Posts: 7
Joined: 3/15/2018
Location: Umatilla, FL USA
My buddys 97 yz125 with 144 kit has a un-normal bog/studder at low end, and we just cant seem to figure it out carb is spotless compression is 175psi powervalve is working properly running 40-1 premix gas good spark stator is fine fires first kick, just cant get any power out of it unless the bike is absolutly screaming, i know someone is gunna say (its just a 2 stroke) but my rm125 with the same 144 kit is a night and day difference, any ideas?
Posts: 4117
Joined: 6/30/2014
Location: New York, NY USA
Reeds, left side crank seal, pilot to small, I always pull off the fuel tank vent hose first
This is all assuming a lean bog
If you like uncle tony's meatballs, you'll love his sausage
Now that's Italian
Posts: 653
Joined: 4/9/2013
Location: Fairmont, MN USA
Reeds are chipped or not shutting all the way? Pull air filter off if you run it and fuel entering the box reeds are bad.
Posts: 1957
Joined: 8/17/2006
Location: Delmar, DE USA
Posts: 7
Joined: 3/15/2018
Location: Umatilla, FL USA
Posts: 1957
Joined: 8/17/2006
Location: Delmar, DE USA
yeah, that would be the first thing I would try. Lower the clip on the needle. May need to go 2 clip positions if its bogging that bad.
Posts: 5830
Joined: 1/15/2013
Location: Anchorage, AK USA
