" There is no replacement for displacement ," says Californian aftermarket performance and race guru Chris Rivas and , exclusive to HardDrive , his Rocket Cams ' program now includes new high quality and durable cylinder and piston big bore kits . The cylinders are cast from premium materials and perfectly fitted and matched to its paired up Wiseco
pistons sets . Rocket Cams cylinders come powdercoated textured black with machined fins for a perfect blend to an OE Harley motor . " All kits come with Cometic head and base gaskets and are ready for install . This ultimate combination of industry-leading manufacturers and experienced racers will bring bolt on horsepower to a new level ," says HardDrive V-twin Director Krys Brown . The M-8 128 " cylinder kit brings stock M-8 114 " and 117 " motors up to 128 " with 4.5 " stroke and 11:1 compression . The kit includes Wiseco forged pistons with coated skirts and . 040 head gasket set . The M-8 124 " kit brings stock 107 inchers up to 124 " ( 4.375 " stroke and 11:1 compression ) and the 110 " Twin Cam kit brings stock ' 07- ' 16 96 " and 103 " motors to 110 ". Also from Rocket Cams , HardDrive also offers cams , with and without EZ-Start , pushrods , lifters , valve spring kits and cam install kits . Chris Rivas and his crew at Chris Rivas V-Twin at Fresno , California , have many race successes to their credit - not least on the drag strips of the United States . But as avid Bonneville Land Speed Record chasers , did you know that they are also responsible for the world ' s fastest ever Bagger at over 200 mph and fastest ever Dyna at over 244 mph ? How ' s that
Oversized and Tapered Tracker Bars
Oversized and tapered 1-1 / 8 inch dirt bike style handlebars are common on lightweight dirt bikes and many European and Japanese sport machines . They have now become very popular on highperformance Harleys , migrating to high-performance Dynas and other platforms ( especially Sportsters ), and with good reason - they look great and encourage a riding stance that can improve rider control over the handling issues that all those ponies can create . " However , construction shortcomings have limited their function and appeal ," says Biltwell co-founder Bill Bryant . " Unfortunately , the aluminum material used to make tapered bars is not ideal for big twin bar construction . " Unlike steel , which bends or cracks before breaking , aluminum can fail without warning , especially when subjected to the stress of controlling a 600-pound motorcycle . One great way to improve the strength of aluminum handlebars is to increase their wall thickness . Unfortunately , this isn ' t possible with modern Harleys because the resultant small inside diameter would make TBW module fitment impossible . " Our Tracker OS bars taper to 1 " at the ends and the tapered and butted 4130 chromoly we use solves all these problems . We employ advanced tube tapering and CNC bending technologies to ensure every Biltwell Tracker OS bar is stronger than
stock and straight as an arrow . CNC slotting and notching lets you install throttle modules easily - no dangerous shims or drilling required . " They pair well with our Murdock OS 1-1 / 8 " risers and have a 1-1 / 8 " clamping area , but the taper down to 1 inch O . D . on the grip ends means they can accept stock and aftermarket H-D hand controls . The CNC mandrel-bent radiuses mean for laserstraight ergonomics for all-day riding comfort ." They are available in black electroplate and mirror chrome-plated finishes in three heights from standard (' near flat ') to ' mid ' to ' high '. " The Technischer Überwachungsverein ( the
Tracker high OS
Tracker mid OS
Tracker OS
for performance chops ! WPS / HardDrive ships to its dealers in the United States from some one million plus sq ft of distribution center space at facilities in Midway , Georgia ; Fresno , California ; Midlothian , Texas ; Ashley , Indiana ; Elizabethtown , Pennsylvania and its Boise , Idaho headquarters .
HARDDRIVE V-TWIN Boise , Idaho , USA Tel : 208 376 8400 info @ hdtwin . com www . hdtwin . com www . rocketcams . com
Technical Inspection Association for TÜV ) in Germany is an independent laboratory that tests the fatigue strength , manufacturing quality and fitment for a wide range of consumer products , with special emphasis on automotive and motorcycle components and accessories . Biltwell handlebars and risers that have received TÜV verification are among the strongest and most thoroughly well-tested motorcycle parts in the world ," says Bryant .
BILTWELL INC . Temecula , California , USA Tel : 951 699 1500 service @ biltwellinc . com www . biltwellinc . com
36 AFTERMARKET MOTO DESIGN - AUGUST 2021 www . AMDchampionship . com