Whats wrong with those tyres -a flat one again-

Eddy_V
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Eddy_V
So, i went out today for the 2nd time this year. 2nd time on nearly fresh tyres and tubes, done by a mechanic incl a new rimband and proper pressure 0.9 bar. Last run, a flat reartyre. 🤨
Last year had 5 of them flats, and had since i switched in 2014 from suzuki to ktm sxf350 (2014-2018) and husq fc450 (2019-current) a average of 8 flats per year. It annoys me. Even switched to suzuki rimlocks, but no effect.
Before, i rode a lot more, and 1-2 flats per year was normal.
Whats wrong with me?
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mattyhamz2 3/6/2021 1:44pm
3/6/2021 1:44pm
Are you tightening the nut on the valve stem down to the rim? Are you getting pinch flats? We need a little more info
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Rawly
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Rawly 3/6/2021 2:17pm
3/6/2021 2:17pm Edited Date/Time 3/6/2021 2:19pm
What terrain you riding ? Off-road or tracks ? Heavy duty tubes ? I run heavy for mx and ultra heavies for off-road. As Matty asked , are you putting the nut on your valve stem ? Don’t tighten it , leave it up near your valve cap , especially on the rear. When the tire slips on the wheel , which it will , the stem pulls away from the tube if you tighten the nut. I like the rubber stem holders that Honda uses. Chances are that with your progression of bike upgrades , you are twisting that throttle a bit more as well. Good luck. Flats suck !
2
rjg
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rjg 3/6/2021 2:50pm
3/6/2021 2:50pm
Tire pressure too low?
1
Eddy_V
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Eddy_V 3/6/2021 2:57pm
3/6/2021 2:57pm
Well, riding( when it occurs ) on mx hardpack. Had some trouble with torn out valve stems in the past, keeping the nut 1/2 inch loose from the rim.
Looks like that the rim locks dont keep the tire in place. Will tomorrow pull it apart to see whats the problem this time.

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Paw Paw 271
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Paw Paw 271 3/7/2021 1:06pm
3/7/2021 1:06pm Edited Date/Time 3/7/2021 1:07pm
Try more air pressure in tires.

Paw Paw
braaap_man
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braaap_man 3/10/2021 11:31am
3/10/2021 11:31am
First thing would be to check the rim lock and making sure the nuts are to torque (I've always been picky on torq'ing) I run Tubliss systems now with my old man and since then we've had ZERO problems with flats...might wanna check that option out too.
Skerby
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Skerby 3/10/2021 12:20pm
3/10/2021 12:20pm
KTMs used to come stock with 2 rim locks, just drill a hole 180 degrees out from your rim lock and install another. Your wheel will be more balanced to boot.
CKNY
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CKNY 3/10/2021 12:51pm
3/10/2021 12:51pm
Skerby wrote:
KTMs used to come stock with 2 rim locks, just drill a hole 180 degrees out from your rim lock and install another. Your wheel will...
KTMs used to come stock with 2 rim locks, just drill a hole 180 degrees out from your rim lock and install another. Your wheel will be more balanced to boot.
I can’t remember any of my KTM’s over the last 12 years with 2 rim locks. Maybe my memory sucks but I just don’t recall.
Skerby
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Skerby 3/11/2021 9:01am
3/11/2021 9:01am
CKNY wrote:
I can’t remember any of my KTM’s over the last 12 years with 2 rim locks. Maybe my memory sucks but I just don’t recall.
I had an 03 and an 04 125SX both had 2 rim locks.

My brother owned a 2011 250SX and it only came with one, must have switched somewhere in between.
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