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<blockquote data-quote="Trfsrfr" data-source="post: 212251" data-attributes="member: 3959">New update:Zach and I took the bikes to ACP today. My main objective was to make it to work on Monday, have fun, and hopefully find some help with the way it runs.There was a dude from a motorsports company there that offered to check it out for free, removed the exhaust and gave it a once-over.He said that I have a visible groove in the piston, (last time I checked compression it was (Sorry for late edit, it was/is 211 psi). He pulled the plug, and recommended to drop the needle one position, and go to the next size smaller jet to fix the sputtering on run up problem.Then he also said that there is an unusual noise from the engine, which I have heard since I've owned it, and said that it might be piston slap, or a bad bearing.What does that sound like?I took it back to the truck (ignoring the noise, like when you roll your tongue to pronounce some Spanish words) , dropped the needle to the top position, and it ran better, didn't sputter as as much, accelerated faster, but still misses on run up in the mid-section. But definitely better.We're moving into off-riding season here soon, so I'm good with a tear-down, but I am on a mission to learn as much about this thing as possible beforehand. I need to understand first.Thoughts?</blockquote>

[QUOTE="Trfsrfr, post: 212251, member: 3959"] New update: Zach and I took the bikes to ACP today. My main objective was to make it to work on Monday, have fun, and hopefully find some help with the way it runs. There was a dude from a motorsports company there that offered to check it out for free, removed the exhaust and gave it a once-over. He said that I have a visible groove in the piston, (last time I checked compression it was ([I][B]Sorry for late edit, it was/is 211 psi[/B][/I]). He pulled the plug, and recommended to drop the needle one position, and go to the next size smaller jet to fix the sputtering on run up problem. Then he also said that there is an unusual noise from the engine, which I have heard since I've owned it, and said that it might be piston slap, or a bad bearing. What does that sound like? I took it back to the truck (ignoring the noise, like when you roll your tongue to pronounce some Spanish words) , dropped the needle to the top position, and it ran better, didn't sputter as as much, accelerated faster, but still misses on run up in the mid-section. But definitely better. We're moving into off-riding season here soon, so I'm good with a tear-down, but I am on a mission to learn as much about this thing as possible beforehand. I need to understand first. Thoughts? [/QUOTE]

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