BSA, Norton and Triumph Camshafts
We can weld and regrind stock BSA, Norton & Triumph camshafts for offset crankshaft engines using a limited number of profiles. ED G Cranks also has some new BSA camshafts that are manufactured from 4140 alloy steel that is double heat treated; hardened then nitride heat treated for longer life. All reground camshafts are nitride heat treated.
We recommend that people purchase camshafts from manufacturers such as MegaCycle, Johnson Cams and Newman Cams. These manufacturers have a wide profile selection and some, such as Newman Cams, can create a custom profiles to your specification such as when the intake and exhaust profiles are different. Ed G Cranks re-manufactured camshafts are available for any BSA, Norton or Triumph twin engine of any displacement. We usually can deliver a completed camshaft, or set of cams, within 10 weeks.

BSA camshaft

Norton camshaft

Triumph camshafts

Other twin camshafts

$375

$375

$450

$450


New camshafts can be ordered from various suppliers such as:

Megacycle Cams www.megacycle.com

SRM www.srm-engineering.com (BSA only)

Johnson Cams www.johnsoncams.com

Newman cams www.newman-cams.com












Ed G Cranks will supply drawings to any customer that is purchasing a crankshaft to send to the camshaft manufacturer of the customer's choice. Delivery from these suppliers can take from 3 to 9 months. Expect to pay 100% of the cost up front, including shipping, then keep bugging on the phone until you get your finished camshaft. When you order a camshaft from ED G Cranks you must pay 50% of the total (including shipping) as a deposit. The balance will be paid when the camshaft is ready to ship. Since the camshafts for an offset crankshaft engine may be a one-off job most camshaft suppliers treat them as special order with a markup above a standard British twin cam pricing.
Ed G Cranks has a small inventory of unground, annealed cam blanks. This allows for a fast delivery of completed camshaft using any profile specified by the customer. Ed G Cranks can deliver a re-ground stock cam that is heat treated, Parkerized and polished within 10 weeks for a limited number of profiles. The profiles that we sell, with our re-manufactured cams, are designed to suit offset crankshaft engines with increased mid and top end performance. If you are building an all-out racing motorcycle which requires a specific cam profile, order from one the the suppliers listed above.
What camshaft profile should I use?
Forget all the rules about camshaft profile selection used for stock 360 degree crankshafts. Feedback from crankshaft purchasers over the past 15 years, and our own projects, has helped us determine the profiles that provide the best performance with our cranks. Along the way we have built various test engines to develop crankshafts, evaluate camshaft profiles and experiment with balance factors. Our first engines used conservative cam profiles with a high lift and a short (stock) duration for best low to mid-range performance. Those bikes were quick off-the-line and had great mid-range power!
The next set of experiments were engines with a high-lift, long duration cam profiles developed for flat-track use. We got the same fast acceleration off the line, plus great mid range and better high end performance. The light-weight crankshaft takes care of the low-end performance, even with a small displacement 500cc engine. The higher-lift, long duration profile that does not perform well with s stock crank performs beautifully with an offset crank boosting performance through the entire rev range. The kick that you look for above 5000 rpm is still there but you got there so quickly you may not notice when the bike comes 'on the cam'.
What kind of riding do I like most? That's the question you must ask yourself when selecting a profile. We can recommend some good mid-range and high range camshaft profiles for high speed Australian-style long distance riding or for combined city-highway riding in large urban areas.

Important Caveat! Small variations in base circle and lift with reground cams are normal. Some complaints have been received from Customers that the base circle and lifts of our re-manufactured cams vary by up to .005" between lobes. This is normal, even with new cams made on conventional manual and computerized equipment as grinding wheels wear. We checked some stock BSA, Norton and Triumph cams from the mid-50's to the late 70s and found the base circle and lift varied by up to .015" between lobes! This is acceptable in a British motorcycle engine as valve adjustment is individually set for each valve. According to our camshaft grinder some car cams, from noted speed shops, vary by up to .030" between similar lobes (intake to intake)!

Above: Norton cam made by Johnson Cams who may be contacted at keith@johnsoncams.com. Johnson can now supply Norton Commando cams with the worm gear for the tachometer drive.
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Above:Triumph camshaft made by Newman Cams. Similar to all of their cams, these are made from new heat alloy steel with nitride heat-treated surface.
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An assortment of reground cams made by Canadian Chrome Plating & Crankshaft for Ed G Cranks. BSA A65 and A10 cams at left, a pair of Triumph cams in the middle and a Norton cam at right.
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