help with new BBk ---- please!

micco · 06-20-2017, 09:43 AM

great points, again.

I switched back to the original cylinder head last night, still smokes - but i did get rid of that rattle sound. Might have been the emissions tube vibrating against the valve cover...

I reused the same plug, NGK and its black with some deposits on in.

Since its smokes right off the start, that wouldn't be the main jet i swapped, correct?

I'm really thinking its the rings, as its smoking much much more then it did at first, and the smoke has a white/blueish tint.
I didn't file the rings down during install; i read somewhere you need to...maybe my bad?

There's a tomos nitro 150cc for sale, which i might just buy, rather then spending time on this project :(

sc00ter · 06-20-2017, 11:53 AM

We have never filed rings before but know others who have. If I were to bet on what I think it is-float in carb bowl. Did you remove the bowl on the carb? If so, I bet you may have accidentally knocked the float out of adjustment. Common mistake and kinda easy to check the float height. Check the compression. That will tell you if the cylinder is at proper compression and tell you if there is a ring issue or if its something else non-compression related. Now, about the Nitro 150. You going to tag and insure it or swap the motor into your current 50cc? I have a 200cc Burgman for my main ride and play around with the 50cc for a hobby. If you tag and insure the Nitro then you can take your time and figure out the bbk kit. Learning is power, so dont give up on the bbk until you at least figure it out first. Anyways, do a compression test first and if that looks about right (info is out there, forgot what the Zuma bbk kit was) then check the float height.

06-20-2017, 11:53 AM	#2
sc00ter Join Date: May 2017 Location: Norfolk, VA Posts: 531	We have never filed rings before but know others who have. If I were to bet on what I think it is-float in carb bowl. Did you remove the bowl on the carb? If so, I bet you may have accidentally knocked the float out of adjustment. Common mistake and kinda easy to check the float height. Check the compression. That will tell you if the cylinder is at proper compression and tell you if there is a ring issue or if its something else non-compression related. Now, about the Nitro 150. You going to tag and insure it or swap the motor into your current 50cc? I have a 200cc Burgman for my main ride and play around with the 50cc for a hobby. If you tag and insure the Nitro then you can take your time and figure out the bbk kit. Learning is power, so dont give up on the bbk until you at least figure it out first. Anyways, do a compression test first and if that looks about right (info is out there, forgot what the Zuma bbk kit was) then check the float height.
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