How many hours are you getting out of your 125 before a rebuild?
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125 hours
Posts: 140
Joined: 10/10/2016
Location: Bangor, PA USA
Posts: 6705
Joined: 11/30/2013
Location: Portland/Los Angeles, CA USA
On my 16 KTM 125 I’ve been changing at 20-25 and the piston still has a good amount of coating left on it.
It’s pretty easy and cheap to swap them so I think 25 is safe. My bottom end was rebuilt at 90 hours.
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Posts: 1800
Joined: 10/5/2017
Location: Bradenton, FL USA
I'm doing 10-15 on my 16 125s and 150s. That's dads choice not mine.
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Unleaded tastes a little tangy. Supreme is kinda sour, and diesel tastes pretty good.
Posts: 140
Joined: 10/10/2016
Location: Bangor, PA USA
CarlinoJoeVideo wrote:
On my 16 KTM 125 I’ve been changing at 20-25 and the piston still has a good amount of coating left on it.
It’s pretty easy and cheap to swap them so I think 25 is safe. My bottom end was rebuilt at 90 hours.
Are you riding tracks? I ride mine pretty hard I’ll be happy to get 20hrs out of it.
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Posts: 1722
Joined: 12/14/2010
Location: Temecula, CA USA
All motocross hours (screaming the piss out of it), 15-20 hours between top ends. Clutch fibers ever 30 hours or less if it starts slipping.
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Posts: 6705
Joined: 11/30/2013
Location: Portland/Los Angeles, CA USA
CarlinoJoeVideo wrote:
On my 16 KTM 125 I’ve been changing at 20-25 and the piston still has a good amount of coating left on it.
It’s pretty easy and cheap to swap them so I think 25 is safe. My bottom end was rebuilt at 90 hours.Dcross829 wrote:
Are you riding tracks? I ride mine pretty hard I’ll be happy to get 20hrs out of it.
Yes, riding tracks. Jetting and squish are on the safe side. Maybe too safe? I’m running 50/50 91 pump gas and C12. She feels like a raped ape!
The KTM guys said they have seen stock pistons go easy 40 hours. (Not that I’d do that, but they have done it).
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Posts: 6705
Joined: 11/30/2013
Location: Portland/Los Angeles, CA USA
These all have about 20 hours on them. I just rebuilt my engine from the bottom up and have 10 hours on her. I’ll check the compression at 20 again and see how she’s doing.
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Joined: 1/4/2014
Location: AUS
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