Another local guy (Paignton) I knew a few years ago with an MC18, had gearing similar to this. It would just pull and pull and pull. Like you say, his 1st gear was the limiting factor in the end, and eventually he settled for 15/38.
His MC18 had been bought at an official Honda dealer in Canada, then shipped to the UK when he moved here. It came from Honda with the HRC delimiter already fitted, but apart from that (and a Gull-Arm that he fitted), it was stock as far as I know.
So, you are not alone!
Are you back with the stock pipes now, or did you find a solution with the TYGA's?
Andy.
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