KTM 790 890 890R Cam Lobe Inspect / Duke Adventure Camshaft Inspection

[@robdalton2]

Thanks Jason! At 7:57 “if you’re new to this” 😂 ya’ll at this point you better not be new to this 😂

[@HUSKY7-1]

So were your valve clearances within specification?

[@justmyself1000]

Good idea to check valve clearances while you're there. Thank You for this!

[@2SanityAtitsBest2]

2020 was the 790. If your is an 890, it’s a 21+ Thanks for sharing. I was happy to see the view slots. I’ve got mine all pulled apart. About to check the cams on my 790.

[@jmonintwo]

Good luck bro!

[@therealturbofanisme]

On the Duke, 2020 is an 890.

[@rgthomson1]

The ones to pay attention to are the ones on the right of the bike, furthest from the chain, those are the ones that will be starved of oil first if any and they really need checked by 10 to 12k as they have been a problem on the 790, if buying one over 10k get it checked out prior to sale or it could be pricey and even though KTM know this is a problem they wont fix it for you

[@fs5866]

That mean i would need to check my cams about twice a year? F that, ktm can keep their bikes.

[@davemanttt]

You don’t really have to make sure the chain doesn’t drop. There is a bolt perpendicular to the plain of the chain that makes it impossible for the chain to drop down into the engine (at least on my 890 adv r there is). You can see this bolt if you look down into the slot of the chain.

[@m2menuiserie540]

Did it ever run again? My mechanical expertise is almost on a par with yours, Jason, but I've had the cataract operation on both eyes, can usually find my reading glasses, and would definitely read the workshop manual very thoroughly first. Given that the KTM warranty is a supernatural form of religious experience, I can understand the need to do the job yourself!

[@jmonintwo]

Valves were fine. Cams didn't scare me. Been ripping it for last couple of months. WIll take another look at it this winter.

[@queenslander954]

KTM warranty dept is like Sargent Schultz , I see nothing , I know nothing 🤣

[@atpete137]

I wonder if the 790 are the bikes that CFmoto have built. Makes me hesitate buying one of their new 450s

[@AntaresSQ01]

The ones with the issues are early austrian bikes, thee issue is blown out of proportion though, maybe 1% of the bikes are affected probably less

[@therealturbofanisme]

​@@AntaresSQ01you have *no idea* of the actual failure rate. It hasn't been published. You don't know it's less than 1%.

[@fs5866]

@@AntaresSQ01 I've met a dude by chance while changing my tyre 2 weeks ago that just had his cam shaft replaced on a ktm 890 duke at 5000 miles, soooo i think that issue is more prevalent than 1%.

[@Angry-Lynx]

1% 😂 This f.....g guy..... Most people who checked have problem. It's not IF u have problem. Its WHEN

[@bikenavbm1229]

thanks for taking the time

[@ADV_explorersgreekriders]

Πολύ ωραία μπράβο εγγραφή

[@matek1217]

Hi! I’ve got a question. I’ve checked cams in my 2018 Duke 790. And I have an issue with exhaust cam followers at Cylinder 2. They moved out of a valve and I can’t move them back. Referring to instruction - I’ve rotated engine to OT2 and still I can’t move them back. Do you maybe know a solution? Thanks

[@jmonintwo]

Hey sorry I dont know how to help - didnt take mine out - hopefully soon someone will do a vid on taking the cams out and replacing them.

[@AlamosaOutdoors]

That happens when the shims are not fully seated. Check them closely and you may even need to hold it down with a pick while sliding the followers back.

[@RatBike750]

It's a tough deal checking the valves. Look at the diagrams of the sliding followers. You have to do it by feel if you don't pull the radiator. Check that the sliding followers are in the right place at every step. Check clearance at the end while holding the follower in place, or you might pop out a shim. I'd trade a few ounces of extra weight to make the cam bridge less fragile to get rid of that dumbass KTM procedure and the potential disaster of losing a shim and not realizing it. I'm sure there is an Austrian engineer very proud of saving a few ounces and creating this insane system.

[@carlossheppard1745]

The discoloration on the cams is an early sign of stress on the cam. And going off other 890 cams what had similar discoloration before failing it will increase over the milage. Another inspection at 10,000km will sadly show the increase. Check out KTM Failed Camshafts because many have the same issue. Camshafts should last the life of the bike and discoloration shows what’s inevitable to come.

[@jmonintwo]

Yea I'm betting so. Will probably b ordering parts one day. Hopefully there will be a fix by then.

[@NaMinesClarence]

🤣🤣🤣🤣🤣🤣🤣🤣

[@majormassenspektrometer]

@@jmonintwo Why throwing money on garbage again and again? Anyone who buys KTM bikes should know by now what they are getting into and stop supporting this crap company.

[@jmonintwo]

Ive had a ton of KTMs - theyve all been bulletproof - this problem has me disappointed tho

[@AlamosaOutdoors]

@@jmonintwo cams can be back ordered for months at a time. Might be a good idea to order them far in advance of when you are ready to install.

[@Gl_uk]

Seems there are the rockers problems. The cf moto 800 with same motor haven't this issue. Try to find the video: Проблема с моторами КТМ LC8c. Разбираем нашумевшую тему с плохим конструктивом моторов КТМ 790/890. it discusses in detail the causes of problems and possible remedies for their elimination (video in 4 parts)

[@zekd]

Can't wait for a lawsuit against KTM.

[@robdalton2]

We shall see

[@RedRupert64]

Shame it's such a bastard to see the lobes and check the clearances. For the first valve service I had my dealer do the work so as to keep the warranty. I don't trust that anyone can do a proper job checking and adjusting the valve clearances, so I'll probably remove the motor when its time for the next valve service.

[@damytzeus]

so much fear. just ride it. my 2020 790 rally cams were perfect at 18k miles. my 2021 rally has some pitting, not premature wear, at 18k miles and ktm replaced cams. both bikes ran perfectly. go ride and stop looking for problems. breathe.

[@showmytime9177]

this is the 2023 version ?

[@jmonintwo]

I think its a 20 or 21 - cant remember right now - not a 23

[@mementomori4972]

I lost all trust in KTM, when they started production in China. That's a Cf-Moto 800 MK or MT engine. Changing the parts is not a big deal. if you can do basic maintenance, which includes adjusting the valve clearance, you can also swap out the cam shafts. It's a valuable skill and not hard to learn. Problem is the price of the parts. Both camshafts are around $800 and then there are the rockers, which are around $100 a piece.

[@benplaysbass2491]

The issue is pre 2020 when CFMOTO took production of this engine

[@Angry-Lynx]

Doing valves is not basic maintenance. Changing your brake pads is. And most people don't do even that by themselves

[@mementomori4972]

@@Angry-Lynx Everything listed in the maintenance schedule and needs to be preformed on a regular basis, is basic maintenance. What most people do or not do, is not a valid metric to determine anything.

[@motozz8258]

These marketed and glorified Euro bikes have been second rate since the beginning , anyone own the early dukes . The dukes that leaked unfiltered air after the air filter box , poor builds always have been across the board . Victims of GFC the fanboys defending then , Austria had a ton of money while most countrys financially suffered . Cue billion dollars of contracts to sell and protect or contracted no comment on poor quallity ktm bikes . Amazing how humans get sold on something there told is good haha , like this is a new thing with ktm . 16 years so far of the same thing , Euro bikes deceived the masses well.

[@fs5866]

trully most EU bikes are euro trash, can't think of one brand that can compete with the japanese in reliability.

[@Angry-Lynx]

​@@fs5866yes they all not very reliable but ktm especially, it is on another level