2019/2020 KTM 450 first top end maintenance according to real experience

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11/26/2020 8:26 AM

Hello all,
I’m looking to buy a used 2019 or 2020 KTM Sxf 450 and I can find bikes varying from 70 to 100 hours.
To help me understand the real value of these bikes, I’d like to know when it’s time to make some top end maintenance according to the real experience of owners of those models.
Did anyone suffered any catastrophic issue due to delayed replacement of a piston or valves or other?
Thanks for helping

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11/26/2020 8:32 AM

60-80 hours is a good time to put a fresh piston in.

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Rent free...

11/26/2020 8:38 AM

150 hours....piston looked like new...

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11/26/2020 8:55 AM

greg570 wrote:

150 hours....piston looked like new...

KTM’s can easily make it to that, but when buying used, it’s not worth the risk. You don’t know the bikes history. It’s always good to start fresh, unless it’s extremely low hour.

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Rent free...

11/26/2020 1:32 PM

Look in to whether KTM offer CD-Rom service manual for your model. If they do, buy it.

And I’d only use a genuine piston kit in it too.

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The above may be fact or fiction, I may be serious, I may be jesting. I am not sure, you have no chance.

11/26/2020 9:26 PM
Edited Date/Time: 11/26/2020 9:27 PM

I did a top end on my 2016 450FE at 70 Hours years ago.
It looked great and showed no visual wear at all. I wasn’t having any issues with the bike either, just wanted to do what the manual recommended.
I was surprised how good it looked and valves were still in speck too. Timing chain didn’t need to be changed either.

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11/27/2020 3:27 AM

I did one at 100 hours because I thought it was a good number.... I used to go 50 hours on a 2 stroke....at 100 hours the 450 piston looked perfect the bike ran perfect, afterwards I was worried that I had comprised it by opening it up when it clearly didn’t need it, rather being happy it was fresh...I’ll go150 next time.

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11/27/2020 4:53 AM

Depends on the rider. A class ~ 50 hours. C riders can easily go 100

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11/27/2020 8:48 PM

I know fast test riders in so cal who have done 100+ hours on KTM 450 and the pistons came out like new. I’m sure vet rider could easy go 150 or 200 if they take care of the bike.

I have 90 on my 2019 350 and plan go to 150. I haven’t checked the valves once. I do clean filters and oil. The new bikes are very solid.Regular preventative maintenance, very happy with the bike.

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11/28/2020 3:55 AM

Thanks everyone, I’m coming from a super solid 2013 and happy to learn it goes on with the newer models

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11/28/2020 9:27 AM

150hrs on my 2019 350, race Pro/A offroad. Have done oil, filters, and tires. No problems so far, but will trade her in soon.

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11/28/2020 7:45 PM

No direct experience on a KTM 450, but I have a 16 350xcf with 700hrs+ on the stock original motor, including valves, piston, cylinder, timing chain, clutch, etc. I have never opened the motor. I race Pro/AA offroad in Canada.

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11/29/2020 5:08 AM

Apples to oranges but i cracked open my 2019 KTM 250SXF at 50 hours for a fresh piston and everything looked and spec'd perfect. Vet expert level mx rider who likes to rev. I also put a piston in a friends 350EXC at 200 hours mixed road riding, trail riding and woods racing, had no notable wear on anything.

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11/29/2020 6:27 AM

navalseabee wrote:

Apples to oranges but i cracked open my 2019 KTM 250SXF at 50 hours for a fresh piston and everything looked and spec'd perfect. Vet expert level mx rider who likes to rev. I also put a piston in a friends 350EXC at 200 hours mixed road riding, trail riding and woods racing, had no notable wear on anything.

What kind of oil do you and your friend run?
Thanks , Chris

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11/29/2020 6:41 AM

Sold my 450 with 85 hours. Never even pulled the valve cover to check valve lash. Still ran like it was brand new.

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Tomac and/or Anderson for 2020.....

11/29/2020 7:48 AM

Do yourself favor and buy the piston pin clip installation tool. The clips are a pain the the ass to install without it.

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Take it to the limit, one more time!

11/29/2020 8:35 AM

Monk wrote:

No direct experience on a KTM 450, but I have a 16 350xcf with 700hrs+ on the stock original motor, including valves, piston, cylinder, timing chain, clutch, etc. I have never opened the motor. I race Pro/AA offroad in Canada.

Holy hell, how so many hours? Is there a lot of street or fire road riding in there? I guess in Canada you probably have to let the bike idle all night to keep it warm like a diesel truck, also.. haaa

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Powerband in every gear !

11/29/2020 8:50 AM

Monk wrote:

No direct experience on a KTM 450, but I have a 16 350xcf with 700hrs+ on the stock original motor, including valves, piston, cylinder, timing chain, clutch, etc. I have never opened the motor. I race Pro/AA offroad in Canada.

FGR01 wrote:

Holy hell, how so many hours? Is there a lot of street or fire road riding in there? I guess in Canada you probably have to let the bike idle all night to keep it warm like a diesel truck, also.. haaa

Maybe like 50hrs worth of dual sporting. The rest is racing and training. At peak it's pretty common for me to put 250-300hrs a year riding...

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11/29/2020 8:56 AM

Monk wrote:

No direct experience on a KTM 450, but I have a 16 350xcf with 700hrs+ on the stock original motor, including valves, piston, cylinder, timing chain, clutch, etc. I have never opened the motor. I race Pro/AA offroad in Canada.

FGR01 wrote:

Holy hell, how so many hours? Is there a lot of street or fire road riding in there? I guess in Canada you probably have to let the bike idle all night to keep it warm like a diesel truck, also.. haaa

Monk wrote:

Maybe like 50hrs worth of dual sporting. The rest is racing and training. At peak it's pretty common for me to put 250-300hrs a year riding...

That's a lot of seat time! I imagine you have 55 gal drums of oil and crates full of oil and air filters and spend 2 entire days each week just catching up on maintenance!

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Powerband in every gear !

11/29/2020 9:15 AM

FGR01 wrote:

Holy hell, how so many hours? Is there a lot of street or fire road riding in there? I guess in Canada you probably have to let the bike idle all night to keep it warm like a diesel truck, also.. haaa

Monk wrote:

Maybe like 50hrs worth of dual sporting. The rest is racing and training. At peak it's pretty common for me to put 250-300hrs a year riding...

FGR01 wrote:

That's a lot of seat time! I imagine you have 55 gal drums of oil and crates full of oil and air filters and spend 2 entire days each week just catching up on maintenance!

Funny you mention the air filters. I have about 40 of them and when they get dirty I throw them in a garbage bag and clean them all at once. Unfortunately I must have thrown the garage bag out about 2 months ago cause for the life of me I can't find them anywhere. I'm so disappointed.

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11/29/2020 9:25 AM

My friend has 2019 FC 450 and he changed piston after 100 hours, the piston looked perfect without any significant sign of wear etc. Dealer also mentioned it would be possible to easily put 150 h on the piston without doubt. Just clean/change your air filter regularly and change engine oil each 5 hours.

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11/29/2020 11:33 AM

Purchased my 17.5 FE in January with 140 hours on original top end, I am second owner and original owner was a vet Intermediate. I replaced piston and timing chain, but the stock piston looked great and could have gone much longer I'm sure.

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11/29/2020 1:32 PM

I have a 2019 KTM 450 SXF with a different ECU (Twisted Development), FMF Exhaust and runs VP T4 and sometimes Pro 6 H/T.

It has EXACTLY 100.0 hours on it...laughed my ass off when I noticed the hour meter showed that! So, it’s being torn down to see what things look like. The only power-train parts they’ve been changed are chain & sprockets, air filters, oil and oil filters, 1 spark plug-just because, 1 clutch... & that’s all!

Motor is coming out and going to Jamey Ellis for a good look at what 100 hours does to the motor.

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I ripped a start from Egypt and I was happy about that.

11/29/2020 2:05 PM

TeamGreen wrote:

I have a 2019 KTM 450 SXF with a different ECU (Twisted Development), FMF Exhaust and runs VP T4 and sometimes Pro 6 H/T.

It has EXACTLY 100.0 hours on it...laughed my ass off when I noticed the hour meter showed that! So, it’s being torn down to see what things look like. The only power-train parts they’ve been changed are chain & sprockets, air filters, oil and oil filters, 1 spark plug-just because, 1 clutch... & that’s all!

Motor is coming out and going to Jamey Ellis for a good look at what 100 hours does to the motor.

I'd like for sure to know the verdict from the TD expert!

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11/29/2020 2:09 PM

navalseabee wrote:

Apples to oranges but i cracked open my 2019 KTM 250SXF at 50 hours for a fresh piston and everything looked and spec'd perfect. Vet expert level mx rider who likes to rev. I also put a piston in a friends 350EXC at 200 hours mixed road riding, trail riding and woods racing, had no notable wear on anything.

walent215 wrote:

What kind of oil do you and your friend run?
Thanks , Chris

I run Blud Lubricants, I believe he uses Maxima products in his.

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11/29/2020 2:52 PM

Is the stock top ends look perfect, why are they being replaced? Why not throw those parts back in and keep the new pistons until you open it back up in another 100 hours?

😎

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11/29/2020 3:06 PM

Looking at all the differing threads, when buying ANY used bike. I would be spending my time closely inspecting the frame rather than worrying about a cheap piston.

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11/29/2020 3:42 PM

Monk wrote:

Maybe like 50hrs worth of dual sporting. The rest is racing and training. At peak it's pretty common for me to put 250-300hrs a year riding...

FGR01 wrote:

That's a lot of seat time! I imagine you have 55 gal drums of oil and crates full of oil and air filters and spend 2 entire days each week just catching up on maintenance!

Monk wrote:

Funny you mention the air filters. I have about 40 of them and when they get dirty I throw them in a garbage bag and clean them all at once. Unfortunately I must have thrown the garage bag out about 2 months ago cause for the life of me I can't find them anywhere. I'm so disappointed.

Holy shit! Easily the funniest thing I've heard in a long time. Sorry it's at your expense....literally. .... and I've followed the life of your 2016 350, but didn't realize it was over 700 hours now. Just shows that the guys doing rebuilds at 50 and 75 hours are throwing good parts away.

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11/29/2020 4:26 PM

FGR01 wrote:

That's a lot of seat time! I imagine you have 55 gal drums of oil and crates full of oil and air filters and spend 2 entire days each week just catching up on maintenance!

Monk wrote:

Funny you mention the air filters. I have about 40 of them and when they get dirty I throw them in a garbage bag and clean them all at once. Unfortunately I must have thrown the garage bag out about 2 months ago cause for the life of me I can't find them anywhere. I'm so disappointed.

JB 19 wrote:

Holy shit! Easily the funniest thing I've heard in a long time. Sorry it's at your expense....literally. .... and I've followed the life of your 2016 350, but didn't realize it was over 700 hours now. Just shows that the guys doing rebuilds at 50 and 75 hours are throwing good parts away.

I fully intended to rebuild it at 100hrs—but it ran perfectly. So went another 50, then 100, then 200...and it still ran perfect. So I said, f**k it, let run it till she pops... Half of way through 2019 I gave it to my wife, she competed a couple off-road races that year and did a few moto rounds this year and she still runs great.

I know it's down on power but she doesn't burn oil, starts and runs perfect too. If it pops, it doesn't owe me anything so to get those hours was a good test to KTMs durability. But I do take care of it (and all my bikes). I run T4, Rotella and cycle the filters regularly. I also run a fan so the bike has never over-heated either.

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11/30/2020 7:35 AM
Edited Date/Time: 11/30/2020 7:46 AM

Just sold my 2016.5 Factory Edition and had 190 hours with zero issues. The motor had never been opened and still had original clutch. When it starts getting hard to start is when I would start looking at a tear down and rebuild. Don't forget most newer(2016+) KTM's have a PANKL rod and main bearing. The PANKL rod and bearing assembly is a very stout assembly compared to Japanese counterparts. Your valves are going to give you problems before anything else IMO as long as the oil has been changed at reasonable intervals.

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