How many pins between sprockets on twin cam engine?
I like to span around 6 – 8 pins between the sprockets on a twin cam engine. Unicam engines are trickier and the number of pins you can measure is usually less. It is important to try and measure across multiple pins because the variation between new and old chain measurements will be more pronounced this way.
When to replace the cam chain on a Moto?
When I set the plunger with the old chain installed the ninth tooth was engaged on the plunger. Observations like this can be used to gauge cam chain wear and to determine when the chain should be replaced. Every engine will have specific marks designed into components to aid in the timing of the engine.
How can I tell if my cam chain is worn out?
I want to discuss and share with you some signs that the cam chain is worn out. Just like the drive chain, timing chains elongate, fatigue, and wear out. Luckily, they are not subject to dirt and mud, are bathed in an oil bath, and their overall environment is much better.
What happens when the timing chain is off on a Moto?
Cam timings that are off several degrees will result in a loss of power and the cam chain tensioner will have quite a job trying to take slack out of the valvetrain. When a timing chain elongates it may not do so in a uniform way and parts of the chain may be tighter or looser than others.
Do you need to replace chain and sprockets?
Plus, in a replacement situation you’re typically replacing only the belt, whereas with a chain setup you need to replace the chain and sprockets. Regardless of style, however, all of our experts agree that it’s absolutely imperative for the aftermarket part to follow the lead of the OE manufacturer.
What to do when your timing chain jumps?
When you are sure the cam marks are lined up properly and the sprocket and the keyway on the end of the cam are lined up, you can push the sprocket back onto the cam and tighten the bolt back down. 9. Put the rocker arms back and re-install the tensioner if needed. 10.
Which is more expensive timing chain or sprocket?
Timing chain sets are far more expensive, both at the OE level and within the aftermarket. Plus, in a replacement situation you’re typically replacing only the belt, whereas with a chain setup you need to replace the chain and sprockets.
What’s the difference between cast iron and sintered timing sprockets?
Says another technical expert, the biggest change in timing sprockets has been a move from machined cast iron to sintered (powdered metal). Most sintered sprockets require no machining which eliminates extra manufacturing steps and also produces closer tolerances from one part to the next.