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545
Joined
4/7/2010
Location
Newark, OH
US
yamahaha131
5/31/2018 7:15pm
5/31/2018 7:15pm
Edited Date/Time
6/1/2018 7:15am
Borrowing a buddy’s bike for a 2t shoutout but he told me his last ride it started running rough out of nowhere. No change was made to the bike. At idle it Revs up fine but riding it under a load it spudders/ flutters low to mid until you get into the powerband/top end. I’ve cleaned main/ pilot jet. Carb bowl didn’t have dirt or anything in it and it stills runs poor. I pulled the vforce reeds which seem tight but have slightly chewed up corners. Is this enough to cause it to run poorly? (See photos below) I am no mechanic but going over the basics. I’ve been on 4 strokes most of my racing life and fuel injection for 5-6 years with limited carb knowledge. Thanks for any input.
Have you checked the float height? A lot of times the tabs get bent and will cause the float to sit either to low or too high which will drastically change the performance.
Grab a set of digital calipers, they're good for just about anything from working on motorcycles to measuring stuff around the house. These bad boys are only $17 on Amazon, if you don't have prime, shoot me the $17 via PayPal and I'll buy em and ship em to your house for you.
https://www.amazon.com/Neiko-01407A-Electronic-Millimeter-Conversion/dp…
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