Padgetts F1 RG500

Mark Phillips on the Padgetts F1 RG500. It was built by Padgetts Motorcyles. It has a Harris RGB500 frame and a modified RG500 Gamma street engine with Padgetts dry clutch and RGB ignition and carbs. Phillips won the 1986 British TT F1 title on this bike. When Suzuki launched its RG500 road bike in 1985 Padgetts converted the road engine into a full GP-spec RG and Phillips thrashed the heavier four-strokes. “The bike handled so well and was so light,” says Phillips. “In fact the TT F1 RG was lighter than the GP bike, because the road engine was based on the smaller factory XR45 engine.” 

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Padgetts F1 RG500

Mark Philips and the F1 RG500

I found a great article on the Interweb about Mark Philips and the Suzuki F1 RG500 Gamma.
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Mark Philips and the F1 RG500