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the bottom of my pipes turned so blue? what is he reason behind that i never jetted the bike yet and rode it for a few hours ? did i casue any damage?

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I did not do it any good, but might have hurt something inside you motor. Blueing on your pipes is caused by a lean condition.

 

Type the town/citys name in a google search "(town name) elevation". Are you running it with your airbox lid off? snorkel on/off? Let us know your elevation and outside temps your going to be in.

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Here is a guide to rejet your main jets taken from BenBB's Jetting FAQ

 

Start by making sure your Banshee is clean, specifically around the carbs. Turn the petcock "off" at the tank, and disconnect the fuel line at the first carb you're rejetting (do one carb at a time so that the bowls and/or slides don't get reversed). Remove the choke hose, located between both carbs (just on the other side of the choke knob on the left carb). Disconnect the bowl overflow line at the bottom rear of the carb. Using a small phillips-head screwdriver, loosen the hose clamp on the black rubber boot at the front & rear of the carb. Push the body of the carb rearwards, compressing the airbox boot, until the front of the carb clears the front reed cage boot, then twist the front of the carb outwards and pull the carb free of the airbox boot. Stick a rag on the top of the motor right under the carb to catch any fuel that's in the float bowl. Using the same small phillips-head screwdriver, remove the four screws that hold the float bowl on (don't lose the two little metal guides for the overflow hoses). Gently remove the float bowl straight off the carb body; if it doesn't come off easily tap the sides with the end of a screwdriver, just don't pry on the gasket mating surface or pull it off at an angle. Once off, check the bowl gasket, it will usually stay stuck to the carb body but it doesn't hurt to check it for tears, or remove the gasket to clean it and the upper mating surface. After the bowl is removed, don't rest the carb on the motor, as you may bend the floats (the two roundish black plastic peices that were inside the float bowl). Right in the center of the carb body (below and between the floats) you'll see a hex-shaped brass thing: that's the main jet. Sitting around the main jet is a white plastic splash sheild, slide it off the main and note how part of it goes into the carb body; that passage is where the pilot jet sits. Use a 6mm nut driver to remove the main jet, be careful not to lose the brass washer under it. Now install the new main jet with the old washer, being careful not to overtighten the main jet. Slide the shield back over the main and into the pilot jet passage. Put the float bowl back on, tighten the four screws, make sure there's no dirt in the carb or boots, and put the carb back in the boots just opposite of how you took it out. Now do the other carb the same way, replace the choke tube and connect the fuel and overflow hoses, turn on the fuel and make sure fuel doesn't flow straight out the overflow hoses. If it does, the float valve is stuck open, just tap on the float bowls with a large screwdriver and they should close.

 

The only thing I can add is to be very careful when takeing the float bowls off (you dont want to bend the floats) and when putting the carbs back, put the front of the carb into the boot closest to the motor first its alot easyier.

 

 

Some other good jetting pages :cheers:

 

Troubleshooting Your Jetting

 

How Carburetors Work

 

What Is Jetting

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