SXF 350 2017 -- loose crankshaft bolt

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3/4/2021 3:50 PM

I would like your opinions on my experience as a 2017 KTM SXF 350 owner. 82 hours of non-abusive use. Vet ride.

Last heat of the season: loud noise coming from the engine head. Total panic. I inquire: we think it is the tensioner of the timing chain.

I decide to do a full top end job. I take the opportunity to spoil myself and pimp the bike. So, the mechanic calls me to tell me that he came across something very strange. The crankshaft bolt is loose. This damaged the clutch cover.

The mechanic is investigating and it looks like this is a known issue from the model year and even documented in the MXA review.

https://motocrossactionmag.com/motocross-scuttlebutt/

My dealer who sold me the bike never communicated a technical bulletin. No reminder.

So what do I think about that ? I ask to the dealer to expose the situation to KTM Canada...


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3/4/2021 4:19 PM

Nothing Ventured Nothing Gained - Nothing Gained Nothing Lost

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Germany 1975 250 CZ Centerport, laydown shocks, mikuni with reed valve, Marzocchi forks with me as the motopilot

3/4/2021 5:36 PM

my local husky dealer doesnt know about the chain recall yet!

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3/4/2021 5:58 PM

Is there an actual recall or bulletin? What years are affected?

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Powerband in every gear !

3/4/2021 8:54 PM

I would just be glad it didn’t destroy your bike, I know of a new 21 kx250f that the clutch basket bolt backed out and wore into clutch cover and killed the bike at 19 hours. I know the 16 350 there was some that had some bolts that back out on motor.

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Thank you,
Fly Racing, WPS, Dt-1, Mika Metals, Maxima, 100%, Motostuff, Factory Connection, Evs

3/5/2021 7:15 AM

If you have it a part, make sure to replace the oil pump idler gear now!

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3/5/2021 12:00 PM

Like Tim507 said, nothing gained nothing lost. Loctite it back on to the correct torque and go on with your rebuild. Throw an aluminum oil pump gear in there and a manual timing chain tensioner and call it a day. Could've been bad but it wasnt, be happy.

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3/5/2021 12:48 PM
Edited Date/Time: 3/5/2021 12:48 PM

RockyRider wrote:

Like Tim507 said, nothing gained nothing lost. Loctite it back on to the correct torque and go on with your rebuild. Throw an ...more

Any leads on an aluminum oil pump gear? I could only find the update factory part, That thing caused a shit ton of damage.

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