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While cleaning my carbs last weekend, I removed one needle from the piston just to see how it was held in and put it back together. The bike accelerates like new, but there is a light surge at steady throttle between 3-5K. I can accelerate out of it, but the surge is right at my cruising range around town.
Has anyone shimmed their needles? There's one washer under the needle and it would be easy to put another one there. Unfortunately, I didn't measure the stock washer for thickness, or inner or outer diameter. Putting another washer, or a thicker washer would raise the needle, but keep the piston at the same relative opening. Can washers be purchased from a hardware store? If the needle was shimmed with a thicker washer, would it cure the surging?
Has anyone shimmed their needles? There's one washer under the needle and it would be easy to put another one there. Unfortunately, I didn't measure the stock washer for thickness, or inner or outer diameter. Putting another washer, or a thicker washer would raise the needle, but keep the piston at the same relative opening. Can washers be purchased from a hardware store? If the needle was shimmed with a thicker washer, would it cure the surging?