Cams do look a bit worn to me but they definitely don’t look like they have been running too hot . I have 23 790adv 9k on it ,so far no problems I change my oil every 3k without fail. Great series of videos so useful and informative please keep us updated with the bike 👍🏍️
I have a 2023 KTM 890 Adventure and also the shop repair manual shows idle rpm 1,400rpm (+,- 50rpm), my bike idles at around 1,340rpm to 1,450rpm, and I was watching what your 890 duke engine was idling and noticed it is idling the same as my 890 engine and it seems spot on!
I guess due also to the 13:1 compression ratio along with that restriction from the catalytic converter on there would build a lot of back pressure to the piston chambers over time could contribute to that piston failure, and I think a de-cat would be going in the right direction to relieve some of that high heat back pressure for a cooler running engine.
Does the Arrow de-cat pipe keep it not as loud as some of the other aftermarket strait through de-cat pipes? The reason I asked this is because I have a TracTive rear shock like yours and don't want to bake the seals out of it from that super hot catalyst on a hot summer day. Awesome videos and keep us posted.
The arrow pipe is a lot mellower than a straight through. At cruise at circa 70/80 mph its a lot better than the straight through. As for temps…ive done around 20k miles on the shock with zero problems from the heat from the cat.
I really enjoyed your series, outstanding job!
Thanks a bunch!
Cams do look a bit worn to me but they definitely don’t look like they have been running too hot .
I have 23 790adv 9k on it ,so far no problems I change my oil every 3k without fail. Great series of videos so useful and informative please keep us updated with the bike 👍🏍️
Thanks, I think the piston fault was a hotspot on the piston top which warped the head and eventually failed.
I have a 2023 KTM 890 Adventure and also the shop repair manual shows idle rpm 1,400rpm (+,- 50rpm), my bike idles at around 1,340rpm to 1,450rpm, and I was watching what your 890 duke engine was idling and noticed it is idling the same as my 890 engine and it seems spot on!
Thanks for the info! She seems to be running fine on the 790 ecu.
I guess due also to the 13:1 compression ratio along with that restriction from the catalytic converter on there would build a lot of back pressure to the piston chambers over time could contribute to that piston failure, and I think a de-cat would be going in the right direction to relieve some of that high heat back pressure for a cooler running engine.
Technically it lengthen's the exhaust also but there's a lot more information here fb.watch/wciXUYlP1R/
More info here... fb.watch/wckbqFd3k8/
Here too... fb.watch/wckL3KC-fM/
Does the Arrow de-cat pipe keep it not as loud as some of the other aftermarket strait through de-cat pipes? The reason I asked this is because I have a TracTive rear shock like yours and don't want to bake the seals out of it from that super hot catalyst on a hot summer day. Awesome videos and keep us posted.
The arrow pipe is a lot mellower than a straight through. At cruise at circa 70/80 mph its a lot better than the straight through. As for temps…ive done around 20k miles on the shock with zero problems from the heat from the cat.
gone thru your vid twice but did not hear you mention about the ECU ! did you fit the 890 ecu ?
No, just my standard 790 Adv ecu and loom.
Try here for the mention of the ECU...
th-cam.com/video/zFN2frQaPTw/w-d-xo.htmlsi=fDMfHGaM_9ZghuPW&t=1320