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Originally Posted by kellett5261
so your referring to this one? I do have a 670, I love it other than the constant battle with the idle on the carb and plugs . I'd like to go with a Mikuni and be done with it . I'm sure it would be Night & Day difference with the stock Junker.
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That's the one. It will be night and day difference. You'll still have to tune it to get it to idle and run perfectly. They should be able to help you with tech support also. (note: I have NOT used this kit on this engine)
One thing, that carb is going to make you want to drive faster
Be carefull not to over rev the engine or you can damage the valvetrain components. Most stock engines will safely rev up to 4000 rpm. You could install their rev kit to help prevent that and safely rev to 5000 rpm.
On the stock carb, I found this carb to be easy to tune once you remove the caps on the idle circuit screws. It takes a little patience. Mine is dialed in pretty good and surprisingly it feels like there are no dead spots or sputters.