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Maintenance

DIRTY FILTERS: MR. KNOW-IT-ALL

NO FILTER Dear Mr. Know-It-All, I’m an old guy (60-plus years old) and still am an avid rider. I ride a 2016 Husky FE350. I’m religious with the maintenance of the machine. My question relates to air filters. Several years ago, I started using No Toil cleaner and oils, as I thought the solvents were […]

THERE SHE BLOWS AGAIN: MR. KNOW-IT-ALL

NO TOLERANCE Dear Mr. Know-It-All, Hello, sir, I have a 2002 KX85 that I rebuilt top to bottom this winter that is having an issue. A previous owner sleeved it 0.5mm overbore, and the only piston kit I found was a forged Wiseco. I heard that the thermal expansion rates could be an issue, especially […]

MR. KNOW-IT-ALL: LUBE HER UP

WHICH LUBE IS BEST? Dear Mr. Know-It-All, I have a 5-year-old KTM 250XC and flat worship this machine. I’m religious about oil changes, filter cleaning—basically all maintenance—since I want this sucker to last. My question is, should I run a special oil in the transmission or is a good four-stroke oil fine? Synthetic or a […]

2002 HONDA CR250R 2-STROKE PROJECT: BEHIND THE BUILD

The Honda CR250R has got to be one of the most popular early-to-mid-2000s two-stroke machines to rebuild in history. One reason is that Honda sold a ton, and the other reason is the bikes all seem to be aging very well. We found what looked like a very clean machine on the used-bike market, slapped […]

ONE WITH NATURE, USED BIKE STYLE: MR. KNOW-IT-ALL

UNEXPECTED GROWTH Dear Mr. Know-It-All, In regards to your response to Mr. Tonks’ question concerning used-bike fitness, I would suggest there are other factors one must consider in the era of ESG and related issues surrounding sustainability. Your readers should be careful to check for broader environmental risks, as once it is determined that Mother […]

STEERING FIX: MR. KNOW-IT-ALL

GET GREASED UP Dear Mr. Know-It-All, My 2019 KTM 300XC-W turns like it has a steering stabilizer. Only problem is, I don’t have one on there. Why does my steering feel like cement all of a sudden? I’m having trouble controlling my bike. Should I take it back to the dealer? Miles via mrknowitall@hi-torque.com I’m […]

TPI 2-STROKE OILS: MR. KNOW-IT-ALL

TEXAS TEA Dear Mr. Know-It-All, What is the best oil to run in the current TPI machines? I just purchased a 2021 Husqvarna TE250 and want the machine to go the distance. Ryan Chef via mrknowitall@hi-torque.com Although the current models are oil injected, eliminating the hassle of pre-mixing and the two-stroke-muffler drool, there are still […]

DIRTY FUEL: MR. KNOW-IT-ALL

GREEN SPOOGE Dear Mr. Know-It-All, I’ve cleaned the carburetor and flushed the tank on my kid’s 2002 TT-R125L at least a dozen times, but I continue to get green debris in the jets. The bike had been sitting for years. Where is all this nonsense coming from? Josh via mrknowitall@hi-torque.com Josh, Josh, Josh, use that […]

BIKE STANDS VS. CENTER CASES: MR. KNOW-IT-ALL

ROCK THE CRADLE Dear Mr. Know-It-All, I have been an off-and-on subscriber to Dirt Bike Magazine since 1982. I have a new Suzuki DR-Z125L. Since that bike has no full cradle, it uses the engine case as part of the cradle, much like the old Honda XR80 or the new Yamaha TT-R125. Is it okay […]

WHY SO MANY THROTTLE CABLES? MR. KNOW-IT-ALL

Dear Mr. Know-It-All, Why do TPI bikes come with two throttle cables? I’m starting to see aftermarket kits converting them back to a single cable. My specific bike is a 2021 KTM 300XC-W TPI. Steve Baum via mrknowitall@hi-torque.com   It’s a safety system in case the spring on the throttle body fails. The second “push” […]

PEG ADJUSTMENT: MR. KNOW-IT-ALL

HIGH OR LOW? Dear Mr. Know-It-All, I am installing some Fastway Evolution pegs on my machine and am wondering which position to put the pegs in? The collar provided allows you to run them either in the stock position or a lower position. Have you had any experience with this? Marv Stuller via mrknowitall@hi-torque.com This […]

COOLANT LEAKAGE: MR. KNOW-IT-ALL

DRIPPAGE Dear Mr. Know-It-All, My 2002 CR250R is dripping coolant from this tiny hole under the water pump. What on earth is this hole, and how do I go about fixing this? Max Sheldon via mrknowitall@hi-torque.com That little orifice is a weep hole. It’s a sort of safety valve alerting you that your seals and […]

USED BIKE CHECKLIST: MR. KNOW-IT-ALL

CHECKLIST Dear Mr. Know-It-All, I’m going to look at a 2003 CR250R. The bike looks fairly clean, and the owner says the engine has never been rebuilt. What are some things I should look for to ensure I’m not buying into a mechanical nightmare? Herby Tonks via mrknowitall@hi-torque.com Great query, Mr. Tonks. Used two-strokes are […]

INJECTOR CARE: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I’m doing a top end on my 2021 KTM 300XCW and was wondering if I have to remove the injectors from the cylinder to slide the cylinder off? Ron Hector via mrknowitall@hi-torque.com Removal of the injectors is not necessary to remove the cylinder. Just unplug them, noting which plug goes to which […]

KTM STEERING-HEAD BEARNINGS: MR. KNOW-IT-ALL

STEERING CLEAR OF DRAMA Dear Mr. Know-It-All, I think I have a touch of play in my steering stem. I can hear it click when I’m just rocking back and forth. My bike is a 2018 KTM 450XC. It has fewer than 30 hours and was never abused. Do you think I’m in need of […]

TWO-STROKE WARM UP: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, With the overload of “expert information” available for the proper warm-up technique for my 2020 KTM 300XC TPI, I wanted to go directly to the source of true knowledge to ensure I am doing it correctly. Currently, if the temperature is below 50 degrees, I pull the cold-start knob and allow it […]

BETA SHOCK BODY: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, My 2021 Beta 250RR Race Edition’s rear shock literally came apart at the top of the shock body. I notice there is a seam where it broke. All of the oil had blown out of it in the process. What could have caused this? Harvey Monatt via mrknowitall@hi-torque.com This is an unusual […]

SUSPENSION TUNING: MR. KNOW-IT-ALL

TINY DANCER Dear Mr. Know-It-All, I have a ’20 KTM 300XC, and because of my size (240 pounds), I went to a much stiffer rear spring. My problem is that now it returns way too fast. I added rebound damping to slow it down, and all it seemed to do was wreck the feel in […]

SAVE THAT PIPE! MR. KNOW-IT-ALL

HITTING THE PIPE Dear Mr. Know-It-All, I’m an off-road guy and ride a Husky smoker. It’s a little weathered but hauls my carcass through the woods just fine. On a recent ride, it started running poorly, and when I finally stopped, I noticed a slight issue with the exhaust pipe. I must have caught it […]

DROP-OFF TECHNIQUE: MR KNOW-IT-ALL

Dear Mr. Know-It-All, Waterfalls and drops scare the daylights out of me. My kids ride down them like nothing, but I resort to bull-dogging most of the time. I have more confidence to ride up them rather than down. Any pointers for a washed-up geezer looking to keep up with his kids? “Old and slow” […]