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Dirt Bike Discussions By Brand
KTM MX & Off-Road Dirt Bikes
525 and maybe the 450's jetting problems
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[QUOTE="JC Soto, post: 453723, member: 35291"] Katoum, In my carb nighmare, I had to disassemble the midsection and remove the slide/needle guide (held by 2 screws in the under side of the mid section - section is not shown on the parts catalog). I found that the PJ hole went through these two sections (the midsection and the guide), but in my case the hole in the guide was not aligned and the gaskets were not seated properly. I reassembled and noticed that I did get a response in the idling by changing the PJ's, but nothing significant until I used a 55PJ at 1 3/4 turns on the FS. This was a big improvement, but it is still wrong. These bikes should run with a 42 or 45, KTM is even bragging that they improved this circuit in the carb! Even with this compromise, the bike would run "lean" at idling or when barely twisting the throttle (less than 1/8 throttle). So, being anal about it, I re-disassembled the carb again, but this time it got worse. This might be an indication that there could be an air leak somewhere in there. Maybe the gaskets are shot. Anyway, I gave up and sent it to the dealer. I paid for a working new bike, and after more than 40 hours dicking with it, I give up. Let them repair it or KTM replace it. After all it is a very expensive new bike. Let me know if you need any help. JC [/QUOTE]
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Dirt Bike Discussions By Brand
KTM MX & Off-Road Dirt Bikes
525 and maybe the 450's jetting problems
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