huoniao hn125-8 throttle

[BrandonFawcet...]

Hi guys. My name is Brandon and I have the above motorbike but my throttle doesn't seem to work the bike starts up nicely but I get no revs. the throttle wire is connected, the pin is in the correct place and still no revs. Can you please help?
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B) brandon B)

[Riejufixing]

[Easy-X]

Yeah, easy check: take the airbox and associated bits and peek into the intake to check the slide (don't need the engine on for this.) Turn the throttle and check the slide raises. Might be a bit awkward so if you have a friend to work the throttle that would help
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Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[BrandonFawcet...]

[BrandonFawcet...]

[Riejufixing]

[Teflon-Mike]

So it was 'broke' when you started, and you put it back together the same way... still broke.

Lets change terminology.. did you put it back together 'correctly'? As in how its shown ion the work-shop manual? Hmmm...

IME if the throttle doesn't work, there's two or three ecplanations. Most common is that the throttle cable has been remnoved at the carb end and the vable HASN'T been put back on the slide 'correctly'. There';s usually two slots in the slide for the nippled cable' one that the nipple will co through to hang it, other it wont that it will lift the slide, and the cable has to be twisted or shunted side-ways for the nipple to engage. Or theres a plate for the cable that works the same way, under the slide's return sping, and the arrangement is botched so eiother the plate dont grip[ the vable or the spring misses its seat so dont push the slide down or such. Ie the carb isn;t put back together 'correctly'.. see the book.

Other one, and quite likely on a low powered Chinky 125, is that the throttle cable breaks at the twist grip end where the throttle is wamped to the stop the whole time trying to find that last n'th of possible powah. On Chink 125's poor plastic moulding in the grip tube and or grip body means that the cable doesn't need actually snap; the it may just be a bit bent, or the plastic bends... Go strip and check, and compare to the proper work-shop manual.

(I now have nasty images of a naked lad daning around a lexmoto, shouting "No, its still the same!! you know like the Ronnie Cporbet joke of chap in the shoe shop being told top try the shoes again with the tong out!!! Or maybe that's just my deranged imagination....)

But check both ends and dont rely on what it may have looked like, probably when it already didn't work; GET THE BOOK!
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My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?'

[BrandonFawcet...]

[Riejufixing]

Have you checked that the slide does in fact move up and down when you twist the throttle? That's the thing. If you aren't in a position to see into it, you could poke your finger in & give it a feel as you work the throttle back and forth.

[andy46]

Whether or not you took a photo (which is a very good idea) and believe you put everything back as you found it, the fact that it was working before you started and now isn't is strong evidence to suggest that you didn't in fact get it all back as it was.
As has already been said you need to find out if the slider is actually moving with the cable. They are quite awkward to put back properly if you removed the slider from the cable.
I would guess that this bike is fitted with a PZ26 carb, they're a common standard fit on this type of bike - the main jet needle valve is clipped inside the slider on these and can easily be dislodged when taking the slider out, without noticing you've done so. (that will stop it revving even if the slider is moving). It is possible to put the slider in the wrong way round (turned by 180 deg) but if it is, it will jam and feel jammed when you try to turn the throttle.
Look for markings on the carb to find out exactly what is fitted, PZ or other, then you can google for an exploded diagram to see exactly what goes where.

[Teflon-Mike]

[WD Forte]

Unscrew the carb top, remove slide
and work the throttle
the slide should move back and forth against the spring with the throttle

if it doesn't, check the cable and twist grip
if it does, check needle and cable nipple is correctly assembled and you put the slide back in the correct orientation.
refit and look down the back

Remove the carb to check its function if that's easier.
Taking pics, good for building a dossier on any bike
if asking advice, sharing pics even better.

Oh and discussing mechy/techy stuff is best done in the 'Workshop' section
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bikers smell of wee

[priezti]

As others have already said, check to see if your carb slide is actually moving, if I twist my throttle fully and let go I can hear the slide hitting in the carb.

if you have your standard air box on it might be a pain to actually look into the carb without taking it off. if you unscrew the top of the carb you'll be able to pull the slide out and when you move the throttle you'll be able to see the cable trying to pull the slide upwards. When you put it back in make sure it goes in the right way round, if its really awkward then just take the seat and tank off for more access.

if it doesn't move then the cable has either snapped or its come off the throttle tube, have you had your right hand switch gear apart recently?