PDA

View Full Version : 2stroke problem


Honda250XRacer
08-02-2003, 02:08 PM
ok i have this 87 YZ125 it was just rebuilt it acts like it dont have power and it misses when you have it up and ready to shift ANYONE GOT ANY IDEAS WHATS WRONG????
NTPracing22
08-02-2003, 02:19 PM
yz=yamaha!

honestly though-start by checking your jetting. then your air screw, and maybe raise the needle a little.
dariusld
08-03-2003, 04:38 AM
It's probably not this, but is it a brand new spark plug and how does it look?
Honda250XRacer
08-03-2003, 03:55 PM
the spark plug was all black and had alot of carbon id say its running rich but i dont know if thats the cause of this problem though ...
Fuchs42
08-03-2003, 03:57 PM
theres a little thingy on top the motor i forget what it is but i know why does it have like no power at all, its not your jetting my friend had this problem but i forget what it was it was something small! powervalve or something?
NTPracing22
08-04-2003, 02:45 AM
i wouldn't know anything about dirtbike powervalves...but good luck. lol
MotoLappa
08-04-2003, 02:56 PM
Does the bike run fine untill you open really rev it up? If the YZ was just rebuilt make sure the power valve was hooked up and installed properly. Also make sure the valve was cleaned. The second thing I might check would be the reeds. Maybe a chipped or cracked reed. I would have to guess powervalve though.
tants
08-04-2003, 03:46 PM
mabe your clutch is slipping? :confused:
Honda250XRacer
08-04-2003, 04:00 PM
nah the clutch isnt slipping , so what should i do if its the power valve ???...and i have new reeds on the way ...thanks for all this help
08-04-2003, 10:47 PM
sounds rich...& the powervalves work best when they are real clean