Beware of even more explosive pistons on the 2025 KTM 300's - Even longer and heavier
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- Опубликовано: 10 фев 2025
- A bad problem just got worse. When riding hard, the intake tabs on the stock piston on your KTM TBI 300 are at risk of making contact with your crank arm. This is a known issue. At this point, you'll need a full top-end rebuild. It's best to replace the stock piston before your engine explodes, especially if you own a 2025 KTM TBI.
The 2025 KTM pistons are made by a new piston manufacturer. They are not made by Vertex anymore (which still ran the risk of contacting the crank shaft), and the new pistons for 2025 are slightly longer, making the existing issue even worse for 2025 TBI 250 / 300 bikes.
Don't wait for your top end to self destruct. Cut your piston intake tabs down 2mm and save yourself a ton of pain down the road.
Visit pinitracing.com
Thanks for the video. You're doing a great job. Diagnostics of these and other issues are a very tough thing and there is no replacement for guys like us doing the work and constant teardown to inspect and rebuild . Don't let these internet dudes bring you down... I applaud you Sir.
I did a fresh top end on my 2023 300sx at 60 hours of hard track use and everything was perfect. Replaced the piston with a new vertex piston. Measured everything, skirts were the same length, they don't touch the crank. 2mm is more than enough clearance. If you think the connecting rod is flexing enough for the piston to make contact you are dreaming, especially when the rod is at the vertical position. I personally think if these bikes are blowing up it's either a piston size issue being too small, or no oil in the gas, low grade fuel, detonation.
Great
Thats spelt Denial .
Should've bought a Beta, my Beta doesn't make enough top end power to even need to rev it out, BULLET PROOF!
I’ve been a Honda rider for 20 years
I got a beta
22 200 re. Love it
Fun 🤩
Enough power
Light
Hence why pros in Europe love Betas, they have yet to gain traction in the states 🇺🇸
Beta's are really good bikes
8.32 minute the weiht is witout piston ring anad the next with piston ring.......please correct th video,thank you
Perfect euro engineering
And people wonder why they bankrupt......
Thank God I have a husky te 300
KTM, Husky the engines are the same besides some porting differences and head from Te and Tx, as on WCW and XC.
Still riding a carbed 2018 Husky TE300. Using Klotz premix at 40 to 1.
Hundreds of Idaho mountain trail riding hours, no racing. Still on same top end. So far so good.
@@davidanderson2393 sarcasm
Good video there blinky
Does that mean I'm blinking a lot? Better than stinky. If so, I'll work on that
@ haha just busting balls. Maybe I took that 1st to 3rd gear thing to heart being a hard enduro guy. Either way, def good video!
@@HardEnduroLlewellyn Got it. Bloopers. I'm horrible at that stuff because I don't like doing it personally. I pick on things I can't do.
Where you measure the pistons, is not the place where it (could) make the contack with the crankshaft 😉
Ofcourse
I just rebuilt my '21 top end and used a Wossner piston. I was curious of the weight difference so I weighed the OEM vs the Wossner...the Wossner was 2 grams, yes, 2 grams heavier...roughly the weight of a circlip. When you talk about the weight penalty of the Wossner, what kind of differences are you seeing?
The end result is every piston I weigh never weighs the same as the next, even though identical. It's just all food for thought when looking at why things may have problems. 2 grams is not a problem
You aren't measuring the skirt length from the wrist pin bore. False advertising!!!
I get what you are saying, had the same initial though, but measuring from the crown is still good unless perhaps the compression ratio is higher and therefore the crown might be slightly higher than stock. Either way, the difference in length was so large the margin probably didn't matter.
Well false advertising is kind of a dumb thing to say as I'm just trying to let people know of a potential problem. It was done correctly from the wrist pin to verify it all, but setting that up for a quick vid made it a long vid. Thanks for warning people about the potential scam though.
@@pinitracingdevelopment5445 Dude ... I bet none of these dudes try to put out anything helpful . they all view and critique without ever producing a spec of content that could go under the same scrutiny .
So are you suggesting to change the 2025 Elko piston out with the Vertex before you even ride the bike?
Whatever you do, the intake tabs need to be trimmed 2mm to get adequate clearance between the piston and crank. Personally I wouldn't send anyone out to ride that's going to be revving this thing hard without a trimmed piston.
I did the shortening on my 2023 SX300. But no need to remove material from the very back of the piston. It may (or may not🤔) contact at the "front" side of the intake skirt...
Beta and tm racing doesn’t have this problem
And tm makes more power and sings to high heaven
Does the 250 have these issues?
They don't have the clearance issue. As far as them scattering, I haven't had many reports on that like the 300
@@ktmhusky I have, seems there is a potential pv flapper hitting the piston under load..and the piston hitting the crank. had a few 250sx on the bench that grenaded.
@@themotocrossmodchannelWulfMX Cool. I don't mess with the 250's like 300's so that's good info right there. Thanks
@@themotocrossmodchannelWulfMX Hey Josh. Now I know why it was good input
@ Hope all is well with you- talk soon
Buy the chinese one its cheaper so u have coin left to fix it after it eats itself..😂😂
Ktm junk