1975 Honda CB360t running choppy.

[TheRyanAbrams]

Howdy guys,

New to the forum, first post. Appreciate any help or recommendations y'all can give.

So my bike started runnin choppy and I was advised to check the spark plugs. Found the right plug to be black, not shiny, while the left plug looks great. Replaced both plugs, ran fine for a minute than started runnin choppy again. Same issue; right plug is black again. Tried adjusting the mix per instructions I found online.

1) Couldn't get my bike to idle at 1200rpm as advised.
2) Adjusting mix screws past 1.5 turns didn't rev the engine any like apparently it should.
3) Noticed white smoke coming out of the breather tube.

If anyone has ever dealt with this before and has any clues, I'd love any help you can give.

Thanks!

 

[trek97]

One reason for a single black plug. The slide cant lift. Making that side rich cause she cant get no air and sucks fuel through the jets like a drinking straw.

If a slide is not lifting...she will idle and ride at lower rpm just fine...(under 2000rpm or so)

Check for holes in diaphragms.
Or a stuck slide.
Or the slide has rotated in the diaphragm and the 2 slide vent holes are facing the wrong orientation. Check to ensure the 2 slide vents are towards the FILTER side/not engine side.

While you got the carbs off the bike...Clean all brass and passages. Ensure floats are free and adj. Check everything for vacuum leaks.

Its not white smoke. Its steam. Boiling water condensation out of the oil. Normal for this chilly/damp time of year.

Report back and Welcome to DTT.