cold start problem on 125 4t

[oatesmx]

hey guys,
a while ago i purchased a Chinese 125 crosser, 4 stroke, i know it was stupid but i have an rm125 and just wanted a little mess around bike that was quite, i got it for £100 pound as well, but anyway, it has a serious problem staring from cold, the carb is perfect (is clean) and i have just put a knew plug in it, as well as fresh juice, any one got any ideas on what i could do to get it starting without 50kicks??? also it has had red x ran through its system, cheers guys
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if it doesn't smoke, it's a joke... 2stroke for life bitch!!!

[N cee thirty]

air filter ?

valveS?
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'00 Aprilia RS50 > '92 Honda CG > '99 Yamaha Fazer > '91 Yamaha RXS > '79 Suzuki X5 > 01' Honda Cg > 07' Honda Cg > 82' Kawasaki Z200 > suzuki gsxr 400 gk73a > honda vfr 400 NC30 Mod 2 Passed 09/06/2011

Jewlio Iglesias wrote: I actually did vote BNP once

[cb1rocket]

er choke working................?

[stirlinggaz]

hi,
have you had the carb off?
fwiw, i have owned a few chinese bikes & they all seem to have those cheap nasty carbs. (which are supposed be copies of mikuni's)
no harm in taking it off & cleaning it.
some of them have that strange "enrichening circuit device" which looks like a little hammer thing, & is controlled by the throttle & is supposed to inject a fine spray of fuel when the throttle is opened up wide but they always seem to be set up incredibly rich.(its only supposed to come into play at WOT, but if its too tight, it causes all sorts of problems)
iirc, loosening of the adjuster nut sorts it out, but tbh most of these carbs are ditched for a decent mikuni carb, usually 29mm, which is far easier to set up & actually makes the bike perform better & with an open air filter fitted, makes the bike go that little bit faster.
which spark plug are you using? & what is stamped onto the carb body?
cheers,
GAZ

[Glenben92]

check mixture? check for an air leak / cross threaded plug / split in manifold rubber or cracked exhaust ports. clean the air filter. If it's got an auto-choke it WILL most likely be that. Make sure you know for definite which way the choke operated if it's manual because on some of these bikes they're upside down compared to most setups. also check the valve clearances are roughly right
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57 Huoniao HN125-8 - , 97 Kawasaki GPZ500S -
99 Yamaha FZS 600 -
Mod 2 Passed - 01/10/2010