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I'm pretty sure the inner upper tube is impregnated on the production 19 kx450 upper tube. Other than the placebo effect of the exterior dark kashima, they're essentially the same I believe.
You can put billet pistons in this if you really wanted to.
Basically none of the used dual spring a kit stuff that you see pop up used is better than the production fork. Anybody is entitled to spend however they see fit, but unless you're buying a brand new set of spring works forks from showa, I dont think you're gaining anything. And you're what, 6500$ for a new set, plus clamps? I havent been into the internals of a 2018+ showa a kit spring fork from PC so I cant comment on how they compare to the production 19 kx 450 fork, but I'm sure for 99.9% of the riders out there its not worth the price tag. And i've owned and ridden Kit stuff so i'm not just blowing smoke about how its a waist of money. I'll be moving my kit internals from my old kit shock over to the production body because right now PC doesnt have a body for the 19.
He said the sphere are plusher than the KYB's and runs them on his bike.
Still have not decided what I'm going to do. I want to switch out my AER's to spring and I have 10 plus yr experience with the KYB sss suspension on my Yamaha's and they are easy to work on and parts fast and easy to get.
The Shop
I rode KTM's for 10 years up until last season where I switched to Yamaha. Everyone told me how blown away I'd be by the suspension but having switch from cone valves (I had 1 set of silver, then 2 sets of the new black sets), I could not get the front end to handle. Changing springs and valving multiple times it just wasn't happening.
I was then told by a couple of guys on Yamahas that had bought them that A-kit was the way to go and would solve all my issues. A few grand lighter and I now had a fresh set of A-kit front and rear from technical touch...same problem.
The front end would not hold up in the stroke and the only way to solve it was run mega stiff springs, which in turn made me lose the plush-ness that everyone raved about. Spent all year switching settings and testing and never felt fully comfortable. Oh and by the way, the A-kit does need servicing just as much as the new black cone valves. 40 hours if you're riding dry conditions.
I have now sold my A-kit and have a set of cone valve and trax shock on order for my 2019 YZ 450.I know these will hold up and the level of adjustability is infinite with the conical valve internal, plush the 40 clicks of compression adjustment.
These should be here next week and I may make a video comparing my stock yamaha suspension Vs new WP stuff. Bottom line is, it comes down to what you like. I like a bike that sits up in the stroke and holds the front so I've gone WP. I'm sure there will be a few guys on here saying I am mad...
I think it was Vital that just did the test of WP units on the new RM-Z and claimed a massive overall improvement...
16:30 of the podcast: "I get asked this all the time: If I was buying A-kit for my bike would I buy WP....Absolutely I would buy WP..."
He doesn't know if the WP kit is fully justified based on the price tag but there is definitely a marked improvement in performance and durability.
He kept talking about how surprising the end result was and how good the WP kit stuff actually worked on the YZF. But he never talked about why he was surprised by it specifically. After listening to it i just had one question in my head and that was why he had relatively low expectations going in to the test. Saying that you got pleasantly surprised by an product doesn't really give the listeners anything unless you explain why.
I might be nitpicking here but that is something he could work on in future tests/podcasts!
I also don't understand why he was so surprised at how well they work considering he raves about the WP kit performance on his KTM. The equipment has its specific characteristics and always will based on the technology, regardless of what bike they are bolted on to.
@Motofinne, I am racing in Heinola, Finland September next year for European enduro championship, so maybe we can talk about this over a cold beer!
For the record I have CV's on my bike and they are a huge improvement over the AER48.
Pit Row
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