adjument
- cylinder problem...
- Bigger Head Pipe Diameter?
- pipe blow out
- Reverse for 400 ?
- Best Gasket?s
- how much will it bring?
- will it work?
- what gearing on a 440 ex
- sputtering or bogging
- ?
- Cylinder/header?
- 250x motor in 300ex
- 250x wont start...
- J.E 11:1 piston
- valve
- rev limiter
- 300ex problems
- SPEED: 350X vs YFZ450
- who has a built motor?
- compression ratios
- cam comments / ideas
- Question about a wierd looking screw
- drop in cam that gives best top end?
- Why is my 400ex smoking???
- 250x is smoking after rebuild--????
- i have a problem im new and need help
- Used Hardfaced Rockers?
- Is this a good idea?
- sparks timing key?
- 250r leaking coolant
- 416ex Ross or JE and what exhaust?
- Yoshimura Header????
- Head stud pulling out of the cylinder
- cam timing
- JETTING and it's effect on 440 engine temp... HELP!
- 416 or 426?
- DG Exhaust
- bummer?!
- Which Cam?
- 350x jetting
- Blown head gasket (with a twist)
- Kill switch
- LTE exhaust...
- 416 stroker
- 300 ex exhaust
- Man I HATE this!!!!
- Aftermarket parts
- exhaust system
- Blowing fuses
- 250ex owners I got a question
- I need a 250ex Pro Circuit endcap NOW!!!
- does any 1 else have this
- piston clips..
- TC or Hot Cams
- Kawasaki Lakota sport engine problem's please help!!!!..........
- Rotory Engine
- sparks ignition key? who has one?...
- what gearing can a 406 pull??
- Who has cut down their silencer?
- THE RESULTS: My fully built Duncan 440ex vs a stock yfz450
- tips for getting 300ex motor back in frame
- Need some help with jets.
- idle problems when cold and its coughing
- Any Top Speed Gains?
- is a kick start possipossible
- Zero Balls Top End? Help
- Where I can find a C-Sparks X-6 Ceramic Exaust System???
- Port Work Worth The $
- Four Stroke Tech oil cooler
- anyone using magnetic drain plugs?
- need more power out of my 400EX....
- which gaskets on my R?
- Anyone ever install a stainless line on magura clutch
- hotcam valve clearance
- oh my god im in serious trouble please help
- removing 250x kickstart shaft?
- bored stock carb
- What do I need to do for jeting my 300ex!!
- 2003/TRX250EX/backfirescreen
- Bottom end rebuild
- any luck re using a 400ex head gasket
- Front Sprocket
- 416 jetting
- 400ex Turbo Charger
- Back Pressure
- 400ex Yoshimura Comp. System
- Airbox Lid Question on 400
- carb poping
- What are the BEST Clutches on the market for a 400EX???
- Taking 300ex baffle out
- Questions on 330 kits....
- wut do yall think about the big gun?
- 416?
- fresh 416 start prob
- Best AIR SCOOPS & OIL TANK?
- Reassembling cilinder
- No power
- Rejetting for Colder weather?
- I need help fast want to play this weekend
- Crf Cam Chain
- 440ex Q?
- need help fast, heli coil
- need help jetting!
- 400EX Exhaust
- R-4 .... good or bad?
- Impossible to find neutral...MAGURA?
- moving the needle up or down?
- shavings in oil?
- Broken exhaust stud wont come out
- HMF Quiet core ?
- should i jet
- slip on vs. full
- 426EX vs Raptor?
- Which Exhaust ????
- i dont know what i did?!? but shes alive
- suggestions on upkeep for 440 ex
- Whie Brothers Question
- Does This Sound Right????
- striped spark plug hole
- Engine Mods? Mx Racing
- 250R Aluminum Air Box
- E-series question
- Shes almost done!!!!!
- Shaved or Unshaved
- white brothers R-4 baffle
- valves question
- R-4 jetting & and other ?'s
- Information Please
- removing snorkel
- Sparks exhaust jetting
- 400ex jetting
- New Honda only kick start?
- looking for some help guys!
- Carb Screws
- New pipe on the way. Carb question.
- K&n power lid
- degree key question ?
- New Tires
- lrd slip on
- Head stud installation
- Je Piston Install?
- airbox Lid.....
- how do you make a CR250 kick forward?
- drain bolt help!!!!!!
- Blown head gasket
- bogs when i wheelie
- Dam FCR
- only a 250x