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Old 07-27-2011, 07:08 PM   #3 (permalink)
Master EcoModder
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Join Date: Jan 2008
Location: Western Wisconsin
Posts: 3,904

honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
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Over sized exhaust will cause problems that could build up over time like slowly fowling your o2 sensor, also check your spark plugs (every 15,000 miles) and change them as needed with stock copper core V-power plugs.
What fluid did they put in your rebuilt transmission? it should either be motor oil (5w 30 I think is stock, 0W 30 works well) or Honda MTF, gear oil has sulpher in it that will destroy the bearings and bushings.
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