Motorcycle Camshaft and Rocker Arm Set – Camshaft Rocker Arm with Sprocket & Shafts
Motorcycle Camshaft and Rocker Arm Set
This motorcycle camshaft and rocker arm set is a replacement top-end valve train set for small single-cylinder four-stroke motorcycle engines. As shown in the product photos, it includes a camshaft with its sprocket, two rocker arms and two rocker shafts. Easy Life Markets sells it as one set for riders and workshops rebuilding a worn cylinder head.
In an overhead cam motorcycle engine, the camshaft turns in the cylinder head and its lobes push on the rocker arms, which in turn open the intake and exhaust valves. The camshaft, rockers and shafts all wear against each other, so when one is worn the others usually are too. Replacing them as a set restores the correct valve lift and quiets a noisy top end.
What Is Included
As shown in the product photos:
- 1 x camshaft with sprocket
- 2 x rocker arms
- 2 x rocker arm shafts
The supplier's packing list describes the item as one motorcycle camshaft rocker arm set.
Listed Applications
The supplier's listing names the following model references: Veloci, Steeler, XSR Pro and XR3. The supplier does not give engine sizes, years or part numbers. Because of that, it is important to check this set against your own engine before ordering. See the fitment steps below.
Specifications
- Product type: Motorcycle camshaft and rocker arm set
- Contents as pictured: Camshaft with sprocket, two rocker arms, two rocker shafts
- Engine type: Single-cylinder four-stroke motorcycle engine
- Quantity: 1 set
- SKU: CJQT272797501AZ
How to Check Fitment
Small motorcycle camshafts can look almost identical but differ in lobe profile, length and sprocket tooth count. Before you buy:
- Remove the valve cover and look at your existing camshaft and rockers.
- Compare the camshaft with our photos: overall length, bearing journals, sprocket position and number of sprocket teeth.
- Compare the rocker arms: shape, adjuster screw position and the diameter of the rocker shaft.
- Check any numbers cast or stamped on your old parts and send them to us if you want us to compare.
If anything looks different, contact us before ordering.
Signs Your Camshaft or Rockers Are Worn
- Ticking or tapping from the cylinder head that valve adjustment does not fix
- Valve clearances that keep going out of adjustment quickly
- Flat spots, pitting or scoring on the cam lobes or rocker pads
- Loss of power and rough running
- Play between the rocker arms and their shafts
Installation Tips
- Set the engine at top dead center on the compression stroke and note the timing marks before removing the cam chain from the sprocket.
- Coat the cam lobes, journals, rocker pads and shafts with engine oil or assembly lube before fitting.
- Line up the sprocket timing marks exactly as your service manual shows.
- Adjust the valve clearances to the manufacturer's specification after installation.
- Turn the engine over by hand before starting to make sure nothing binds.
This is a good moment to check the cam chain and tensioner as well, since they are exposed during the job.
Why Replace the Cam and Rockers Together
A new camshaft running against old rocker pads, or new rockers on a worn cam, will wear quickly and may never run quietly. Because the parts wear into each other, fitting them as a matched set gives the best chance of a long-lasting repair. It also saves taking the head apart twice.
Keeping the New Valve Train Healthy
Overhead cam motorcycle engines rely on a steady flow of clean oil to the cylinder head. Change the oil at the interval in your owner's manual, keep the level correct, and check the valve clearances regularly. Letting the engine warm up for a minute before riding hard gives the oil time to reach the camshaft and rockers.
Valve Clearance After the Rebuild
New camshafts and rocker arms change the valve clearance, so the valves must be adjusted after fitting, even if they were correct before. On most small motorcycle engines this is done with the piston at top dead center on the compression stroke, using a feeler gauge between the rocker adjuster and the valve stem. Set both intake and exhaust clearances to the figures in your service manual, lock the adjuster nuts, and recheck after the first few hundred kilometers of riding, as new parts settle in.
If the clearances were previously very hard to set or kept changing, check the valves and valve seats as well. Worn valves can make even new rockers and a new camshaft run noisily.
Common Questions
Will this fit my motorcycle? Only if the parts match your engine. Compare the camshaft length, sprocket and rockers with your old parts before ordering.
Do I need to replace the cam chain too? Not always, but check it and the tensioner for wear while the head is open.
Buy the Motorcycle Camshaft and Rocker Arm Set at Easy Life Markets
You can order this camshaft and rocker arm set right here. The current price and availability are shown on this page. Please read our return and refund policy before buying.
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