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nah motor was a 110 to 125 upgrade so the old one is spare parts now, no point in fixin it

mate i just had very similar probs. fiddeled with carbi and valves for ages. ended up gettin a new motor to fix it cause it frigged me ova for so long. the only other thing i can think of is that i over oiled my filter or put it bac on wet and it leaked through the engine case and over the...

mine was a thread about half way along the cable under the front guard. i had to totally release it to unhook the cable off the motor and when i put it bac on i tightened it bac to what it was. somehow the two engines must be different and the cable was too tight. its gunna b easier adjusting it...

plugs in dude! nah clutch adjustment was too tight. starts like a dream, just gotta go run it in now......... got step by step pics of engine swap if anyone is interested - i aint no mechanic but it was pretty easy (other than that hiccup).

just put in a new loncin 125 into my thumpy and went to start it but nothing happened!? kick start cranks hell easy like there is no compression. any ideas? (ive dissconnected the electric start so that aint an option) is there anythin to do to the motor before hand? its almost...

ive tried everythin i can find in these forums, valves, timing, cleaned carbi, new air filter, plug, fuel, checked electrics. everytime i think its fixed it runs sweet when i ride it up the street but as soon as i get to the track it dont last 5 mins b4 it just splutters and conks at high and...

not sayin its hard. jus done it 5 times and me bike still wont run. ya cant check if its runnin rite until the caps and covers are back on. gives ya the ***** when ya adjust it n put it back together and it runs worse. like i said but it prob aint me adjustment but somin else screwing me ova.

go to bbr motorsport web page and they have a video you can watch. its a c*!t of a job to get right (or my valves or something else is rooted).

ha. like the guinea pig bit postie. might just balls out n do it too. let us know how ya go..... think my frame might be a bit diff to postie bike thats my only concern, gettin the engine on. as for the rest (cdi,carb etc.) thats just simply bolt on new sh*! till it gets going.

in same boat. 110 has been playin up and want to replace with 125. Does lifan or ducar bolt straight into 110 engine brackets, run with stock carby etc. or is it not as simple as it seems. have stock '03 thumpstar.