Cycle News is a weekly magazine that covers all aspects of motorcycling including Supercross, Motocross and MotoGP as well as new motorcycles
Issue link: https://magazine.cyclenews.com/i/126818
~ e l.!) 00 O'l ....... ....... ~ C':l ~ Ronda R57500 dirt trackers Follow the leader-. Cha nd le r 's bi ke features Kosman wheels fore and aft, a C&J c hassis /swingarm combination and SuperTrapp exhaust system. By Gary Van Voorhis The switch is on. O f the 43 riders entered at the Apri l 13 Camel Pro Series Sacram en to Mile Na tional , n ine - n ot counting the inj ured R icky G raha m were Honda R S750D powered . Of those n ine, eight raced th e H arley- David son XR 750 totall y or partia lly last year. H onda' s wi n - Grimeca rea r brake ca lipers and master cylinder are used . Howerton Racing Products fabricates the o il tank. ning nine of the I I m ile Na tiona ls - wi th eig h t goi ng to th e factory bi kes of Gra ha m an d Bubba Sho ben p lus one to privateer T ed Bood y made for a good selli ng p o int. Honda se lls th e R S750D, a 749cc a ir-coo led , SO HC, fou r-val ves-percyli n der , 45° V-t w in for $8500. It co me s minus the ig ni tio n , ca r bu retors a n d exha ust p ipes. Gary SCOIl, who boug ht the engine fro m Shobert 's factory bike a fter Shobert fin ished seco nd in the season -ending A Honda oi l cooler is mounted on the right downtube. Spri ngfield Mile National, got th e ig ni tion as a bonus. Anyone wh o buys an engine gets a list o f so u rces for chassis, pans, whee ls, oi l tan k, a nd ex ha us t system , along wit h a ser vice manual, pans lists. a pans p ri ce list and pans orderi ng in forma tion. For more info rm a tion , ca ll Keith Reeves a t 2 13/32 1-8680. The three bik es show n here a re represent at ive o f what was seen a t Sacra me nto. *** The Showa rear shock uses a remote reservoir. A Showa fork is used. Mikuni 40mm f lat slide carburetors m ix the gas. Do u g C h a n dler a n d R andy Goss' Fred d ie S pe n ce r /Supe rTrapp Racing's bi kes are a bo u t as close to being factory bi kes wi thout factory back in g as you ca n get. Ma n y o f th e a fterma rket items used a re those listed on Honda 's RS750D ven dor sheet. However, bo th the factory Showa fo rk a nd Showa si ngle shock unit a re used - a va ilabl e from H onda fo r $2600 a nd $450, resp ect ivel y - as we ll as a fac tory gas tan k and oil cooler. T he rea r brak e is a G ri meca - 24 ca liper mat ed to Kosm an Specia lt ies fabrica ted han g ing bracke ts, hub a nd di sc. A G rimeca m aster cylinder is used . Bu il der ltun er J err y G riffi th repl aced the H onda camshafts wi th ones fro m Megacycle. Griffi th , u nt il he a nd H onda pa n ed co mpany a t th e end o f last season , had been wi th H onda 's di rt track program fro m the ti me of the ini tial effo rt u ti li zi n g th e C X500 -based engi ne , to the bu ilt -for- racing RS750D introd uce d last year.