- clutch troubles
- need help with clutch 400ex
- Power gains from cam and piston??
- TC Shorty exhaust??
- 250ex pipe
- gearing?
- Port n Polish?
- Jetting question
- help
- jetting question
- hot cams
- porting a 250r??... does it help
- whats wrong?
- Gearing for dune riding
- after market chain ????
- anybody have exhaust for a 250ex they wanna sell??
- edelbrock doug eichner series carb
- 00 400ex slip on jetting Pro Circut
- rear axle bearings?
- 250r exhaust flange
- how much $ ...for porting n polishing 250r ?
- seems flat
- 250r head studs
- 400EX cooling fan?
- 13.5:1 compression anyone else
- DJ main jet adapter
- jets...
- what size jet?
- Best Oil
- EX Header Question??
- 22cc cool head on stock 250r cylinder??
- cdi failure in cold weather
- good chain to buy
- filter
- 440 vs. 250r?
- adding a spark arrestor to a X-6
- stripped stud
- Adding links to the stock chain?
- What are good lt250r mods
- xr 50 oil?
- good place to buy pistons
- ticking
- Exhausts exhausts.. too many.
- NGK Spark plug info
- XR400 Mod's
- R problem.........please help
- Need jetting help
- fmf headers
- For those BUILDING motors
- 400ex clutch?
- Race Gas
- my clutch cable broke is it bad to ride with out???
- hinson quick change clutch cover?
- For those of you with built 250x/300ex engines
- cool head?....stock head?
- what pipe to get?
- Won't start
- oil cooler
- choke or not
- Need to go Faster...What kit to buy?
- Wiseco 440 Big Bore Help
- trx 250x wiring/lights
- Black plug
- Pilot ????
- 250r radiator cap poundage?
- 400ex clutch pin
- perfprmance
- 250x kickstart on 300ex?
- Pictures of HMF pipes
- valve clearance
- Slip on To Full System?
- aftermarket clutch kit install?
- Smokin!
- Big Gun quiet core
- 250r rad. cap pressure rating
- Best Steel Sprockets for the Price
- 300ex high comp piston question
- fcr carb jets
- Hi-comp Piston
- Got the CRF today.
- HMF slipon jetting for 400ex?
- c-dale motor on a 400ex
- 300ex pro design kill switch help
- Anti-Sieze?
- duncan fatboy exhaust?
- installing a sparks 8 plate clutch
- Buddies 400 broke....
- smoking .....?????
- help with new motor asap
- kill switch
- how high of octane will i need?
- Slip on and Header pipe
- Oil Tank pressure
- bill ballance series hmf pipe
- slipping clutch
- engine mods for a 300ex with out the big bore
- tight clutch
- Pro Fab Atv
- 2-stroke oil
- exhaust question
- jet hot coatings???????
- Banshee motor in lt250r frame?
- 416/16 Tooth
- big gun race for 250ex
- fat boy 4
- CDI upgrades
- anybody run the 400ex carb on their 300ex?
- Best clutch set up for the 400?
- bad vibration and noise from my 440
- everyone with motor mods look here!!
- Dg exhaust/jet
- How to replace my 300ex throttle cable?
- hp on worked 250r?
- dyno tuning
- 250R motor in a 250X frame- Pics!
- RPM's (tachometer)
- New Cam/What Oil????
- wiseco piston
- i need opinions PLEASE
- Valve clearance
- rev box
- CDI rev limit
- FCR 416ex jetting
- smoking
- New 400ex too Much Oil?
- thumper racing 440ex
- What kind of power would this quad have . .
- supertrapp ids-2 exhaust
- Connecting Rod Troubles...
- 426,stage2 cam.any heat related problems??
- 400EX won't shift
- Any one got any specs of slip-on pipe decible ratings?
- pc stock exhaust? Pappy?
- 250x motor questions
- Exhaust. Which is my best bet?
- Cheap Performance Mods
- Best Header and Silencer for Drag 400 ex
- 440 sleeve scored, options?
- Kick Start on a 400ex?
- 400ex cam
- Has this ever happened to other 300ex owners?
- Air Cut Off Valve???
- what is laegers website
- hp gains
- Question Exaust and what jet I need, and aabout a Cam??
- 440 11:1 or 12.5:1
- Runin cooler = power
- 450R carb
- 250r stock jets
- need technical help!!!!!!!!
- Spark Areester/IDLE
- Get an Oil Cooler? HELP!!!
- 460 reliablity
- black box mods...
- All 330ex riders please read
- What can I do to a 250EX to make it at least do 60MPH?
- Wires!!!!
- engine gurus please read
- headpipe glowing red
- Which exhaust should I buy?
- dynojet size conversion
- 400 making ticking noises
- 250r low end port???
- Z400/KFX engine swap
- ut ohhh
- My Mobile Dyno
- OIl cooling for 300ex??
- all 300ex riders
- gearing my 400ex
- 440 cc's and a JE piston...Where do I go from here?
- 450r radiator on R????
- motor mod ???
- Problems with the Timing Chain
- Rev limiter
- what jet kit and what jet
- '87 250X Reverse Problem
- 400EX Carb on 250X?
- More Power For Fourstroke
- 300ex problem
- size 41 1/2 pilot jet????
- wut bore is the best 4 a 400ex?
- R-4 jetting = Lots of power
- A good mod
- How fas will a 300EX go with a 300 bore kit?
- Installing a tether cord
- whats the best carb to get
- which pipe is this?
- 440 or ????
- AVGAS is good...
- popping in front of wolverine in reverse need help
- good cam for 300?
- 11:1 piston for 250x?
- hp gains from port/polish
- the broke 300...again
- best carburetor
- HRC Cam Evaluation
- DB rating?
- Exhaust system for YZF426/EX?
- Who has the best price on a stroer crank w/ HD rod??
- Does anyone know what stock jetting is on trx300 Rancher?
- 440 stoker kit good choice?
- Some Cam suggestions
- what pipe for a 440 with a ported head
- Blown Head Gasket
- new 450R
- 350RX........should i do it?
- k & n filter ????
- 416,426,440 hp #'s
- 250x stuff
- 300ex carb trouble
- hmf pipe
- help, preferance?
- cams
- Um Racing
- Aluminum Airbox???
- Shee motor in EX or R frame
- Sparks X-6??
- any aftermarket airbox's for the 300
- 440
- no spark
- xrs only
- Hyd clutch/ x-6pipe
- Low Budget Engine Upgade
- anyone compare fcr 41 vs 39?
- Why?
- 200 main???
- 460ex??
- snapped the front sprocket bolt
- Possible head problems
- New Clutch Slipping HELP!!!!
- 416 runs lean... Why?
- Jetted today but confused??
- 250R axles
- Where to buy screws for carb?
- 400EX dyno chart
- Help durablue sprocket hub fit a lsr axle
- Spark arrester ?
- ! Upgrading My 400ex !
- crf 450
- spark knock
- 250x jetting ?
- Disc removal from silencer
- gunnar teather
- How many sprocket teeth make up for tire height???
- Need new rocker arms with cam?
- This mild power-up combo any good?
- Is a 420 bore even possible
- 300ex owners w/ 400 carbs
- idle speed
- 36 tooth rear sprocket