ASK THE MXPERTS: 2007 HONDA CR250 TWO-STROKE QUESTIONS
The CR250 was a storied machine, from Steve McQueen to Rick Johnson to Johnny O’Mara to Jermy McGrath, it was omnipotent—2007 was its last hurrah
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The CR250 was a storied machine, from Steve McQueen to Rick Johnson to Johnny O’Mara to Jermy McGrath, it was omnipotent—2007 was its last hurrah
“My spring has two pink marks on the shock spring. According to the manual, this means a 5.5-rate, unequal pitch, steel spring.” Wrong!
The Yamaha YZ250GF gearbox ratios are always in the owner’s manual
Whenever a part fails on a new motorcycle, the company rep always tell us, “That’s never happened before.”
The weak link in any motocross racers life is the sudden arrival of a oil gusher…coming from your forks
Riders in the past never came into the pits after a moto and screamed that they needed to change their fork springs—and air pressure is just a fork spring
Well, actually it is a melting kind of thing and a lost art in the motocross world. You can get more life out of old rubber with a tire groover
Two-stroke fuel injection only uses the throttle body to meter the amount of air, the fuel is injected into the engine at the transfer ports.
Lock-on or bolt-on? It is a conundrum that come down to convenience versus comfort and complexity versus simplicity
Have you ever heard of the “”AMA Four-Stroke Exemption Rule?” Well, you can forget it1
There are two kinds of automatic transmission fluid—one was home brewed fix for a slipping clutch, the other made your clutch slip
Either term could be used when describing an engine’s torque without being incorrect, but one is actually correct
You can buy a complete kit in a variety of displacements or simply bore your existing cylinder and have it replated
When are motocross bikes going to get fly-by-wire throttles? Let’s hope that never happens
Bob dropped this gem on us. “Give me a lever long enough and a fulcrum on which to place it, and I shall move the world.” We didn’t know that Greek mathematician Archimedes had ever raced
The 2009 Kawasaki KX450F had the makings of a great bike, but in the wrong order.
A slipper clutch disengages the clutch when you chop the throttle, but you still have to pull the clutch in to start, shift or stop. Conversely, an auto-clutch frees the rider from ever having to touch the clutch lever.
Since there is nothing to push against when up in the air, how can rider change an upward or downward arc?
I saw saw the factory mechanics inspecting the clutches after every moto. What are they looking at?
“My 2020 Husqvarna FC350’s plastic subframe cracked on the bottom mounting hole.”
Was surprised to read in an MXA test that Husqvarna makes guns. Is that true?
The most important thing abut black scuff marks on your bike’s plastic is to get them off as soon as possible
Is the 2020 Kawasaki KX250 too stiff for the typical 250 four-stroke racer?
“I’ve been looking at getting a newer bike. I’m thinking about the KTM 350SXF, a newer YZ250 or a KTM 250SX two-stroke”
We don’t, but we do hate their business practices, dictatorial rule, unwillingness to pay purse money, third-world venues and very flexible rule book
To set preload, turn the 35mm preload adjuster on top of the fork cap counterclockwise as far as it will go — each full clockwise turn is 1mm of preload
Racers and factory teams have been drilling holes in airboxes since 1966 and suddenly you think that KTM and Husqvarna have pushed it too far. Stop it!
Do you think the 2020 KTM 125SX might pump out the same horsepower as my YZ134?
Don’t think that the only choice in engine design is four or five valves, there have been lots of two-valve heads and even three valve heads
The twists and turns started with the “CZ snake pipe” in the early 1970s, but the need to weave has not subsided to this day