2005 KTM 125 SX — KTM 250 SX Motocrossers — Test Ride — Review…

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KTM 125 Race Concept
KTM 125 Race Concept

2005 KTM 125 SX — KTM 250 SX Motocrossers – Ride — Review – Rider

Tuesday, February 24,

Many times when a has a great engine, it changes it for the model year anyway, and that insistence on change the factory hard. KTM two-… had gnarly motors in 2004, so the company kept motor to a minimum. Instead, it spent its R-D and budget working out a new frame and

The orange engineers found the center part of the 2004 was able to twist under a so vastly larger oval make up the new frame from the pivot area to the upper mount. That mount has moved inboard, so the reservoir no rubs the rider’s boot. KTM made major strides the fork, tracing some harshness to the shape and construction of the and outer fork tubes.

changes to the tubes and the bushing result in much smoother KTM claims it can use three times valve shims than in ’04 and have smoother action. the frame and solving the inherent issues made the job of shock a much easier one. We KTM’s suspension made a jump forward from the to the ’04 models, but the leap to ’05 is even

The changes affect every model, so the entire KTM lineup have suspension and handling equal to the 125 and 250 SX we tested. 250 SX Motor

KTM did make significant updates to the 250 SX but it wasn’t looking for additional rather it wanted to train the it had. This is the third for the current engine design. It off the drawing board a fire-breather, gigantic power output. The ’03 was positive that you can have too of a good thing.

The ’04 had much manners, but KTM still felt it was a idea to add a heavier crank and the compression. Even the two-ring should extend ring intended to make the bike to ride. This latest-generation specification also required carburetor jetting.

All of the changes are to make the engine stronger low as well as more tractable.For the heat wave we endured testing, KTM leaned out the jetting the optional jets that with the bike. The stock 42 jet was replaced with a 40, the NOZF with an NOZG (both the clip in the fourth position) and the 168 jet with a 165. With jetting, the engine ran cleanly and was from right off idle.

Naturally, the engine hits in the middle-rpm range and still like a monster on top—a few felt it accelerated harder a 450 four-…! The nice thing the ’05 is that you can ride with the under the gun and still giggle a maniac at the acceleration, or ride in mode at smaller throttle and lower rpm and have it still smoothly but tamely.

For instance, we clear a big tabletop at I-5MX in the Hungry Valley State Recreation Area in Gorman, in either third or fourth That’s a pretty flexible As with any two-…, the KTM likes a or sandy track better a hard and slick one, but the wet weight, snappy power and overall feel ensure the remains competitive regardless of the line you are on.

KTM has taken unprecedented to make sure you can dial in suited to your style and conditions. The power-valve governor has a spring, with a small inside a larger one. The is delivered with a medium spring installed, but it comes a lighter and a stiffer spring in the kit. We tried all three, and we the lightest spring. As if that enough, the preload on the power-valve is externally adjustable.

Going in one turn delays the power-valve 250 rpm. We added one-half of preload with the light shifting is very precise, and the clutch is awesomely easy to while offering instant and feedback. KTM also changed the factor on the crank, so the engine a bit smoother running, too.As the 125, we felt no need to around the triple clamps to the steering.

Our bike was cooperative when the wanted the inside line. are easy, and the bike isn’t picky about jump It is easy to control in the air.

packed and pounded clay were OK. KTMs can come a variety of Bridgestone tires, and our wore an M59/M70 sand/mud-oriented set worked great when the conditions were soft but affected our commitment to turning on faces once the ground got Chassis Changes

The 250 SX received the chassis and suspension changes as the 125 SX, means it feels more and precise on the track. As with the the 250′s shock shaft is to flow oil differently, since WP to try to keep the two pistons in the shock separately. Ideally, the second should be effective only in the shock ….

All shock are speed sensitive, meaning resist fast movement than slow movement; but the idea of the PDS shock, with its setup, is also to make the position sensitive. By using the piston, it gets much late in the …, so the bike can without having a linkage. year KTM and WP get the concept worked out We changed little on the 250, it absorbed the bumps well yet had improved bottoming resistance.

We our eye on the sag (110mm), and at I-5MX we upped the compression for heavier riders. and light riders tended to the settings returned to stock, is a pleasant change for KTM.In the riders accustomed to the suspension of Japanese bikes have KTM’s PDS system a little The ’05s don’t require odd other than 10mm sag than most Japanese

Even when you have a with a linkage, there are two of measuring sag. Getting the sag number with the rider on the is always important, but you should how much sag the bike has with its own Around 25mm is normal for bikes; the KTM likes a little Otherwise, you adjust the KTM as you would any modern motocrosser, and for us stock was than ever.

Two-strokes have a lot of appeal, and a super-strong that has a proven record of and is exceptionally easy to care for is more appealing. 125 SX Motor

KTM has been serious about motocross, and this dedication has in the 125 SX for several years now. In KTM was rewarded with first and in the 125cc Nationals—the first championship for a European machine. the lessons learned through and testing make an almost transition to KTM production, and the changes put in for ’05 have resulted in a greatly orange machine.

As far as the engine is KTM left a good thing much alone. It was the most-powerful 125 of (Jan. ’04), and we expect to be true in 2005. The new exhaust sparked up the response and allows the to pull longer before flat on top.

The crankcase is strengthened, but that change was for 200cc model reliability, as it deal with a higher load. The 200 SX is no longer in the lineup, but the EXC always, the Katoom comes a tool kit and extra jets. Our had a 45 pilot, a 1469G needle the clip in the second position the top and a 190 main jet. All of those were supplied with the which is a nice touch.

those jets installed temperatures of 90 degrees or more) the 125 SX effortlessly and carburetes very As with most modern it likes a little fine-tuning the air screw for tracks at different We shot the photos at Joe Sutter’s track only a few feet sea level, then went to the next day, which is than a 3000-foot elevation

We ended up going out one-half on the air screw and turning the idle up a bit at beauty of the 125 SX engine is the midrange. It has horsepower numbers above those of the four-strokes, but the ripping, midrange separates it from the 125s. You never hear the KTM bogged in a berm. You touch the self-adjusting hydraulic clutch, and the has the boost it needs.

Through the first three the engine is ultrastrong, and it pulls from gear to gear. On uphill runs, though, is a noticeable gap from third to gear. Otherwise, the KTM is as good as a two-… gets.The amazing is the KTM produces this kind of yet seems oblivious to pump and the top end will last most riders at least a year! Changes

While we are fine mere refinements of the engine, we happy to see such far-reaching alterations. It wasn’t so much the ’04 model was bad but that it had enough of a feel that the bike in a shootout situation in which were jumping from one to another. KTM’s testing weaknesses it was able to rectify. By flex in the frame, and equalizing the in the fork tubes, KTM ended up much happier suspension and

The tube change and the other upgrades have resulted in action as well as better resistance. We felt little to play with fork Even landing flat no problems and passed little to our hands.

I-5MX has a downhill section with choppy before a jump that the suspension pretty hard; the got a little busy there, but we want to stiffen it up since it the other jump faces and bumps on the track. The rear hit a hard in G-out dips, so we in one-quarter turn on the high-speed

After that, we could the dips without feeling the through our boots.With the suspension in and the sag set to 110mm, the eighth-liter SX has excellent It will grab the tiniest and rail through a turn. Our had the triple clamps set in the 20mm same as in ’04—but the ’05 clamps the owner to remove the steering from the stock clamps and it to have 18mm-offset clamps.

ridden with the 18mm and that definitely gives you trust in the front end and lets you lines with no real thought. Some riders the bike gets a little at speed, though, so it’s a thing KTM lets you choose.We feel any need to change the since the bike handled jumped easily and landed

KTM 125 Race Concept
KTM 125 Race Concept

We did have some busyness on chop, and the rear was a little in hardpack ruts with chop.Overall, the 125 SX is a fine motocrosser vastly improved suspension, a and -accurate feel to the chassis and the production brakes we’ve We haven’t seen another two-… that will you a better chance on the start you have to run with 250cc Opinions

250 SX

Even though I been spending most of my on 250cc four-strokes lately, I was to jump right on the KTM 250 SX and go fast. We the sag before I rode the bike, but the still felt a bit high, so I had turn taken off the spring. the bike settled on the straights and dive when I was braking for I could grab the tiniest ruts, too.

I swear bike feels faster the 450cc four-… I’ve I helped test the power-valve and I liked the lightest one the best. I race this bike had a lot of fun on it.

Cameron Heisser/5’10″/155 lb/Intermediate no secret I am a four-… fan, but is one fun two-…. I found it a little on packed and slippery tracks, but it is a blast when there is loam to the track surface. I was to get the suspension working fine for me, but I it could have been with one step up in rear-shock rate for my weight.

KTM sent me one of its seats, and while I didn’t feel it was critical, it did make the to standing easier. Most the added cushion improved the of the rear suspension out of choppy turns. This is one two-… I’d to have around.

It is powerful, skinny and easier than to ride.

Karel Kramer/6’1″/200 125 SX

I have many hours in the of a 2004 KTM 125 SX. Every time I one I am so impressed by how much faster it is any other 125cc two-…. the fact that KTM made small changes, the ’05 125 SX is a lot faster the ’04 model; it’s even of a rocket ship than it was year.

The suspension has also been for the better. It feels much plush and is smoother over big and bumps. Really, any way you look at it, the has the complete package.

If you are in the market for a 125 you won’t find a better one the KTM.

Sean Friday/5’5″/120 The KTM 125 SX has always been the powerhouse in the 125 The 2005 is no different: On the track it really fast, and I love the smooth power it has. The characteristics are really rider-friendly, and I found myself searching for

The jetting was spot-on, and the KTM never a beat. The new WP suspension worked than last year’s but it still gave me a nervous I had a hard time getting the turned on flat, hard-packed as the front end never seemed to

I softened up the fork a few clicks, seemed to help, but I still had a time getting it to turn anything to use as banking. The shock OK, but it seemed to blow through the in rough conditions. Overall, I the 125 SX is a decent bike; I just it still requires much setup time than any of the bikes.

If you can get the setup right on the then you’ll have a for sure.

Corey Neuer/5’11″/165

More 250 two-… motocross tests:

KTM 125 Race Concept
KTM 125 Race Concept
KTM 125 Race Concept
KTM 125 Race Concept
KTM 125 Race Concept

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