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Maintenance

NEGATIVE FORK PRESSURE: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I made an interesting mistake and require your insightful knowledge. As usual, the night before my ride, I load my bike into my truck. I use a fork brace and tie down the front end, then purge the air from the fork with my quick release. During last week’s moto ride, the […]

KDX CLUTCH WOES: MR. KNOW-IT-ALL

CHATTER Dear Mr. Know-It-All, I was riding my 2002 KDX 200R the other day, and upon pulling in the clutch, the bike started releasing a disturbing chattering noise. It was only when the clutch was being pulled in. It got progressively louder as I rode home. What on earth could be making this noise? Rich […]

THERMOSTAT, IN OR OUT? MR. KNOW-IT-ALL

SO COOL Dear Mr. Know-It-All, I recently picked up a 2019 KTM 300XC-W and had a question regarding the thermostat: run it or replace it with a straight-through hose kit? Vern Hatch via mrknowitall@hi-torque.com To be quite honest, Vern, we have had no issues with our long-term KTM TPI machines, which are running the thermostat. […]

ROGER DECOSTER’S 10 GOLDEN RULES OF MX

Roger DeCoster has mentored more motocross champions than any man in history. His own racing record is incredible. Beyond his five  500cc World Motocross Championships, he was a member of more winning Motocross des Nations teams than any rider, of any country. Then he led the U.S. team to a record string of des Nations […]

SET-UP CHOICES: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I am an aging rider that is primarily riding off-road now on my 2004 YZ250 two-smoker. I had my suspension set up for motocross from Pro Circuit in my younger, more energetic days. I absolutely love the suspension, especially when I am on the gas through the rough stuff; it’s amazing. Now […]

KTM STAND MYSTERY: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I have a 2020 FC450. Husqvarna supplied a side stand that has four small clips on the front. I figured those clips were to attach the side stand to the bike while pushing it around, like hanging a T-stand on a footpeg; however, the clips don’t really fit anything obvious. So, what […]

KTM TPI BOG: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I’m having grief with my 2021 KTM 300XC. For no apparent reason, it started bogging and running a bit rough at all throttle openings. I’ve changed the inline fuel filter and cleaned the air filter. Not having a carb to clean, I don’t know where else to start. Please help! Lyle Durst […]

KX125 SERVICE: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, I pulled my 2005 KX125 out of retirement the other day and decided to give it a once-over. After cleaning the carb, I noticed an air boot full of blue goop. Low and behold, I pulled the air filter, and the bottom of the filter was all pooled up with oil. I […]

BETA AXLE BLOCKS: MR. KNOW-IT-ALL

Dear Mr. Know-It-All, My left-side axle block keeps coming loose on my 2021 Beta 250RR Race Edition and is also doing so on my buddy’s 300RR. I see it’s threaded but am worried, as it’s egg-shaped now from being loose and I don’t want to strip it. Any thoughts? Jeff Monatt via mrknowitall@hi-torque.com I spent […]

FASTWAY SPARK ARRESTOR: PRODUCT REVIEW

PRODUCT: The Fastway spark arrestor end cap is designed as an efficient way to convert your stock muffler into a USFS-approved spark-arrested muffler. It replaces the production end cap and comes with a 6061 machined end cap that houses a legal spark arrestor screen and the removable down-turned nozzle where the exhaust exits. When the […]

MR. KNOW-IT-ALL: VINTAGE CLUTCH PLATES

CLUTCH DRAMA Dear Mr. Know-It-All, I recently purchased a 1984 YZ125G off of Craigslist. The first time I rode it, I realized the clutch did not work. I replaced the clutch cable, but that did not work. After tearing apart the clutch, I realized the whole clutch needed to be replaced. After searching many websites, […]

MR. KNOW-IT-ALL: HANDLEBAR SPACE

A LACK OF REAL ESTATE Dear Mr. Know-It-All, I have a 2019 KTM 300 TPI machine and just spent the last hour and a half fitting a set of Renthal Twin Walls on my bike…only to discover there’s not enough room on the handlebars to fit the throttle, front brake perch, clutch perch, electric-start button, […]

MR. KNOW-IT-ALL: TRIALS BIKE LINKAGE

GET YOUR BEARINGS Dear Mr. Know-It-All, When I lift my Beta Evo trials bike onto the stand, I feel a bit of play somewhere in the rear end. I’ve checked all the fasteners, but there is still something loose. I don’t want to risk cracking anything. What can I do to eliminate this? Bob Grode […]

CHAIN REPLACEMENT: MR. KNOW-IT-ALL

CHAINED AND GAGGED Dear Mr. Know-It-All, I require your wisdom. I ride a YZ250 two-smoker, primarily off-road but occasionally on an MX track. I was taught that I should only change my chain and sprockets all at the same time, and that it is not good to change one piece only. Is that true? I […]

RIDING ROCKS: MR. KNOW-IT-ALL

ROCK AND ROLL Dear Mr. Know-It-All, I can’t seem to figure out how to ride through rock gardens that are basically fields of loose boulders. Each time I attempt one, the bike just deflects and flounders beneath me, which makes me dab my feet. I am standing up when doing so, but once I lose […]

BOILING FUEL: MR. KNOW-IT-ALL

BOILING UP Dear Mr. Know-It-All, I hope all has been well with you. I have a 2020 KTM 690 Enduro R that I use for light adventure touring and moto camping. With a stock 3.5-gallon tank, I knew I would either need to carry fuel or add an auxiliary tank to avoid having to tank […]

KTM 300 TROUBLESHOOT: MR. KNOW-IT-ALL

WHAT A KOOK! Dear Mr. Know-It-All, I was in the middle of a rather large race last weekend, and midway through, my 2021 KTM 300XC started running like somebody stuffed a softball in the intake and wouldn’t idle or rev out. Upon trying to diagnose a few key areas, like spark, compression and the inline […]

KTM E-STARTER SERVICE: MR. KNOW-IT-ALL

SQUEAL LIKE A PIG Dear Mr. Know-It-All, I have a 2020 KTM 250XC TPI. Love the bike, really happy with it, but when I start it after it has cooled down, it makes a horrible squeal for a few seconds after the motor fires (electric start). This noise first appeared at about 15 hours. It […]

FAT TIRES: MR. KNOW-IT-ALL

DEs’ SETTINGS Dear Mr. Know-It-All, I’m setting my 2014 300 up for desert racing and have a question about tires. To help in the high-speed sand washes, I’m thinking about switching to a Fatty front tire with a mousse. Is one brand better than the other in this tire size? John Bummer Via mrknowitall@hi-torque.com Frankly, […]

DR350 REPLACEMENT: MR. KNOW-IT-ALL

RANDOMLY BIZARRE Dear Mr. Know-It-All, Now I am ready for an all-new motorcycle. One I can buy and not fix it. I just want to ride it tuned to me—sag, tire pressure, fork oil, seat grip and handlebars, actual pull on the pipe and off, etc. I live in the Arizona desert, with two OHV […]