I have 138 mains, shimmed the stock needle 0.5mm and 35 pilot jets. I was going to buy 38 pilots until I realised the difference in hole size is only 0.0012" on the diameter. I will give it a go. I have stock mufflers. I intend the get the Ramair foam filters but need to measure up when I finally fit the carbs. Life is in the way presently. Thank you.I’m also in Uk, all jets available from Allen’s performance midlands, I’m sure I have the part numbers for the jets I used somewhere in my garage
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