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engine won't rev and smokes

Posted: Fri Jul 24, 2015 6:53 am
by fajes
hey,

it's been a while since I've been here!
so it was also a while since I've ridden my S2. when I tried to get her going again she'd go for 100mtrs and die, as in rev drops and dies. checked the carb (22 jetex), cleaned the jets, replaced the fueltab with a new fast flow tab,... tried again, yes she starts, idles, runs! but yet again she ran 100mtrs and the same thing happens...
there's also a lot more smoke than normal.
any suggestions?

since it's been a while: the engine is a standard 1960 Li150 with a GP150 kit, elec ignition and Jetex carb. I used to commute on it, but the last few years it's only been used for the occasional little ride around town.

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 7:13 am
by coaster
I've had a very similar issue which was down to a faulty plug

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 7:18 am
by fajes
that would be a simple solution, I'll try it after I finish work.

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 7:43 am
by mick1
change the fuel......

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 7:44 am
by fajes
the fuel was changed when I replaced the fuel tab.

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 8:24 am
by Timbo
Stater breaking down....

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 8:31 am
by bristolmod
semi blocked jet or passageway in carb

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 9:18 am
by fajes
hmmm, I cleaned out the carb and jets.

I do have quite a lot of spit back in the airfilter rubber.

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 12:05 pm
by DigDug
Breather hole in petrol cap blocked?

Re: engine won't rev and smokes

Posted: Fri Jul 24, 2015 3:41 pm
by HxPaul
You say it smokes a lot,is it white smoke,if so it could be your main drive seal thats failed causing your spark plug to become fouled.