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/126318
Harleye run stronger ',w it h Manl,y Ri$Jons· ~ f"¥<" -Ii -< ~ and Manley rings, and Manley valve., and ••• When it comes to performance engine components for Harley-Davidsons, there 's only one name to remember - MANLEY! Precision engineering and years of racing exper ience are combined in every Manley product to produce maximum performance and durab ility. Manley·pistons for Sportster 1000's are forged 'from a special high silicon aluminum alloy. This extraordinary metal is formed into pistons with a unique skirt design and special profile to provide scu ff-free operation and keep the rings perpendicular to the cylinder wall. Manley's dome des ign has proven particularly effective in promoting maximum compression and flame propaqation for optimum power and performance. Precisely located valve notches ' provide adequate clearance for valve lifts to .600" without addit ional flyculting of ,the piston. Yet, Manley pistons are up to 100 grams lighter than competitive brands. ngster The same year, then - l Svyear-old Spencer won the AMA Amateur 125 GP Championship at Daytona , the fin al event 01 a year-long, seminational ser ies. Mamola , with a club championship earned in on e of 50 states, received the publicity. Spencer, with the close st thing to the non existent " na tional title." wasn't even heard of. But with his current fan c1ub's distorted claims , Spencer's promotional backing seems to be approaching the style of Doyle 's Mamola operation in its he yda y. Both Mamola and Spencer are excellent rid ers . Both havebeen the objects of " m ed ia hype " by " benefactors" and organizations be yond their con tro l. And according to Spencer, he has received m oney from his fan clu b's t-shirt sales on ly a few times , and has in fact suggested tha t the WERA keep the money in stead of send ing it to him . Spencer plans to race all the AMA Novice even ts and as many club road ra ces and AMA professional di rt track events as he can during the rest of 1978 . Freddie's TZ250 novice and GS I 000 Superbike road racers are sponsored by his fa th er (wh o manages a grocery store in Lou isiana), Amzoi l Lubricants, Lubri-Lon teflon gasoline additive, his brother Danny's Suzuki dealership (located near Dallas , T exas), and Bassani exhaust systems . His short track effort is sponsored by Bultaco International, the U .S . Bultaco distributor. Spencer attends a private Christian high school in Shreveport and keeps most of his trophies in boxes in the family garage. Besides his , Suzukidealer brother, he has an older sister, Linda! r -. " , I (: ,. , I ""f I' ... .. " . j Manley' piston rlngs for Harley-Davidsons are something special, tool Plasma sprayed, moly top ring tea tures radiused face for constant wall contact and maximum sealing power. Reverse twist and taper face finish of the second ring Ins ure improved oil scraping under all conditions. Both the top ring and secarid rings are delivered .005" oversize and require fife fitting. This allows the en'gine builder to custom tailor end gaps for greater sealing and improved performance. The oil ring, is comprised of a low tension stainless steel expander with two chrome rails. This combination provides excellent 011 control without excess friction. As an extra measure of durability, ' each valve tip is hardened (RC 50) to prevent pounding and distortion by the cam follower. A lull llne-up of related valve train components from Mantey is also available to increase the performance and reliability of any Harley, Included in this group of , hard·ta-find pieces are adjustable push rods; valve springs, valve guides , valve collars (titanium or aluminum available) and locks. Manley performance products aren 't Just for HarleyDavidsons. High quality valve train components are also available for Honda , 750, Kawasaki 1000.900. and 650, and Suzuki 750. Performance bccsting products, such as camshafts, stainless steel valves. valve gUides, and ~alve springs. Call or . write today for " specific engine ~, applications. .- Manley valves -for Harley-Davidsons are the icing on the cake . Competition-proved Manley valves feature one-piece sta inless steel construction and full stress relief to insure maximum strength and reliability. To help any H-D engine reach Its full horsepower potential, the chromed stem and swirl polished head of each Manley valve insure maximum flow at all engine speeds. Increase sales this week! Call or write today for information on "Advertising That Works.", To or der IUSI ch ec k the Item anu COlor oesueo. []el St yle Tan k [ ] SuZUk l Style Tank _ [Icz A lrb OIl . OWhtt e 0 Rt"'d OB1ue El v enow Ptasuc _ _ White onty' [ ] MX Front Fender $1995 wmte on'ty (Fits Su zu kI . Yamaha , Ho nda . 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