I'll admit I was really keen to go down the bolt up horsepower route but the prospect of self loathing has ended my Derbi cup aspirations. So its the been done 20 years ago KE/RG100 for me. I'm going to add axillary exhaust ports without welding so will be interesting to see if it can hold together, will also re-work the transfers. I figure 28 reliable horsepower will be a reasonable target, watch this space.
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