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Hi all, I have done some searching but turned up with nothing. I just put a TB 88 RH kit on my 50, but I'm having some problems with the jetting, when in second gear and going wide open I have bog/hesitation for about 4 seconds or so before the bike catches up and goes. I have changed the main jet to a size smaller and played with the needle, air and idle screws, bit no dice. I have now reset the screws back to the original locations and am now seeking the help of the forum members on what I should try next to clear up this issue.
 

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Sounds like you are lean, as I have seen this on our 'china' carbs, try putting the larger jets back in, a plug read might help indicate ballpark if you are lean or rich. We have a Keihin knock off carb that ran like crap with a 74 main jet, put in a 92 main jet I had on hand and it ran mucho better. You may need to do some trial and error to get it close, then read the plug to get it dialed in.
 
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