OK, the ID isn't any bigger, just the OD. I have a 4-1 for a 550 I'd like to use on the 650 project.... MAybe. Got another idea I'm thinking about too.....
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Here's the thread from Don that covers it all...
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Ok, well after much more time and money than I would have liked, I finally got the new 550/673 out for it's maiden run today. After initial fire and warm up, she idles pretty good. I have a slight hanging idle that I will need to address but it's very minor. I also noticed I have one of the header junctions leaking. Or at least that's what it sounds like. I didn't have the GSXR gaskets recommended by Suzuki_Don so I had to use the smaller 550 gaskets while the larger ones are on order.
She ran real well under partial throttle but would not rev under full 2/3 to full throttle. I did go up on the main, again following Suzuki_Don's advice. But, with the new K&N's it feels like I'm still too lean. It doesn't bog but rather sputters and doesn't want to rev or make power so that tells me I'm lean I believe.
But, even at 1/4 to 1/2 throttle, it still feels a lot more powerful than the 550 did. Looks like I need to order the 650G Dynojet Stage 3 kit. I think having the modified needle will be a necessity as well. Can't wait to feel her above 5K rpm and WOT!
Here's hoping that Winter doesn't get here early!Comment
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