[TrouserSnake]

Is this sudden off-ramp common with modern cams, not seen such an aggressive closing before.

I think ramp off looks sharper in that pic than it actually is.
When looking side on the profile looks similar to the cams in my 1190, which also has finger follower type valve drive.

 

[Ianktm]

I was but with the different connection plugs and probably not being able to see anything under the bridge I just checked condition of the lobes, that was hard enough to get the angles to look through the splits in the bridge

 

[charlie264]

@Ianktm That cam in pic 3 looks like it is suffering a little?

Did you test oil jet flow when cranking?

Its the bluing colour that grabbed my attention, the Galling aint great at 3000.

 

[Ianktm]

Yeh me too, but totally smooth and looks perfect with the eye, might be new honor phone 108 mp cam and ai that changes colours somehow and probably sends them all to china

 

[Ianktm]

I asked the ktm techs about any cam problems and they had a few 790,s but no 890,s at the dealership, usually do my own services after first service but gonna get 2nd service oil change done to keep in warranty but probably be a few yrs before I get to 16k miles

 

[DavidS]

A guy at P&H this morning said to keep the dealer stamps up and their experience was only on the earlier 790/890’s but that may partly be down to lack of mileage.
I’ll be on annual servicing so oil changes at probably max 2k a year so I’m not going to get too het up at the moment.

 

[andygbsmith]

It’s a big problem with the longer service intervals and valve checks, by the time the issues appear most bikes are out of warranty and no manufacturers going to care anyway.
i guess you could keep the service history and get them to do a inspection just before the warranty is up. Obviously anything you fit that’s not out of the power parts catologue they can use as a get out should be removed.

 

[TrouserSnake]

Have there been any updates on this from the FB group?
(I can no longer access it as they've gone private)

Matt of "Dirty Garage Guy " on youtube has been given a head and some cams to test is doing a series on the issue, no updates as of yet though.

From what he's said so far though it does look like this issue could develop quickly once it starts. As soon as the hardened surface fails the cam lobe will quickly wear.

 

[bigkuri]

I've been looking at buying a jeep, the KTM have nothing on a jeep V6. A ton f failed cams due to lack of hardness and lack of oil flow. Many class action suites have come up zero. Takes a lot to prove how long any engine should last.

Can only vote with your feet....

 

[Ianktm]

Gonna have a look next couple weeks on starting my smt with camcover off, I think there's enough slack to take tank off then 180 degree it so it's next to the bike and can see the topend, put dirt tricks tensioner in and works well, silent now, my smt was rattly from new, 20/50 oil is going to be thicker cold so maybe that would help, but comes down to paying 13250 for one of the first last year I shouldn't be taking the camcover off to see if they've melted?

 

[fozzy17]

 

[Ianktm]

Oh shit so they knew the problem with the 790 and just ignored it and built the 890
READY TO RATTLE

 

[lcjohnny]

I am hoping that now CF Moto have a reputation to build in western markets they will become more concerned with quality & reliability than KTM have have been.

I mean hardening cams deeper or increasing oil pump pressure won't reduce performance but they will reduce short-term profits a little bit

 

[bigkuri]

The problem will just propagate along with the endless model lines; 790, 890, now this new 990 twin, next year a 1090 twin, why not. Keep on flooding the new market you don't have to worry about the old market. Journo's don't care, they get flown to Merzouga to ride a brand new bike and write glowing reports on the must have features.

Or maybe I'm just cynical

 

[PH1969]

Or maybe I'm just cynical

Or a realist

 

[Ianktm]

Just another update on my 2023 smt 890 4000 miles cams are fine and smooth, no ridges, ran a fine electrical screwdriver across them all no pick up marks all smooth, getting oil change next month to keep the 2 Yr warranty, been using g this bike properly aswell so ran in to 600miles then hooned well got 3000 out of the Michelin gp rear and just threw a new one on, I'm putting extralube zx1 oil metal friction eliminator in with next oil change, then I'll be changing oil every 4000 myself, but all looks good in there

 

[Seagoon]

Careful about putting additives in the oil if you are trying to preserve the warranty. I haven't read the terms of the warranty but many say to only use what the Manufacturer recommends

 

[Ianktm]

I just won't tell them, I was a bike tech, never had an oil analysis done on any recall and there was quite a few, ktm still aren't acknowledging there is a problem yet, but some have had new cams but just watched a tech on YouTube and he was saying there getting cams but got to pay 10 hrs labour, sounds bullshit that ktm are charging for there fuck up, and more like 5hrs for that job

 

[Seagoon]

And are the cams the problem? Seems more likely to me it's an oil feed problem.

 

[Ianktm]

Yeh not enough squirt