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• Specs & Comparison
• Riding The Beast
• Rider's Opinions
• Making It Run Right

When converting the stuffed-up stock bike to a screamer, you have to replace the small muffler tip with the larger item.

MAKING THE 650 RUN RIGHT

It would be close to a crime to leave the bike in the EPA mode. At least a misdemeanor and quite possibly a felony. Here's the drill:

• Take the rubber boot off the air box and feed it to your dog.
• Remove the plastic insert forward of the rubber piece and toss it, too.
• Take the rubber manifold holding the carb off, and replace it with a manifold with no restrictor in there. These are available from Honda dealers. The stock manifold has metal plates vulcanized into the rubber that allows a mere 21 mm opening. The correct manifold gives you a full 42 mm opening.
• Remove the stock tip from the muffler and slip on a new tip. The EPA tip is 20 mm and the good one is 40 mm. The swap is easy, as the thing is held in with three bolts.
• Rejet the carb from a 125 main jet to a 172, or 175 main jet, depending on your altitude.
• Move the needle clip from the #2 position (near the top), to the #4 position, near the bottom of the needle.
• That's it! You. ve now converted the dull EPA bike into a screamer.