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Originally Posted by Griffiss
I looked at the Kury before I bought the Gerolomy, and everything I read except kury said it was to big for any thing less than a 120+ engine. I like the Gerolomy with the 4.83 injectors, after opening the the butterfly slightly it runs and starts like a dream, and the more I ride the better it gets. I haven't gotten in it really hard yet as it's scares me, it is running very well. It is very smooth at low rpm's and has plenty up top
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Nothing like a bike which starts when it ought to. My engine has the stock TB on it now and it runs and tunes like a champ. No variation for several months. But HP is limited to about 112 or so.
Mike Roland, I heard, posted some tests using the 57mm on "smaller" CI engines and reportedly found no detriment. I don't know how small he went, though. I heard he posted it on HTT forum, but I have not seen it. I agree that bigger is not better if you don't need bigger. I was pushing more than 120 hp with 6.1 gps @ 58 psi injectors until I "taco-ed" the 57mm butterfly. I am leaning towards the BCG dual plenum, but I see a few 124 ci engines running single plenum TBs (Zippers TB in most cases and a few Kury) without the problems I had. If I had my druthers, it would be a stock TB at about 54mm, but it does not exist to my information especially at 1.8" manifold port. So, when the new Kury 57mm comes in, it is either sell it and buy the BCG or try it again and see if the first one I had was sold to me with a broken butterfly/throttle shaft. If I had no curiosity, I might not have any problems at all ....................... and I could hang curtains for fun.
STB
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