Too rich. What size jets are in it? Bikes run better when warmed up if they are lean. And the run worse when warmed up if too rich. I'll see if I can find the proper jet size. Any airbox or exhaust mods? Did you try riding it with the airbox lid off?
Allen Thomas On Apr 20, 2015 2:28 PM, "ember630" <[email protected]> wrote: > Thank you everyone for your help thus far. The bike is still belching > blue smoke when it gets warm. It gets worse as it warms up. It is > basically clear at first, but then it goes to smoke again. I will describe > what I have already done below: > > -Cleaned carbs > -replaced piston rings > -replaced engine gaskets > -replaced all seals above the gear box > -set the valve timing, > -replaced valve seals > -cleaned carbon from piston and bottom of valve area > > What am I missing? Why is there still blue smoke? please help. > > On Thursday, April 2, 2015 at 2:06:26 PM UTC-6, ember630 wrote: >> >> Hi, >> I've been reading a lot on this forum and it seems this is the place to >> be. I just cleaned the carbs on my 1984 CB450SC and got it going for the >> season to find out when I put it in gear, it burns bluish smoke from the >> exhaust and loose power when the throttle is aggressively turned. I know >> it's not the carbs, so I'm pulling the cylinder heads off tomorrow and >> checking the pistons, chambers, and rings conditions. I suspect I will >> find oil leaking into the piston area there. As I understand, it's >> probably not worth fixing if the chamber is damaged or misshaped, so I'm >> hoping it's just the piston or piston rings. DOES ANYONE KNOW WHERE I CAN >> BUY A NEW SET OF PISTON RINGS OR NEW PISTONS FOR A CB450SC? >> Thank you for your help. And if you have any other ideas about what >> could be causing the problems with my bike, I'd be very grateful for a >> response. >> thanks >> > -- > You received this message because you are subscribed to the Google Groups > "Nighthawk Motorcycle Lovers!" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/nighthawk_lovers. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/nighthawk_lovers. For more options, visit https://groups.google.com/d/optout.
