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- Опубликовано: 13 июл 2024
- KTM 450SXF (2015-2024) top end rebuild. Will be about the same for the Husqvarna FC 450, Gas Gas MC 450F. and more of the same.
Enjoy!
Link to the video on cylinders... • 1:11 CYLINDERS. Nickel...
Donate Race Fuel link... www.paypal.com/donate/?hosted...
Thanks for watching!
upallnight91@hotmail.com 
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Don't even own a 4 stroke and watched the whole video. Always giving great advise for any type mechanical work with motorcycles. Besides your love of Reggae music, I love your videos. LOL
Right on! I appreciate you watching. Long live the 2 strokes!!!
I really appreciate all this content you are putting out there. Thank you, it helps a ton.
Thanks! Appreciate that and glad to hear that it helps!
Thank you man, very informative video, just bought a KTM 450 so i'm now learning more about these engines. Greetings from Finland.
Hello Olle Södö in Finland! Your very welcome. Thanks for reaching out!
You are pumping the vids out! 🫡🫡🫡
lol Yes sir! As these jobs come through I need to catch them!
2 of my buddies have these bikes… this will serve them well! Thank u 🙏🏽 also just for shits , I’m from bullhead city Arizona 😂😂 I’m an ant 🐜 on the map
@@Factory928AC My pleasure! Bullhead Arizona! Nice!. I'm a Ant too. A bottom feeder in the MX world lol
These are maybe the most informative videos I’ve ever watched, great work. I have a 2021 450SXF - bought used with 60 hours, got my valves adjusted at 90 hours (had one tight intake valve and one loose exhaust valve). Mechanic said everything “looked good” but didn’t mention concern for compression or top end just yet. After watching your video, I am paranoid that I need to replace my top end and timing chain right away. However, I have reason to believe that the piston in the bike is not stock as the previous owner was apparently very on top of maintenance.
These 450s' can go well over 100 hours on a piston with most riders but I try to change them out before 100 hours just to be safe. If your at or over 100 hours it wouldnt hurt to do a top end. This bike is one of the easier bikes to do a top end on so thats good at least.
Yes, Rotella is the best as well as ethanol free fuel. Another great video!!!
Yes sir! Been using rotella since 2003 with great results. I even use it in my Mustang and F-150 gas vehicles lol
Awesome video with lots of details!!! Super!!
Thanks!
Thank you good sir... just did the top end on my 450sxf with the help of your video.
Thats awesome to hear! What brand piston did you go with?
@@UpAllNight91 I went with the wiseco 👍
@@warrenharper Right on! The OEM piston requires a ring compressor to get it in which makes it a slightly harder job. Mainly due to the oil rings, they way they are designed.
How do you know when you need to rebuild the top end? My 23 sx-f has been feeling kinda dull not nearly as snappy as it used to feel I take good care of it maintenance wise but I ride it hard and race it
@@tony420tokebowlz Hello. 100 hours for a 450 is good and safe for most. If the rider is very fast or works the motor very hard than that can be shortened to 60 hours. I would suggest a new timing chain too if you want to return the snap. As the chain stretches is retards the cam timing which kinda softens the motors hit some.
My ktm 2017 450 XC-F (trail bike but not the enduro) had 300+ hours on it. I only reshimed the valves at 200 hours. I keep sending oil samples in for testing but the thing runs still with no problems at all and the tests come back clean. I ride the piss out of it too.
Thats awesome! I like hearing things like that. My wifes YZ125 has about 300 hours on the original crank now and it still measures out about as good as new which blows me away. The whole idea of changing pistons on a track bike thats used with jumps on the course is the piston can crank or break a skirt off after so many heat cycles. Especially the stock cast pistons a lot of bikes come with. Its more about safety than anything else. But if the bike is not used on the track with big jumps its not as big of a deal.
@@UpAllNight91 your wife must be nice to that thing. the neighbor kids had a 1998 yz125 and I rebuilt it 4 different times (from catastrophic failure) with all OEM parts. the last time they blew it up I told em I was done and they bought one of my KTMs off me and I haven't had to work on anything sense!
@@endurofurry Yeah shes pretty easy on it but still its pretty impressive how many hours its hung it there. What blew up on the neighbors YZ125? If its OEM pistons coming apart I wouldnt be surprised.
@@UpAllNight91 Yes I was using OEM pistons. I have had very poor luck with how long wise co stuff lasts so I try an avoid it. I think it has a lot to do with our riding here which involves a lot of mud and rock. Wise co stuff doesn't seem to hold up to the high wheel speed and then instant traction from the rocks. They crack and break at the wrist pins. I did try a wise co on their 125 and it completely locked up on its 3 tank of gas and scored the wall. that was actually the last time before I made them sell it. I broke it in myself so I know it wasn't that. I checked the ring gap, piston direction, and clarences probably 3 times at least. it was all right. This bike was making me loose my mind because I work on bikes a lot. I have never had a bike come back to me yet for repairs on something I messed up. Im not fast but i do good work. I have personally owned 2x yzf's and 1x TTR in my life i have snapped the frames of every one of them so i quit buying yamaha after that. From the sounds of the new bikes quality. I made a good choice. It sad to see yamaha, another former king falling...
@@endurofurry Wow, thats crazy. My experience with wiseco has been the total opposite. The only frames I have ever broke or cracked has been steal frames but I have seen pictures of aluminum frames that have cracked.
Beavis got himself a little lady lol! Great video as always
Thanks!. Yeah the big white chicken is Butthead. We brought beavis and butthead home together as baby chics and from day one Beavis has been in love with butthead. Them two are always together. Butthead is a big ol chicken, shes a sweatheart for sure.
@UpAllNight91 and great video the other day of the Yz250 BTW! Like how you had a problem, diagnosed it, then went from there. That's how we learn. No worries wont steal any of your business lol I'm from Pittsburgh
@@dougw585 Thanks! Yes I'm trying to put these together for two types of viewers. The one who just needs to get through the job, and the one who is actually looking to learn how to be a bike mechanic. Pittsburgh! Dont think my customers will drive that far 😂. But I sure hope your business is booming up there and thriving well!
Oh no way on running a business, everything learned from you is for my bikes only. Drive truck for a living with your videos playing all day long lol
@@dougw585 Ahh thanks! I have a friend who drives trucks, his son is the one who rides the YZ250f that had the valve drop. He listens while driving too. I myself listen to other peoples videos while working in the shop. What did we do before youtube lol
Great Tee shirt!!!
Thanks!
Keep up the videos bro! If you ever get a KTM that smokes after installation of anything other than an OEM piston even after honing use an OEM piston and the smoking will stop. The ring design is different and can matter, sounds crazy but not. I would have changed the tensioner as well.
Thanks! A thanks for the tip on the piston and smoking. I will surely log that in my memory. Nothing better than hearing from people with hands on experience. The tensioner, do they have issues on this bike that you know of? T
I once installed a piston with 3-piece oil rings to my 350. After that it smoked heavily. Smoking stopped with OEM piston that has 2-piece oil ring system. Maybe installed oil rings incorrectly somehow. Not sure.
Also OEM piston is not 400 but more like 220€.
@@ssse3123 Right on. Did you oil the piston and or cylinder before install? Sometimes that can jack up the oil rings for a while. Thats why I put them in dry. BTW the price for the OEM piston here in the states is $452.67.
Very thorough details and descriptions of the entire top end rebuild. Thank you! You didn't show it but are you checking ring gaps? The last Wiseco piston I bought for my KTM 300 needed a few thousandths trimmed to meet spec.
Hello. I typically dont check ring gap on nickel plated cylinders. When using OEM pistons and rings everything is machined to be just dropped in and ran, as if it was on the assembly line. However I can imagine using a piston like wiseco could be different and I probably should start checking them to just be sure. I havent seen any issues related to too tight of a ring end gap when using wisecos, and been using them for years but I been thinking I probably should start checking to be extra sure and your comment has kinda confirmed to me that its probably wise to at least check when using a none OEM piston and rings.
Estonia too!
Right on Hello Estonia!
Awesome video. Thank you for posting this. Going to attempt my first top end job after watching this on my 2021 ktm 450. While you were doing the heat cycles you had the clutch zip tied in. Could you share the reason? I might have missed why you did that.
Thanks. Yes the clutch dampeners where bad and making a clanking sound. I did mention it at the end but it is probably easily missed. The very next day I replaced the clutch dampeners and also made a video on that job. Here is a link if your interested.. ruclips.net/video/wzoOUZj0xwo/видео.htmlsi=HimxOIZo1Bj2jwT1
Rotella for the win!!!
Yes sir!
Getting ready to rebuild a 22 ktm450 myself. Another great video my man!
One thing I do to stop the dirt that hides on the cables and connectors is wrap and tape a trash bag around the upper frame.
What ratchet was you using removing the head bolts? Looked pretty cool
Ahh thats a good idea on the trash bag on the upper frame. The 2022 KTM 450 is just like this one, its a pretty straight forward job. On of the easier ones when it comes to KTM's
Top videos! The KTM 450 looks about the easiest of all the 450 manufacturers to do a Top End on, would you agree? I couldn’t find a video of you doing an RMZ 450?
Thanks! You are right, the ktm 450 seems to be the easier 450 to do a top end. Lots of room and pretty cut and dry. I don't have any RMZ450's yet but looking forward to one as soon as one comes through my shop for a rebuild
@@UpAllNight91 Many thanks for the reply! Looking forward to your next bike to be torn down and rebuilt!
@@vincentcort5747 for sure. I'm kinda upset at myself I have a KTM 85 that I tore open for a repair and didnt even think to start recording lol. Ohh well the next one will come very soon!
Excellent video production and overall instruction and maintenance skills. Is all “Red Loctite” the same? What number are you using?
Thanks man! 271 is what I am using. However I have switch over to Stuck Nutz brand. Their red thread lockers is equivalent to 271. They are a dirt bike brand that supports the sport.
hello sir can you do a video covering a service on KTM air forks. love your videos
Yes. I actually just did some and should have did a video on them. I will try to grab a video on the next set that come in for sure. Thanks for the suggestion.
You seem pretty knowledgeable so im going to guess you did but you didnt show checking the ring gap of the new ring GREAT VIDEO BTW
Hello. Thanks and Appreciate it! . I didn't check the ring end gap. On stock bore nickle plated cylinders its pretty plug and play. I put a video together covering ring end gaps if you are interested here is a link ruclips.net/video/5wdMNpgAAYo/видео.html
@UpAllNight91 Your correct I just double check cause there is always the chance they sent the wrong rings lol like I said though great video
@@RugsadventuresFor sure that can happen. I do these all the time and would hope I would catch that by eye and feel but yeah
Do you ever check ring end gap or measure piston to cylinder wall clearence
Hello. No, usually not. I have a video I just uploaded explaining ring end gap and why its usually not necessary on these bikes, as well as a video on cylinders that covers how to quickly inspect them for wear. The ring end gap video is my newest video If you are interested in catching it.
Have you done any Sherco 4 strokes yet ?
No I havent yet. Maybe soon though
Indonesia
Hello my friend from Indonesia!!!
8:47 Canadian viewer
Hello Canada!😄
Question I have a 2018 sx f and when the bike is hot and I hit the gas and let off it shuts off could that be a sign of a top end needed ? Or valve adjustment
Hmm, I'm thinking its not any of them two. Not sure what it could be but I dont think its the valves or the compression. I would first check the cold start knobs adjustment and make sure thats good and start with that. That knob can cause all kinda of weird running issues if its out of wack. If you dont know how thats adjusted I did it in a video on the following link ruclips.net/video/_03IYvbuzw8/видео.html
@@UpAllNight91 it was definitelyy yellow knob was out of wack I adjusted and it’s been fine since
@@BrowardBikelifeTJAhh thats good news! Easy fix!
Hey bro are you in Florida and do you offer a towing service if I wanted you to come get my bike and do a rebuild on it ? I’m down south in boca Florida
Hello. Sorry I do pick up bikes for work. They would need to be delivered to me. I'm located in Parrish FL You can email me at upallnight91@hotmail.com if your interested
Thanks ,does it call oil on the head bolts? I would not idle a piston with new rings even if I didn't ruff up the bore. Thanks again.
The manual for this bike does not mention to put oil on the head bolts but it is good practice too.
@@UpAllNight91 So then those bolts are way tighter than spec. Blipping the throttle would pull oil pasted the rings to cool them off so they don't loose their temper....
I don't know, been doing these things these ways for so many years with great success. I would need some serious proof before I change the way I been doing it.
@@UpAllNight91 I'm not being mean or a jerk. There is a channel on youtube called the torque test channel, they have load cells and they measure impact guns and stuff like that. They did an episode on oiling fasteners and using anti-cease on fasteners. It would be great if you took a couple of minutes to watch it. I think you'll be shocked.
I will check it out. Every manufacturer out there suggest oiling head bolts except KTM. However every manufacturer also leaves things out here and there. The manuals are not always perfect. But it is general practice to oil head bolts. Yamaha even suggest oiling them twice during their head bolting procedure. Without oil they tend to creek and total jack up the torque reading
Btw do you have links to the parts you used?
Or part numbers?
Thanks!
Hello. I dont have the part numbers on hand. But they are easy to look up and order online. I have a video that can walk you through this if you havent ordered OEM parts online before. Here is a link ruclips.net/video/slOfGOMQshs/видео.html let me know if any questions come up.
@@UpAllNight91 Thanks ,super appreciate it!!!
@@ronmor8237 Yes sir!
I have an ltr450. Is the clutch side and oil reservoir supposed to be isolated? When I fill my clutch side the reservoir level rises
Hello. The oil in the motor and reservoir will level out to each other after it sit for some time. It takes a little bit but it does happen. Because of this I start them up and let them run for a minute before checking the oil level.
@@UpAllNight91 if I put my bike in first gear and hit the throttle it jump out of car without even releasing the clutch. It doesn’t seem like the oil is staying on the clutch side. When I pour the oil in the clutch side the reservoir oil fills. I don’t get it
@@Jason-zr6il Thats a dry sump system. It sends all the oil to the reservoir and then sends it out the the reservoir only to the points in the motor where it needs it. As soon as the oil falls to the bottom of the motor it is sucked up and sent by to the reservoir. Keeping the engine case "dry" so to say. If the clutch is grabby like that it just means your clutches are old and due.
@@UpAllNight91 ohh okay. I’ll release the clutches and get back to you. Is draining the oil by the 2 island key bolts or the 2 12mm bolts the correct way? I’m researching it and everyone does it either way
Its been a while since I've done a oil change on a TLR450 but I believe there is a drain bolt on the bottom of the tank and also one on the bottom of the motor. But I dont remember what sizes or anything.
You’re putting the top end together dry! No oil?
Yes I install the piston dry.
Does Ktm recommend install with no oil?
@@vegasxrs9401 The KTM manual does not mention anything about oiling the piston.
Thanks for the video 📸
Do you have to change the piston @ 100 (135) hrs? How can I tell if it needs changing.
I'm 64 years old and haven't hit the rev+limiter yet... Never raced.
Hello. Well you dont have to at 100 hours but its suggested for safety. Usually on a good maintained bike the piston will come out looking almost as good as new. Its not so much because of wear that a new piston is suggested, its more about heat cycles and piston fatigue, at some point the piston can crack out of now where if ran too long. But if your not heading towards huges jumps and ringing its neck then honestly you should be ok. I have seen vet rider who ride them off road run them for 200 hours with no issues. However if you plan to catch some air then for safety I would say every 100 hours.
@@UpAllNight91 thank you so much for the insight and advice. I've hidden Hondas my whole life and this ktm maintenance schedule is shocking. Thanks 👍 I think I can do this...
@@johndunn9819 Yes sir, you got this! Just take your time, the video covers everything, just one step at a time