Bruce’s two-stroke restora­tion is turning into an ob­ses­sion

Motorcycle News (UK) - - Garage -

Did I say this wasn’t go­ing to be a nut-and-bolt restora­tion? I might’ve been kid­ding my­self. Hav­ing stripped the SDR down, I found my­self box­ing up var­i­ous chas­sis parts, such as wheels, sub­frames and brack­ets, and tak­ing them off to my lo­cal pow­der­coaters for re­fin­ish­ing. When they re­turned it was like the past 30 years had been rolled away, as they looked just like new. This started a bit of a chain re­ac­tion; the freshly pow­der­coated parts only served to high­light just how scabby some of the metal bolts and fas­ten­ers had be­come.

It was by chance that I then stum­bled across a chap called Mike, who runs Mike’s Pol­ish­ing Shop in Bris­tol (0117 939 5372). He can re­fin­ish old nuts and bolts to the de­sired spec, and re­pair any dam­age, so I sent him all of the en­gine bolts, wheel spin­dles and spac­ers, fork caps, and much more. When they came back every­thing was just like Yamaha has made them 30 years ago. Mike charged £80 for this ser­vice; a bar­gain when you con­sider that a lot of the parts he plated are no longer available.

While the chas­sis parts were away, I turned my at­ten­tion to the en­gine. I man­aged to source many of the re­quired re-build bits di­rect from Yamaha as orig­i­nal parts, but there seemed to be no avail­abil­ity of a pis­ton and con­rod. So I en­gaged the ser­vices of an old mate, Roland from Hard­core Rac­ing (www.mo­tocross­di­rect.co.uk). He was able to mea­sure up the orig­i­nal con­rod and pis­ton and lo­cate suit­able pat­tern re­place­ments. Roland also of­fers an aquablast­ing ser­vice, which is ideal for clean­ing alu­minium parts, so I left pretty much all of the en­gine with him for a few days. On col­lec­tion it was like he had worked a mir­a­cle! The crankcases, side­cases, and cov­ers looked like new. Hard­core had even taken care of the cylin­der and re­bored it, and the crank had been fully re­built with a new con­rod kit.

With a free week­end, I ea­gerly bolted the en­gine back to­gether and re­fit­ted it in the chas­sis. With its freshly re­stored com­po­nents, the SDR’S start­ing to look pretty tasty. Now all I need to do is source some clip-on han­dle­bars to re­place the non-standard flat bars the bike came with, and de­cide what colour I’m go­ing to spray it.

Bruce’s nuts were in a sorry state The re­sults from Mike’s Pol­ish­ing Shop were im­pres­sive And it was only sup­posed to be a quick spruce up

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