Standard profile, or something sharper?
A replacement cam is a decision about how the engine will behave, not only a part to order. A standard profile keeps the low-speed pulling these engines were designed around. A faster road or competition grind moves the useful power up the rev range and generally asks for stronger valve springs, clearance checked at the valve pockets and carburation to suit. None of that is a problem when it is planned for, and all of it is a problem when the cam simply goes in. So decide what the bike is for first. If the engine is staying standard, the thing worth checking alongside the cam is the drive to it, because a worn pinion or a slack timing chain will blur accurate timing however good the lobes are.
What this category covers
- Camshafts: standard and sports profiles where both were offered
- Followers and tappets: to be renewed with the cam, not after it
- Timing drive: cam pinions, idler and timing wheels, keys
- Bearings: cam bushes, thrust washers and spacers
Say what the engine is for
Send the engine number and tell us whether this is a road machine, a trials or scrambles bike, or something being built to a class. That is what decides which profile is worth ordering.