Welcome to the new and improved(?) Yamaha 2-stroke FAQ!
I’m sure there’s more threads, questions, and links everyone would like to see included, but this thing is starting to get pretty lengthy. I tried to include links to threads that contain good info pertaining to somewhat common questions. This is a mix of the old FAQ, suggestions in there, and a few other links/posts. If you don't see what you are looking for in this thread, TRY THE SEARCH FEATURE! There’s 1,000 times the information available through searching than can be fit in this little post.
Engine
[indent]• Squish Band
[indent]o Squish Band Measuring By RB Designs (link external from Thumpertalk)
o RCannon’s RB Designs Head Mod
o THE Squish Band Thread [/indent]
• Jetting
[indent]o Is Your Two Stroke Running Rich? : All about jetting
o The Great Spooge Experiment : Discussion/debate of causes and cures of the dreaded exhaust spooge.
o YZ 2 Stroke Set Up Database : Thumperalk user's engine mods and jetting[/indent]
• Big Bores
[indent]o Powerseal YZ 290 : CCC4’s review of his bike
o MaxPower 285 Build : LOCKGUY's enduro built ride
o Eric Gorr YZ300’s : mrmoto’s , RCannon’s
o Harris Performance YZ144 : PAdaytonaman’s review[/indent]
• Misc
[indent]o YZ250 Timing Thread : Covers timing setup for 99+ YZ250 engines
o De-tuning a YZ250 : Ideas for making smoother, easier to control power for off road riding
o Wiseco vs. Stock : The never-ending argument, forged Wiseco, or stock cast piston?
o RB Head and Big Bore Carb for YZ250 : Review and info from HollywoodMX
o Why top ends need regularly scheduled maintenance
[indent]o BLACKeR's extreme piston breakage! (pics)
o UpAllNight's broken piston skirt (pics)
o cab500's broken piston skirt (pics)
o slimjaty's broken connecting rod (pics)
o slow hand's broken piston skirt[/indent][/indent][/indent]
Exhaust
[indent]o YZ250 Pipe Shootout : Lots of info about the pipes available for the YZ250
o YZ250 Dyno Shootout : Simular to above, but with more than just seat-of-the-pants evaluation
o Port Tuner Insert: Customize the power characteristics of your YZ250
o Pipe Spacer Thread: add more low end, cheap pipe tuning.
o Make Your YZ250 Quiet , with a FMF Q Stealth
o dBSnorkle Install: Another option for keeping quiet, by shrubitup
o YZ250 Pipe Dimensions, Stock, HGS, and DEP : Discussion about cone shapes and lengths, with a downloadable PDF of the pipes laid out, by BRM.[/indent]
Transmission
[indent]o WR 3rd thru 5th in a YZ250: A how-to for putting wide ratio gears in your YZ250
o WR tranny : 1st Gear Case Grinding: Clearancing for for full WR 1-5th install in YZ250
o Replace Your Shift Stopper! : Updating 05 & 06 YZ125 shift stopper with more reliable 07 part[/indent]
Suspension
[indent]o How Your Suspension Works : Short explanation of the basics of different suspension parts and their functions
o How To Tune Your Suspension : Some basics on how to properly dial in your bike, not just blindly cranking adjusters
o Updated KYB Shock Rebuild Procedure : Step by step instructions for rebuilding / bleeding KYB shocks
o KYB Free Piston Mod Procedure : Instructions for drilling KYB free piston for longevity and performance (05+). Includes assembly bleeding instructions for all twin chamber KYB’s which should be used when changing fluids
o Post Your Suspension Setup : Clicker settings, spring weights, etc, used by members here on their YZ’s [/indent]
Chassis
[indent]o Aluminum Frame Swap: mxjosh swaps frames & his measures frame weight difference
o Lowering 2 Stroke Radiators : Using 4 stroke radiator lowering kits on your YZ250 (should work for YZ125 as well)
o Honda Front Brakes: Changing to Honda parts for improved braking
o OEM Yamaha Footpeg Options: Swapping pegs from other bikes[/indent]
Miscellaneous
[indent]• Undertanding Yamaha Part Numbers : Guide to part numbers and what they mean
• Which Aftermarket Tank? Opinions on IMS vs Clarke vs Acerbis vs Zip Ty
• Trimming Side Panels: A sleeker look for late model YZ’s
• Let’s See The YZ’s : Two stroke picture-only thread
• Let’s See Your YZ’s In Action : Picture / video thread of two strokes tearing it up
• Factory Service Manuals : A wealth of downloadable info, everyone should have a service manual with their bike!
• Thumpertalk’s Own HOW-TO Section: Loads of great write ups
• How-to Videos From Rockymountain ATV: From changing a tire to rebuilding a bottom end, if you need a little extra confidence or just want to learn, check these videos out![/indent]
