ASK THE MXPERTS: MOTOCROSS PREMIX RATIOS

I'm Afraid Of Seizing My Engine, Can I Run 12:1 Pre-Mix In My Bike Instead of 40:1?

Dear MXA,
Can you seize a Yamaha YZ125 from running 12:1 oil mix at piston break-in. Wouldn’t this make it too rich to seize?

No. It would make it too lean. Too much oil in the mixture is as bad as not enough oil. The excessive oil displaces the gasoline, which counter-intuitively leans the mixture (it’s lean it because there is virtually no gasoline in the fuel mixture). The bike seizes because it does not get the cooling effect of a fresh charge of gasoline with each stroke.

SUBSCRIBE NOW & SAVE:

- Print Magazine
- Digital Magazine

Related News Records

- MOTOCROSS ACTION WEEKEND NEWS ROUND-UP: IF YOU AREN'T TOO TIRED FROM STAYING UP ALL NIGHT WAITING FOR MOTO 2 TO AIR

- MOTOCROSS GRAND PRIX OF DRIZZLE: THE MUDMEISTERS DEFEAT THE SAND MASTERS IN GOOEY BRAZIL

- HANGTOWN 250/450 NATIONAL VIDEO: SEE EVERYTHING YOU NEED TO KNOW IN EXACTLY FOUR MINUTES AND 30 SECONDS

- REM GLEN HELEN MOTOCROSS REPORT: THE GHOST OF THE INFAMOUS “MUDDY STRAIGHT” RETURNS

- COMPLETE HANGTOWN 250/450 RESULTS: STEWIE, DUNGEY & ALESSI GO 1-2-3 IN THE 450s, WHILE BAGGETT DOUBLES UP IN THE 250 CLASS

Subscribe to MXA's News Feed

ON SALE

MORE STUFF

Local Guides

- All Local Guides
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- DC
- Delaware
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- Nevada
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming

	Dirt Bike	Dirt Wheels	ATV Action	MBA	RBA	BMX PLUS!
Copyright Hi-Torque Publications, Inc. All rights reserved. motocross news -motocross bike test - motocross features -motocross product reviews -motocross photos motocross videos Honda MX Tests - Husqvarna MX Test - Kawasaki MX Tests - KTM MX Tests - Suzuki MX Tests - Yamaha MX Tests WARNING: Much of the action depicted in this magazine is potentially dangerous. Virtually all of the riders seen in our photos are experienced experts or professionals. Do not attempt to duplicate any stunts that are beyond your own capabilities. Always wear the appropriate safety gear.