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. Note: These must be combined with our longer rods. (more info).

Norton extra Hi compression domed piston kit for racing. These slightly domed pistons drop right in without any machining to give you approx 12:1 C.R. Includes rings & .708" DLC pins. Same light weight as our flat top pistons. These must be combined with our longer rods. (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). 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 for 750, 850, 920 & 1007cc. 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

Design by Keihin. 32mm flat side PWK Twin Carb Kit, 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". No modifications necessary (more info). Customers with 30mm port heads see next item below.

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. This is only an addition to the above carb kit and must accompany a carb kit order because the manifolds are not sold separately.

Plumbing and filter kit for our flatlside carbs. Thick walled braid reinforced tubing to prevent kinks. Filter can be cleaned & lasts indefinitely. A clean, simple layout. Use your original petcocks (see installed photo).

1/4 turn twistgrip and upper throttle cable for PWK/Keihin carbs as above. No switches. Use your original junction box.

Two main or idle jets for twin carbs as above.

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

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. Hardface welded for the ultimate in reliability (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.

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. Hardface welded for the ultimate in reliability (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.

Beehive valve spring & valve 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. 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. 1.5mm oversize valves require heads with re-angled valve guides. Note: These springs run only with modified valve stems. (more info).

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

Standard or 1.5mm oversize black diamond valve set with stem tips machined for Beehive valve springs only. 1.5mm oversize requires head with re-angled valve guides.

Stainless steel big valves (not black diamond) with stem tips machined for Beehive valve springs only. Tips are induction hardened. Requires head with re-angled valve guides. Lash caps available (see below). Contact us to special order black diamond or Titanium big valves.

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 and thread to seal around pushrod tunnels and oil return hole. 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. Easy slip in installation (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.

Joe Hunt magneto with high powered rare earth magnets for easy starting and hotter spark. Miles ahead of the troublesome Lucas units. For mounting behind cylinders (Atlas style). JS improvements include upgraded fasteners, detailed installation instructions with photos, free timing tool and silicone housing gasket to make this a better value than from other suppliers. Can be used with Atlas auto advance (see demo video).
(see installed photo).

Joe Hunt magneto with high powered rare earth magnets for easy starting and hotter spark. Same as magneto above but for mounting on timing cover (Commando style). Special adapter plate included. JS improvements include upgraded points & condenser fasteners plus higher quality hex drive shaft, detailed installation instructions. Fixed advance only (see demo video).
(see installed photo).