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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Yz 85 Bog Safety Concern Help !!!!!!!!!
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[QUOTE="johnwilhite, post: 1360514, member: 36909"] Need some help really bad !!!! My son is just coming back from a broken leg. Bike has been sitting almost 3 months. Been riding it for the past 3-4 weeks. First race back is this coming weekend. While the bike was sitting I went completly through it. He locked the tranny up right before he broke his leg. I bought a complete bottom end (BRAND NEW) out of a parted out new 08 yz 85. I had to install our complete clutch and side case plus our ignition and flywheel. Put our top end, intake and carb also on it. Before, on the old engine, never have we encountered a bog the 2 years we have owned the bike. Since he has been back riding the bike (with rebuild) we have encountered a mysterious bog !!! It only happens part of the time. The first week back on the bike about the 3rd day riding it hard he was coming out of a corner in third and it just fell flat on its face for about 2 seconds and took right back off. I pulled carb and looked for debris in bowl and found nothing, checked jets and they were clean. Put back on the bike and turned him loose again. Ran great for the next week and bam, it happened again. This time bogged on a 3-4th gear straight. Pulled carb again thinking had some kind of blockage or debris. Found nothing !!! Placed back on bike and has about 2 more hrs of ride time of no bog and last night bogged on face of a double !!!! Scared the shi@ out of both of us. I am @ a loss here and need some advise on where to begin. I am thinking of messing with the float to put more fuel in bowl but I have never changed it since we have owned bike. If it was fuel level shouldn't it bog all of the time instead of periodically like its doing. I really want to get this fixed before I turn him loose racing this weekend. I am going to have him ride it again tonight and I am going to video it and hopefully it will do it and you all can hear it !!! Any advice is greatly appreciated !!!! [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Yz 85 Bog Safety Concern Help !!!!!!!!!
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