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Old 06-11-2013, 11:05 AM
crassius crassius is offline
Motorized Bicycle Elite Member
Join Date: Sep 2012
Location: USA
Posts: 2,784
Default Re: She Just Ain't Climbing Like She Used To - Standard China Girl 66cc

there is a small catalytic converter on these welded to the inlet pipe about 2 inches down from the top (just below the upper weld on the outside cover)

this has a fine mesh that can coke up

now that they are welded rather than bolted together it isn't really worth the effort to try to drill up into that area

you could, however try drilling SMALL holes in the lower cap to see if you can relieve some pressure without getting too noisy - try one hole then two and so on
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