| Author | Message | ||
     Eshardball |
Since I have to remove my clutch basket and primary chain to replace my crank seal, I was wondering if the tight spot in the Primary chain was caused by uneven wear of the chain, the sprockets, or both. Can you by repositioning the chain on the sprockets, reduce the deviation in the tight spot by any perceivable amount? Wouldn't the reduction in Primary chain tension deviation make the bike feel smoother? | ||
| Buellistic |
Nothing you can do about the tight spot accept adjust the chain/belt on it ... CHAIN/BELT adjustment Class 101 availabe upon request, just PM me so that "i" can get your e-mail address and a copy is yours ... | ||
| Eshardball |
Thanks. I am familiar with the adjustment procedure but was curious as too how the tight spot occurs and what if anything could be done to minimize the deviation in tension | ||
| Buellistic |
The adjustment procedure(play/loosenss) for primary chain and drive belt in the FACTORY SERVICE MANUAL is wrong !!! | ||
| Eshardball |
I know. Just like the spec that tells you to run the rear belt so tight that it destroys the bearings in Mainshaft 5th gear. I was just looking for some insight on what exactly causes the condition and what can be done to minimize the deviation, if anything. I still would like to have a Primary Belt Drive under my cover that could still retain the wet clutch. | ||
| Jramsey |
>>what causes the condition... Many things such as manufacturing tolerances, tooling wear,machinery tolerances plus human factor. Take a crankshaft for example, the halves are machined in a lathe between centers and say the one of the centers has a runout of .001 so ok then max the 2 halves should be out .002 right? Well next were on to machining the con rod hole and say we get real close at .0005 on each one so now we have a set of flywheels that in theory when assembled that should be within .001-.003 depending on plus or minus tolerance of the rod pin hole placement. Then you have to cut the splines for driving the crank sprocket this is a close tolerance item also but it has to be slip fit for assembly purposes and later maintenance, so some runout here also. Now we go to gear hobbing which is cutting the teeth for both sprockets in the primary and here we get into more tolerances because machinery set up and tool wear, etc. so even more runout. Chain manufactures have industry standard tolerances to deal with also. I have yet to see a chain drive primary made for any brand that didn't have a tight spot in it, at least the HD/Buell has adjustment unlike a lot of '50s'60s'70s European makes. Belt drives, primary and secondary will have a tight spot from runout as well. Get rid of all the runout and you get rid of the tight spot. I myself will keep on checking the free play every oil change. | ||
| Eshardball |
Thank you for the detailed explanation.At least I won't waste hours re indexing the chain on the sprockets in the hopes of getting some improvement |
