Oil to Gas - First, Make It Last

Nitrous - What's Funny About Laughing Gas

Leakdown - Bubble Trouble

Jetting 101 - Every Race Is Won

Power Players - 250R's Can Be Slayers

Oval Boring - The Hole's Not The Same

Boring - The Hole Story

Blaster Limit - T.O.R.S. - Available On Yours

Pipe to Port - Altered "Tinking"

Dial A Jet - New Tech = New Attempt

Porting 101 - Start The Fun

Porting 102 - To Choose To Do

Porting 103 - Listen To Everything

Porting 104 - Time The Roar

Porting 105 - To Grow Flow

It's Your Turn - To Screw

Master The Blaster - 2 Wheels Is The Deal

Chain - Power Loss So Plain

Shocks Pass Gas - Nitrogen Is So Cool

Doing Launch - Pressure Testing

Drag Anyone? - What To Displace

Spark - Gap That Matters

Polishing Things - Shiny Parts Look So Fast

TRX Cranks - Canned Cranks Strapped Tanks

EGT - Start To Believe

Flywheel - Less Weight = Less Wait

Bore & Stroke - How Much To Smoke

CV - Constant Controversy

Blaster Disaster - Base Blow Out

To Pipe - To Know Is To Start

LT's If You Please - Rich Sound Moves Ground

New Looks - Metal Stress Is Weakness

Strength In Length - Power Makers Shift Rearward

Raunchy Banshee - Porting Not Sporting

AMP Link - Friction Stinks

Boost Juice - No Boost Makes Big Roost

RAD Valve - Equal Air Seems Fair

Intake Size - Larger Isn't Always Wise

Crank Threads - Right (way) To Tighten

Moving Matter - No Vibration Exemption

Power Pistons - Trimming Domes Makes HP Shown

Blaster Roots - Water Cooling, No Fooling

Raider Sport Ports - Let The Power Out

GP760 Value Added - Very Revvy

Water Testing - Flat Water = Fast Facts

Weight - No Free Freight

It's No Flow Show - Testing Resting?

Sand Tires - Slippery Traction; Lose Patience, Action

Dark Spark - Stubborn Blubber Marks Start

Missing Thunder - Friction Losses; No Wonder

YZ Activity - Wanted: More Upper Energy

Engine Swaps - Replacement Displacement

YFSYZ - Not For Everybody

Thinking/Planning - Choosing Wisely Not Uncanny

Algodones To Glamis Via TRX - A Fast Ride While Riding High Tide

Tree Huggers & MTBE - How Many Degrees Does It Take To Ruin Everything - Update 9/20/2004 - Response added

Faster Blaster - The Long Lean Run From The Border

LT Marries RZ - The RZ & Not Enough Money

Pismo River - The House Of Pain

Tools Rules - Keep The Clicker From Getting Sicker

500 cc GP - Road Racers Relieved

Baby Baby - Eyewear Filter Elements

Lap It - Make That Flat

Long Rod - How Much To Dwell

Hot Dodge - Melted Me

No Air - The Proper Use Of A Chair

Changing Parts - No Wasting Smarts

Balance Shafts - Loose Gears Hurt Ears

 

 

The Thread Spread - Revisited

_______________________________________


-It's Your Turn-


To Screw

The question - After installing Motion Pro twist throttle, my Blaster doesn't run like it use too. It cuts out on top end, more so from 4th gear on to 6th. Please bear with me on the following stupid questions. I put in a new plug "gaped" checked the air filter "brand new" and fooled with the idle adjustment. I also tried the air mixture screw. Now the dumb questions, 1 and a half turns is what the manual tells is right. That's one complete turn 360 deg.+180 correct? Also does more turns out lean the mixture? I don't want to fry the motor. Next "more jetting questions" Its 34 degrees out side could that be it? Don't worry I have a friend who's very capable of helping me with this, but I'm trying to wean my self from having to run to him every time I foul a plug.

The response - Correct. and no that's not dumb, I have to think about it too. Out is richer. Unless the carbs really messed up, you won't fry it with the air mixture screw. I have no experience with riding in low temps. Does not get that cold here except during a few nights a year. Now if you want to talk 117, can do. I don't have the owners manual on right now, but I think a jetting change is in order. The real question is if the twist is causing your problem. Did it work fine is the same weather conditions with the thumb?

 

YFS200

 

 

 

I don't know what carbs on that quad, but generally the low speed mixture screw is an air screw not a fuel screw. That means when you turn out the screw you are letting more air past the screw which makes the mixture leaner.


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Your 34° temp is packing more air and must be compensated for by making the mixture richer - since you have more air you need more fuel - even though the fuel is more dense too. Start by lowering the clip to raise the needle which will richen up the midrange. Take it one position at a time. You may have to jet richer on top too. Make changes to the main jet in small increments. Usually 2 - 3 sizes would be about right for that kind of temp.

 

Rick

 



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