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Re: exsessive grease coming from chain sprocket area
If the grease is really thick and you don't lube the chain with that type of grease, then it would have to be from the swing arm being over-greased. If the grease is liquid then it would be coming from the output shaft seal. Get a new seal then remove the sprocket and clean the output shaft. Now remove the old seal and install the new seal.
By the way, if the oil in the gearbox looks like grease then it is past time for an oil and filter change. 10w40 motor oil.
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Are you adjusting the chain tension correctly?? Make sure the bar in installed correctly with the tension adjustment pin in the appropriate hole. Elevate the tip of the guide bar while adjusting the chain adjustment screw until the chain is snug but not tight. Then tighten the bar bolts without lowering the tip of the bar. Also ensure the drive links are engaging the sprocket correctly.
If the chain is adjusted correctly and the problem still exists, remove the sprocket side cover, bar and chain and inspect the sprocket for extreme wear. Once the sprocket is worn excessively it won't want to engage the drive links of the chain correctly which could be the source of the problem. If so, replace both the sprocket and the chain because the excess wear of the sprocket could have damaged the drive links of the chain and putting an old worn chain back on with a new sprocket will cause the new sprocket to begin wearing prematurely.
Excessive drive chain noise is caused by the following, lack of proper maintenance, keep it clean and lubed, next would be correct adjustment, most bikes about 3/4" deflection at center run of chain up and down play, next would be a worn out chain and/or drive or driven sprockets, last but not least and very noisy is the chain being stretched, if you rotate the wheel the chain gets loose then tight. Always check the sprockets for excess wear when replacing a chain, the drive sprocket on the engine is hardened steel and wears the least.
If it is running loose for a long time and is worn then should be replaced as soon as But if the tensioner has come loose which it shouldn't have then an inspection of the links will further tell you if it should be replaced.There are ways to inspect the timing chain.This is a rough guide.
Timing Chain and Sprockets Cleaning and Inspection
Clean the components with cleaning solvent.
Wear safety glasses in order to avoid eye damage.
Dry the components with compressed air.
Inspect the timing chain for binding or wear.
Inspect the camshaft and crankshaft sprockets for:
Worn teeth (1)
Damaged teeth (2)
Chipped teeth (3)
Worn valleys between the sprocket teeth
Inspect the crankshaft sprocket keyway for wear.
Inspect the crankshaft sprocket oil pump drive splines for wear.
Inspect the chain guide (232) for the following conditions:
Loose metal inserts (1)
Cracking (2) in the chain contact area
Excessive grooves (3) in the chain contact area Grooves 1 mm (0.040 in) or
less in depth are to be considered normal wear.
It might not be just excess. Try taking off the chain and bar and cleaning the groove on the bar with a wire brush and also the holes at the sprocket end. They could have build up of sawdustin them. Also dust out the cover and area around the clutch/sprocket. This should make a difference.
Remove the bar and chain and examine the sprocket teeth for excess wear or other damage. Make sure the chain 'pitch' (the distance between the drive teeth) matches the sprocket pitch. If the sprocket is badly damaged, the entire clutch should be replaced. Hope this helps!
hi you could check the rear sprocket bearing, firmly grip the sprocket try rocking it from side to side, you should not have to much exsess play, have you refited the spacer that fits between the sprocket housing and the wheel? it is easy for this to be omited as it can fall out when sprocket housing is removed from the wheel, this will put undue stress on the bearing inside this hub as the wheel is tightened causing early bearing failure, you will need to remove the wheel again to check this, you may also check the conecting link has not been over riveted causing the link to become tight, check the link manualy compare it to the other links for stiffnes this will also make a clicking noise, is the sprocket a 1 peice construction on the rear, using a scredriver or similar rest it ontop of your swinging arm, rotate the wheel slowly and check for runout in the sprocket,was this noise apparent before you fitted the chain and sprockets, check security of the front sprocket, remove cover and check there has been no contact between chain and cover and or metal strengthening bar, run machine with cover removed to eliminate it from poss cause, hope this helps
chains & sprockets are subject to extreme forces & adverse conditions.adjust chain to recommended specs at the 'tight spot',with riders weight on saddle.excessively worn chain is denoted by being able to pull chain away from rear sprocket teeth enough to expose 1/2 a tooth.worn sprockets will have 'pointy'teeth.if wheel sprocket is worn,don't ignore drive sprocket.use a quality lube designed for exposed chains.
if the chain get tight the bar is moving. inspect inside the bar for metal burs .does the gear on the end of the bar spin freely, it may need grease/cleaning. are you sure its grabing the bar and the cluth isnt grabbing it?