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lowmass Added a reply to Triumph TF450 transmission updates.
2/23/2026 5:33am aees.... The part on getting "the cooling wrong", can you tell more on this please... I havent seen a problem here yet BUT admitedly I am a mid range rpm guy AND on top of that Ive been on the easy side with the bike so far as Im recovering from injury. MY biggest concern here is actually the valve...
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lowmass Added a reply to Triumph TF450 transmission updates.
2/23/2026 5:26am YES I have 5 oil changes before I finally split the cases. I was still finding wads of the redish brown scotch bright pad material on the oil screens when I split things apart. AND dont think it was an isolated case. I have seen 2 other videos showing someone draining oil and showing the screens. I see the exct...
lowmass Added a reply to Triumph TF450 transmission updates.
2/21/2026 6:53pm Agree I see QC issues all over my motor An oil pump rotor that was cast poorly. So out of spec it was stuck in its bore and started eating the drive gears. YET some are OK. How did it get in tere like that? It was obvious to the naked eye Missing O ring in the heads breather vent...
aees Liked a reply to forum topic Triumph TF450 transmission updates.
2/21/2026 6:36pm
They already got one thing wrong, at least, with the design. Cooling wasn't sufficient. So I'm not prepared to rule out it needs to be redesigned in several places. If it was poor QA/QC, parts would also break more and it would be binary outcomes, or wear more but when replaced it would all be good. Here, things just doesn't seem to be working together. Clutch engagement and false neutral isn't QA/QC, its poor design including specification/tolerances it seems. No matter what, I agree they just need to step up and fix it. Can't understand why they don't talk more...
This forum topic has 318 replies.
lowmass Added a reply to Triumph TF450 transmission updates.
2/21/2026 7:24am Ha is anyone gona do that? my plan is to go through the entire bike starting with transmission. Hope to find a fix. Dont plan to sell bike yet BUT if I do I may be the only one who can say mine is fixed and good to go 
shortty761 Liked a reply to forum topic Triumph TF450 transmission updates.
2/21/2026 7:21am
Just make sure if you’re the one selling your old Triumph to little Johnny moving up to a 250F or John “never had a dirtbike before” Doe, that you inform them of the transmission issues so you don’t ruin someone’s first dirtbike experience.
This forum topic has 318 replies.
lowmass Added a reply to Triumph TF450 transmission updates.
2/21/2026 7:27am The 250s have notchy and hard shifting as well. This is well documented. I am presently diving into the engine on my TF 450 RC in an attempt to find a fix for the shifting issues. If I find a cure I will report it here. I expect this will take a few weeks. In the mean time here is...
lowmass Added a reply to Triumph TF450 transmission updates.
1/9/2026 2:50am I dissagree. The transmission is a basic design similar to all of them. Its not a new design concept with teething pains Ive been through most of this bike now and the "design" looks fine and there are bikes that do not have the issues Based On waht I found and what I see I say there are simply parts...
Freakazoid Liked a reply to forum topic Triumph TF450 transmission updates.
1/9/2026 2:43am
MXA has really jumped up a couple notches in my book after mentioning this in their 2026 450 shootout. They were calling the F outta Kawasaki for a bunch of reliability issues too lol. I would love a reliability shootout, as a common man myself. I can't wait to buy a new Triumph MX bike in the future, once the wrinkles (big and small) get ironed out.
This forum topic has 318 replies.
OldTech Liked a reply to forum topic Triumph TF450 transmission updates.
1/9/2026 2:42am
As long as it's not popping out of gear under load or between shifts the problems should be fixable. It just sucks that the cases need to be split on a new bike and Triumph really doesn't have an answer yet.
This forum topic has 318 replies.
lowmass Added a reply to Triumph TF450 transmission updates.
1/2/2026 6:35am I would caution people to not sell their triumph too soon. MXA is on record praising the Triumph TF both the 250 and 450. This all befor the latest 450 shootout However that was preliminary reports AND even then there were veiled tones of caution in their voice. My thought when I first heard these reports was " they are...
lowmass Added a reply to Triumph TF450 transmission updates.
1/2/2026 6:14am so far I see no obvious "design issues" with this bike. Only quality controll issues at mfg/ assembly. I speak as a design engineer with decades of experience. It looks like a good design simply hampered by some bad parts
lowmass Added a reply to Triumph TF450 transmission updates.
1/2/2026 6:10am The 26' suposedly has all the upgrades BUT why is it that MXAs 26 shoot out says the TF450 still has what sounds to me like the same shifting issues that the 25' does ? Im concerned that while there have been some parts "upgrades" , it looks like quality control issues continue This doesnt give me me much confidence...
mooch Liked a reply to forum topic Triumph TF450 transmission updates.
1/2/2026 5:54am
Back on page one, @Kris Keefer popped in and said he'd look into it if somone having the issue would email him the details. Don't think he's posted in this thread since then.
This forum topic has 318 replies.
JMCR250 Liked a reply to forum topic Triumph TF450 transmission updates.
1/2/2026 5:53am
If a Japanese manufacturer released a model with this litany of obvious quality/design issues, the heads of design and manufacturing would probably commit hari kari in shame for overseeing such a shoddy operation. No company/product is perfect, but this is over the top in my opinion.
This forum topic has 318 replies.
yak651 Liked a reply to forum topic Triumph TF450 transmission updates.
1/2/2026 5:53am
Anyone ask Keefer what’s up with the shifting?
This forum topic has 318 replies.
lowmass Added a reply to Triumph TF450 transmission updates.
12/31/2025 9:26am yes I want more info as well, thats why I sarted this post. What I want to see is some close up pics of shift forks from a bike thats doing the same. Specifically what do the wear marks on the fork fingers look like? Is there evidence that the forks are not wearing evenly wich would indicate that the...
lowmass Added a reply to Triumph TF450 transmission updates.
12/30/2025 3:09pm why are you assuming its a consperacy? try the Triumph fakebook page, theres many complaining there that there bike shifts hard, misses shifts, fals nutrals etc MY TF450 RC has only 12 hrs all easy going (I blew an achilles last season so riding it but not hard) YET it has shifted hard from new I dont quick shift and...
lowmass Added a reply to Pics of TF450 transmission parts??
12/30/2025 9:08am Thanks motomind Triump was very good about replacing my clutch and shift star. However I havent heard that they are actually on it with the shifting issues. Are you saying they are actually replacing forks and drums now?? MXA is saying the 2026 TF450 is shifting poorly. If the only updates are the clutch and the shift star then its...
Saz Liked a reply to forum topic Pics of TF450 transmission parts??
12/30/2025 9:04am
I rarely use the clutch to shift while actively riding. I do the typical clutchless shifting. Letting off the throttle a tiny hair a bit to clutchless shift up, I do the same clutchless shift going down by adding a tiny bit of throttle. Ive also used the quickshifter function without any issues. I can try experimenting this weekend with specific situations. Im running 20mm+ hammerhead shifter from my 25 YZ250F. My YZ250 honestly had more issues shifting under load than my Triumph.
This forum topic has 15 replies.