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Husky 07 610sm hiccup

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I have an 07 Husky 610sm with a Leo Vince slip on, stock otherwise. I installed the JD jetting kit. It runs great except it hiccups from time to time when throttle is held steady at around 4600-4800 rpm, which it did before I installed the kit. Otherwise it runs great. I live in Mississippi around 500 ft above sea level. Two questions before I go back into the carb.

1. I used the #180 main jet which the instructions said to use for a "free flowing" exhaust. Would a slip on qualify as free flowing? Otherwise I am advised to use #178.

2. I used the blue needle, the richer of the two, for low altitude/cool temperature with the clip at 5th from top. I am assuming that I will play with the clip position to lean up the midrange. I have the mixture screw 2 turns out.

Is the "hiccup" the result of a too rich midrange? I wouldn't think it would be ignition in just that one place in the rpm range. If I knew for sure I wouldn't be asking the experts! Any advice will be appreciated!

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You may want to try the NGK iridium plug (CR8EIX) before making any jetting changes. The 4-5K rpm stutter at constant throttle that you described in very common on the SM/TE610. Riders have found the iridium plug typical cures this stutter or minimizes it enough to be negligible.

By the way, I have running the same exhaust setup with JD kit. My jetting is red needle (#5 notch), 180 main, 45 pilot, 2 turns out, 60 leak jet. In Fall or early Spring, I may run the blue needle if temps are cold enough.

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Thanks for the reply. I am going to change to the red needle and see about getting a CR8EIX plug. I tried to buy one awhile back but the shop had no listing of that plug. btw How do you like your CR125? I have a 2001 WR125 which is a sweet bike except I can't seem to lean the midrange out. I had a 94 also. I have a nice 06 KTM SX125 but I swear the Husky steers better.

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better or worse as the motor gets hotter?

Its been so cold I probably have not ridden it long enough to tell, but before I installed the jet kit it had the hiccup and it DID seem to do better after a long ride. One thing I left out was before the jet kit, it would not start unless I pulled the hot start button to start it cold (indicating it was too rich). I bought the bike used and the previous owner put a 185 main jet in which was way too rich. Also I forgot to say that the emissions stuff was removed before I got it. Thanks for your help! What do you think about going with the iridium plug?

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Mark

95% of the JD combos I have worked on where happier with the Red needle. If I where setting it up I always start with the float level (and can't do that by computer) but from there it would be 42 pilot, red in #4 and a 180 main. AC pump would have a strong squirt for 1 second if your an off road guy, a little longer for DS

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Thanks Dave! I wish I'd joined TT before I installed the jet kit, I might not have to go in again. It's pretty easy though - I love how you can take the whole airbox out so easily. And I thought my KTM 625 was easy to work on.....

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