Question about 1996 Honda V-Twin Magna

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My Magna idles well. Carbs are clean and pretty

My Magna idles well. Carbs are clean and pretty well balanced. Before the re-build the carburetion was spot-on all the way to redline. 140kph+. Now it won't pull in the top two gears. 5th gear is good for only about 110kph with no power. Seems like it's not getting enough gas at the top end. How to I enrich the mixture at the mid-range/top end? This is on a vt250 by the way.

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Before you go changing jets make sure your factory air screw setting was not changed and has the correct amount of turns out from seated position. Second check for intake leaks at the carburetor joints/manifolds
( with the bike running spray WD40 around the carb joints and if the engine changes rpm's there is an intake leak replace carb joint,gaskets or o-rings depending on your model.

Posted on May 11, 2010

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My Magna idles well. Carbs are clean and pretty well balanced. Before the re-build, the carburetion was spot-on, all the way to redline. 140kph+. Now, it won't pull in the top two gears. 5th gear is...


You can't enrich the mixture to suit the mid range only .One thing you can try is to up grade on your main jets ,but this will alter your air intake volume and the air will have to be adjusted to take in the extra fuel ,if you take this route then you will need to get hold of a carb balancer kit .But one askes the question what has been done or not done to change the engines performance ?.Have you tried running without the air cleaner unit fitted to see if this improoves the bikes performance .If you find that the engines performance is better then its possibly an air intake problem .

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