Honda CBR125 repsol. Switch on and revs go mad?
Bike wasn't starting so changed spark plug and charged battery. Now she starts. BUT soon as you fire her up the revs goes full blast. Throttle isn't stuck i know that much, what else can it be?
Is the choke being used? Have you checked the slider in the carb to see if it moves up and down? Has any carb work been done? If so it may be possible that the slider is in the carb barrel backwards, there's an arch shaped groove on the slider that should face out toward the air box.
Choke does get used. No carb work been done to my knowledge. Bike was working fine for months but after it got blown over in the wind I took it inside. Then now (about 3 months) it didn't start like i mentioned I changed the spark plug then this instant and constant full revs happen.
When pulling back on throttle you can see the thing on the side of the carb working fine, it doesn't stick in full throttle position.
I don't thing id be comfortable attempting to remove the carb ill forget or put the hoses back on wrong or somthing.
Fell over? One thing to check is mounting for carb on cylinder head- a loose bolt/nut on stud will allow extra air into combustion chamber and with some choke that means in effect a wide open throttle and leaned mixture at times. See if carb wiggles with a bit of stiff finger side pressure, up/down. If there's a small port for oil vapor recovery on manifolding that has lost it's tube, then again extra air gets to combustion chamber and high RPM. Emissions tubes can be knocked off at manifold are or at other end like top of valve cover- tube slid off but hanging on top motormount wil let in some extra air. Cable ends and idle stop screw for throttle linkage something to check just in case.
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