Norton lightweight pistons weigh 1/3 less than stock items, Kit includes rings, clips and .708" DLC coated pins for 750cc, 850cc and 920cc motors (contact us for 1007cc 83mm pistons). Smoothing out the vibes and reducing stress on the motor is the best thing you can do for your Norton. Street bikes are more pleasant to ride and racers have a new advantage. Drop in with no machining necessary except that Hi C.R. motors with bores greater than 78.5mm will need larger diameter combustion chambers. These must be combined with our longer rods. (more info).

Norton Ultra Hi compression domed piston kit for racing fuel only. These slightly domed pistons to give you approx 12:1 C.R. A drop in kit without any machining except that bores greater than 78.5mm will need larger diameter combustion chambers. Ideal for 750 short strokes. Includes rings & .708" DLC pins. Same light weight as our flat top pistons. These must be combined with our longer rods. Not suggested for 920s & up unless using alcohol (more info).

Top quality 6.4" Carrillo Norton rods. There is nothing stronger available for our Nortons. Special lightweight, low vibration design has longer length and bushless wristpin while retaining standard 89mm stroke. Because of their longer length, they must be paired with our lightweight pistons, and must use .708" DLC coated pins in the bushless small ends (the complete kit drops right in and uses regular shell bearings). Choose special short stroke 6.57" length rods for 80.4mm stroke racing cranks (more info).

Totalseal type gapless 2nd overlapping rings for perfect compression and sealing. This upgrade will convert your regular rings to gapless when you order pistons. Or you can add this upgrade to the ring set item below to convert them to gapless. Expect a little more kickstart pressure.

Replacement regular style piston ring sets for JS lightweight pistons. If you want them to be gapless then add the upgrade item above.

High strength .708" DLC pins (diamond like coating) - the same as come with our lightweight pistons. Will not fit stock pistons or rods

Unbeatable price for 32mm or 34mm flat side PWK Twin Carb Kit. Design by Keihin. Complete with lower cables, airfilters, curved manifolds with rubber mounts and clamps, Customized and tuned for Nortons with correct jetting and special needles designed "in house". Many special JS upgrades. See plumbing kit option below. No modifications necessary (more info). Customers with 30mm port heads or those buying 34mm carbs with 32mm heads see next item below. 34mm carbs will need the twist grip, cable & junction box listed below because the original parts do not have enough travel.

Modify curved intake manifolds to fit heads with 30mm ports (also acceptable for 28.5mm ports). A short machined/tapered/conical 30mm I.D. sleeve is pressed into the head side of the manifold - the carb side remains at 32mm. 34mm manifolds are likewise sleeved down to 32mm, This is only an addition to the above carb kit and must accompany a carb kit order because the manifolds are not sold separately.

Improved action twistgrip, upper cable & junction box for 32 or 34mm PWK/Keihin carbs as above. No switches. Necessary for 34mm carbs because the original parts do not have enough travel.

Plumbing and filter kit for our flatslide twin or single carb kits. High quality Tygon thick walled tubing to prevent kinks. Filter can be cleaned & lasts indefinitely. A clean simple layout that's easy to install. Single carb plumbing kit is similar but not shown in photo. Petcock barbs not included (use your originals) (installed photo).

34mm single flatlside carb for those who like simplicity, economy & easy maintenance. Design by Keihin. Complete with cable, twist grip, airfilter, 2 into 1 manifold, rubber mount and clamps, Customized and tuned for Nortons with correct jetting and special needles designed "in house". No modifications necessary other than removing airbox backing plate. Note that a single carb may not keep up with the fuel demands of a Norton at prolonged WOT. See plumbing kit above (installed photo).

Two main jets , two idle jets or two needle jets for twin carbs as above. Choose size. (.102" is our standard needle jet).

Two custom needles designed in house specifically for Nortons with 32 or 34mm PWK/Keihin design carbs.

Two extra bowl gaskets for flatlside carbs. So you don't have to wait for them to shrink back down (when re-installing) if your gaskets temporarily swell up from alcohol in today’s gas.

Airfilter for flatside carb.

Complete Radius Cam Kit - including our custom Radius cam, set of lightweight lifters, bronze lifter blocks, set of stronger, lighter, shorter pushrods to eliminate flexing (more info). For stage 3 cams the lifters must be ground to 7/8" radius. We provide this service (see below). Contact us to special order Atlas cams or cams for 90 degree cranks.

Labor charge to radius lifters to 7/8" - for stage 3 cams only. You must buy a JS 3 cam kit for this service.

Norton radius cam for use with our "tested" lightweight radiused lifters and blocks. Will not work with stock lifters. Four cam grinds available (more info). Contact us to special order Atlas cams.

JS Motorsport Bronze lifter blocks for lightweight radiused lifters - a huge improvement over heavy stock lifters. Use with our long lasting, custom-grind radiused camshaft.

Norton pushrods to be used with our lightweight radiused lifters and radiused cam only. Will not fit stock lifters. Made of high strength aircraft alloy. Virtually eliminates flexing.

Stock size valve & beehive spring kit for street or racing. Out-performs all others because the springs are approx 1/2 the weight and that raises your RPM limit and takes stress & heat off your motor. Cam flex is reduced and saved HP goes to the rear wheel. The conical shape eliminates the need for an inner spring and allows for a smaller lighter retainer - a smarter design than dual springs. This is a complete drop in kit - everything fits. Black diamond valves (eliminates stem wear) with hard stellite tips, beehive springs, titanium spring retainers, spring cups and spring spacers. For complete big valve kit see next item below (more info).

Big valve beehive spring kit for street or racing. Requires re-angled valve guides. Out-performs all others because the springs are approx 1/2 the weight and that raises your RPM limit and takes stress & heat off your motor. Cam flex is reduced and saved HP goes to the rear wheel. The conical shape eliminates the need for an inner spring and allows for a smaller lighter retainer - a smarter design than dual springs. This is a complete drop in kit - everything fits. All oversize valves are stainless steel without black coating. Induction hardened stem tips, beehive springs, titanium spring retainers, spring cups and spring spacers (more info).

Beehive valve springs without the valves. You must modify your valve tips to fit (see diagram). Titanium retainers and steel cups included.

Black diamond valve set with stem tips machined for Beehive valve springs only.

Stainless steel big valves with stem tips machined for Beehive valve springs only. Same as in our big valve kit above. Oversize valves come without black coating. Tips are induction hardened. Requires re-angled valve guides.

Special short lash caps to fit valve tips for Beehive springs. For those who modify their own valves. Also fits stock valves (not necessary for our Black diamond valves).

Our custom Copper Head Gasket for Norton twins. In various thicknesses to alter compression (more info).

Our custom Copper Base gasket for Norton Twins. .021" thick (more info).

Extra high compression .003" thin head gasket rings. This is the easiest way to raise compression approximately one point (10%) (more info).

Slippery Turcite fork bushings for Norton forks. Reduce friction, sticktion, fork tube wear and get a smoother ride with this wonderful longer lasting material. Expansion slit allows a more precise fit than stock bushings. Includes uppers & lowers. A drop in kit.

Get rid of the annoying metallic "clunking" in your forks with these aluminum sleeves. They give you a hydraulic bump stop at the top and bottom limits of fork travel as they should have been designed in the first place. Special slit in the upper collar insures a perfect tight fit. Special 1/8" oil hole plugs make these work when others don't (more info).

Norton Monoshock Racing Chassis plans (twin shock option included).
Build your own Battle Of The Twins class winning chassis.
Complete details on tubing, geometry, and implementation (more info).

One piece aluminum rocker spindle covers, including button head allen screws and aluminum washers.

A must for every Norton racer - Novice or expert. This manual contains priceless info gleaned from some of the greatest tuners of our time including notes from Peter Williams, Ron Wood, C.R. Axtell, Leo Goff and many others. Subject material includes crankshaft lightening, reshaping and balancing (how to balance your own crank). Strengthening of crank PTO shaft (very important). Detailed porting specs for three stages of tune. Exhaust pipe and megaphone specs. Making and fitting your own big valves (1mm oversize). Racing cam specs for Norton factory cams, Axtell cams and other high performance cams. Piston and pin lightening. Handling/suspension improvements for Norton forks. Photos of rear monoshock layouts (racing frame) and much more. Order now and make your bike a winner.

Unbeatable price for Joe Hunt magneto with high powered rare earth magnets for easy starting. Hotter spark and more reliable than electronic ignition systems. Miles ahead of the troublesome Lucas mags. For mounting behind cylinders (Atlas style). JS improvements include upgraded fasteners, re-usable silicone mounting gasket, detailed installation instructions with photos, Modifications for easy timing make this a better value than from other suppliers (demo video).
(more info & photos).

Unbeatable price for Joe Hunt magneto with high powered rare earth magnets for easy starting. Hotter spark and more reliable than electronic ignition systems. Same as above but for mounting on timing cover (Commando style). Special adapter plate included. JS improvements include upgraded fasteners, detailed installation instructions & timing tool (demo video).
(installed photo).
(how to mount magneto behind Commando cylinders).

SALE ITEM - 73mm 750 low compression pistons with rings and DLC pins. Crown is .040" lower than stock. Can use with .020" head gasket or with milled head (or use the .003" thin head gasket ring). Slightly oversize so you can hone your stock bore to fit. Gapless rings recomended. Intake valve pockets slightly modified.