What happens if the front sprocket seal is pushed out?
The seal around the countershaft (front sprocket shaft) can be pushed out, which essentially dumps all oil from the engine/transmission. This could cause loss of control due to oil getting on the rear wheel, damage to the engine, and of course the ‘bike will be unridable until the seal reinstalled and oil added.
Why do roller chain sprockets need to be ignored?
Now consider the sprockets driving all those chains. Often subjected to temperature extremes, corrosive environments, harsh washdowns and/or impact loads that destroy keyways and shear teeth, sprockets tend to be ignored until a breakdown.
What to do if your DR650 nut is loose?
The nut is a left handed thread. If you find the nut is loose on your machine you will want to check the condition of the key. If there is any side wear or grooving replace the key. Using some removable threadlocker on the nut would not be a bad idea either. Countershaft Seal: This is rare but, if it happens, could be a disaster.
Where do you put a set screw on a roller chain sprocket?
A set screw is used to prevent axial movement of the sprocket; if one is used, the placing is usually above the keyway. This location keeps the sprocket from moving along the shaft and stops the key from moving. To better hold the sprocket in place, U.S. Tsubaki incorporates two set screws as the standard.
How to troubleshoot a chain or sprocket problem?
Improper installation of the sprocket or axle. Inspect and correct. Chain casing or bearings are loose. Tighten all bolts and nuts. Excessive or insufficient slack in the chain. Adjust the distance between axles to obtain the proper amount of slack. Excessive worn chain or sprocket. Replace the chain and sprocket with new chain and sprocket.
What to do about excessive slack in chain?
Install a self-adjusting tensioner on the slack side. Load fluctuations are excessively large. Reduce fluctuations with fluid coupling or similar technique. The chain winds onto the sprocket (poor separation from the sprocket teeth). Span between axles is too large. Install an idler. Excessive slack in chain.
What causes elongation of chain and sprocket teeth?
Elongation of the chain due to chain wear or excessively worn sprocket teeth. Replace with new chain and sprocket. Rusting of the chain. Improper lubrication or poor environment. Replace chain and protect it from the environment with chain casing or proper lubrication. Excessive wear at the inside surface of link plates and sides of sprocket teeth.