Unexplainable loss of mid range in a 125

noobi

New member
What reasonable explanations are there for a sudden loss of mid range power.
it started last Sunday when the bike wouldn't run properly, it was either throttle wide open or idle. nothing in between. just burbling, i changed the plug, same problem. i checked for blocked jets, same problem, i dropped all the fuel and rinsed tank and carb with meths to disprove water, same problem
. cleaned air filter, same problem. replaced fuel with different fuel/oil mix. same problem

the only thing i can think of is reeds, but i cant check them because the reed block is bolted is with a bolt with no head
the pipe is cracked but its been like that for a while and the loss of mid range is new

I'm going to get the pipe welded and the muffler re packed.

the jetting was fine last summer.
 
Other people on the forum have had the same set of symptoms and the problem ended up being trash blocking one of the carb jets.
 
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