2017 alta redshift mx9/7/2023 ![]() Both compression/rebound on the fork and hi/lo compression and rebound in the shock - all turned all the way in. The bad news is that I also had to max out all the five suspension clickers. Not too stiff, and not as soft as before. The good news is that the choice of springs was correct for me and my riding skill level (200 lbs, Intermediate). There are good news and there are bad news. Ok, I have things to report back after my first MX track day. Last thought: I cannot understand why people do not care about the decimal point in spring rate specs? For pete's sake, MXA and MX-Tech, 4.9 N/mm is NOT the same as 5.0 kg/mm! Race Tech has figured it out though, it appears. So, please check my spreadsheet and let me know what you think. They can't match the same 35/100mm rule of thumb rear sag numbers either. I wonder if there are some suspension gurus here who have experience with re-springing bikes that are much heavier, much lighter, or have a much stiffer suspension, like the pro bikes. ![]() I can make a reasonable static sag, or race sag, but NOT BOTH. The static and race sag numbers will not match the traditional specs. I have to stiffen the springs proportionately to the original specs, approximately the same percentage front and rear. There is no other way to fix this but to stiffen the springs. This is why it wallows, squats, pitches and bottoms out so much! The bike itself has a lot of inertia, including the pitch inertia. However, when the springs rates are compared to just the weight of the naked bike, they are 6% SOFTER. The static sags were a little larger, showing that the stock Alta is sprung 1% stiffer than my well-tuned Husky, when adjusted for its weight + the weight of the rider. Here is the kicker: The race sags are the same or less than on my 2-stroke Husky! The Alta suspension engineers must have copied the 2014 KTM and increased the spring rates proportionately to the weight of the bike + the weight of the rider. So I bought the Motool Slacker digital sag scale and measured the sags accurately. The Alta has much stiffer springs than all my other MX bikes, including the YZ450F! The stock springs are 0.52 kg/mm front and is 6.3 kg/mm rear. But they are NOT, according to the manufacturer. ![]() I initially thought the springs were much softer than on my Husky. And some magazines and YouTube videos are also saying that the Alta Redshift MX is sprung too soft. I noticed this when riding two other Altas as well. Lots of slow but very significant acceleration squat and brake dive. Compresses the suspension almost fully on even small jumps. I can easily tell, the bike is very well controlled but feels wallowy, slow to respond to large road bumps, whoops, etc. And it is not the damping but the springs that feel soft. ![]() Alta spec'ed an excellent valving, this 4CS works! The bike is very nicely balanced too.īut it feels way too soft for motocross. Same 4CS fork, same shock, and same linkage and motion ratios. The suspension is exactly the same as on my Husky. It weighs 260 lbs, but without a heavy flywheel if feels very light, I swear, not any heavier than my 2015 Husky 250TC 2-stroke. It has a ton of traction, a lot of instant HP, and it is always in the right gear. ![]() I have been trail riding it on powerline roads for the last week. I just bought an electric 2017 Alta Redshift MX. ![]()
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