If you have a kid that’s racing PW50’s, you already know that this bike isn’t a pure bred race machine like a KTM or Cobra that they’ll graduate to in the next class. The PW50 is a “first bike”, more or less a backyard bike that’s meant to be ultra reliable and a platform to teach kids how to ride. What it’s not really meant for is tackling aggressive motocross tracks with peaky jumps, sand, and deep ruts… It was during a race week at a track that was new - and had peaky jumps - that I noticed something about the way our PW50 flew through the air when jumping. It always tended to nosedive, and while I knew this had a lot - if not everything - to do with the rider, it was just something I couldn’t get Rennen to correct about his riding. I found it to be dangerous and it was something that worried me, even though I knew he’d only be on the PW50 for a short time before moving up to a bike with real suspension. My approach was to correct it by adjusting the suspension, which was tough on a bike with non-adjustable suspension. My first thought was to upgrade to the 2017 and newer style of rear shock, which looked to have a bigger spring and what I thought would be a better shock, just as the front forks were superior on the 2017+ models (which I upgraded to in another video). Once I saw the price of the OEM 2017 and newer rear shocks however, and without any aftermarket options for PW50 rear shocks or springs, I did a fair amount of research, made a few phone calls, and discovered a company that manufactures springs for motorcycles and hoped they could provide some advice for my aspirations to improve the PW50 suspension. I called and explained my concerns to Cannon Racecraft and was met with confident advice by their technical expert. He enlightened me about how the PW50 springs are 75 in/lbs EACH - which is 150 lbs total - and were purposely oversprung to accommodate the parents who they knew would be riding their kids bikes maybe a little too often, whether it’s to the gate at the races, or in the backyards. He guided me towards a custom 35 in/lb spring which would provide 70 in/lbs total, more than enough to support Rennen’s sub-50lbs body weight at the time. While the springs were a little more expensive than I was ready for (around $100), they were noticeably softer than the OEM springs. I really didn’t know how I was going to change the springs out on the OEM shocks as they didn’t look serviceable, but I found it to be fairly easy. I had to use a little ingenuity to take the shocks apart, but once I found the appropriate tools for the job, it was fairly easy.
Here’s the process I used to remove the springs. If you'd like to order springs for your bike, here's the link to the Cannon Racecraft website:
www.cannonracecraft.com/contact/
Негізгі бет Автокөліктер мен көлік құралдары HOW TO CHANGE THE REAR SPRINGS ON A YAMAHA PW50 | Making a safer bike for 3-6 year old racers
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