wrighty1982

new member with honda cb125s / 65.5mm big bore kit

6 posts in this topic

Hi everyone I'm mark from England iv just recently restored a 1975 cb125S...

FROM THIS

20160428_111142_1.jpg

TO THIS

20160630_195215_1.jpg

20160630_195102.jpg

However I'm having running problems. The bike starts but runs like rubbish pops bangs misfires through carb etc etc. The engine is a cb125s with a 65.5mm barrel and piston

20160602_100942_1.jpg

And I'm using a mikuni copy 28mm carb with a 105 main jet and 38 pilot with 2.5 turns out of the mixture screw.. the engine ignition/cam and points setting's are set to factory settings...

I'm struggling to get the bike running nice and safe and would like some advice if I'm using the right size carb for the barrel etc etc any help would be great..

Some youtube links of here running .. please copy and paste..

https://youtu.be/FfKUOg4yb-Y

https://youtu.be/DxH7tWINv7Y

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It is going to run horribly with no muffler. It won't idle right if at all and have no low end power.

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