gas - probably as bad as a oil thread

[spike55_bmw]

At 20K, I changed everything (chain developed stiff sections - lost internal lube) but noticed the hook appearance on the front sprocket early on. A wise person here pointed out that that 43 teeth divided by 15 teeth = 2.87, which indicates that the counter-sprocket teeth "see" the chain 2.87 times more often than the teeth on the rear sprocket. Because of that the counter-sprocket will show wear sooner. The big question in my mind is whether there is any benefit (longer chain and rear sprocket life) if you replace the front conter-sprocket 2.87 times more often than the rear sprocket. Maybe it makes no difference and 20K-ish is what you get, regardless, from the stock 106 link 520 EK O-Ring chain. Please note that the Kawi OEM counter-sprocket has a rubber donut around its middle and that contacts the chain. Aftermarket ones don't and you can hear a difference in chain noise. All depends what's important to you. Don R100, A6F

--- In DSN_KLR650@yahoogroups.com, "eddie" wrote: > > My 09' has a little over 9,000 miles of 99.99% street use. (yea. too many nines. lol) > I have a Scottoiler keeping things lubed and the chain tension has been kept in spec. > The rear sprocket looks fine and the chain is in good condition (no kinks,etc...) > > Here's my puzzle: Looking through the countershaft sprocket cover, I can see the teeth on the front sprocket have a slight hook to them. The odd thing is the hook is forward - not backward. See attached very bad graphic illustration. > Is this weird or what? > > > eddie >

[cycletip]

I'd take 20K on any chain! This demonstrates your good maintenance Don. Have always been taught to let the chain and sprockets wear together as changing anything during their life cycle will accelerate the process. This seems reasonable since replacing just the chain or one sprocket at a time isn't recommended. Noticed that rubber donut when cleaning the bike this past week and thought it was an unusual. Hadn't taken the counter-shaft cover off in a while. Quiet is good IMO. Can the donut be reused or is it somehow part of the counter shaft sprocket? Also noticed another missing bolt from the last ride. Seems I always come home to find something missing or dangling from the bike. This time it was a radiator bolt. The one on the inside holding the cable guide. Not bad as the rear sub-frame last time. Blue Loctite helps but doesn't eliminate them.

--- In DSN_KLR650@yahoogroups.com, "spike55_bmw" wrote: > > At 20K, I changed everything (chain developed stiff sections - lost internal lube) but noticed the hook appearance on the front sprocket early on. A wise person here pointed out that that 43 teeth divided by 15 teeth = 2.87, which indicates that the counter-sprocket teeth "see" the chain 2.87 times more often than the teeth on the rear sprocket. Because of that the counter-sprocket will show wear sooner. > > The big question in my mind is whether there is any benefit (longer chain and rear sprocket life) if you replace the front conter-sprocket 2.87 times more often than the rear sprocket. Maybe it makes no difference and 20K-ish is what you get, regardless, from the stock 106 link 520 EK O-Ring chain. > > Please note that the Kawi OEM counter-sprocket has a rubber donut around its middle and that contacts the chain. Aftermarket ones don't and you can hear a difference in chain noise. All depends what's important to you. > > Don R100, A6F

[spike55_bmw]

Monty: Make Blue Permatex Paste (like a big 'twist' tube of ChapStick) your friend. Your bolts, screws, and nuts might not look as tighty but they will tend to stay on the bike. Rubber is part of the counter-sprocket, not transferrable or at least I never tried. Don R100, A6F

--- In DSN_KLR650@yahoogroups.com, "cycletip" wrote: > > I'd take 20K on any chain! This demonstrates your good maintenance Don. Have always been taught to let the chain and sprockets wear together as changing anything during their life cycle will accelerate the process. This seems reasonable since replacing just the chain or one sprocket at a time isn't recommended. > > Noticed that rubber donut when cleaning the bike this past week and thought it was an unusual. Hadn't taken the counter-shaft cover off in a while. Quiet is good IMO. Can the donut be reused or is it somehow part of the counter shaft sprocket? > > Also noticed another missing bolt from the last ride. Seems I always come home to find something missing or dangling from the bike. This time it was a radiator bolt. The one on the inside holding the cable guide. Not bad as the rear sub-frame last time. Blue Loctite helps but doesn't eliminate them. > > --- In DSN_KLR650@yahoogroups.com, "spike55_bmw" wrote: > > > > At 20K, I changed everything (chain developed stiff sections - lost internal lube) but noticed the hook appearance on the front sprocket early on. A wise person here pointed out that that 43 teeth divided by 15 teeth = 2.87, which indicates that the counter-sprocket teeth "see" the chain 2.87 times more often than the teeth on the rear sprocket. Because of that the counter-sprocket will show wear sooner. > > > > The big question in my mind is whether there is any benefit (longer chain and rear sprocket life) if you replace the front conter-sprocket 2.87 times more often than the rear sprocket. Maybe it makes no difference and 20K-ish is what you get, regardless, from the stock 106 link 520 EK O-Ring chain. > > > > Please note that the Kawi OEM counter-sprocket has a rubber donut around its middle and that contacts the chain. Aftermarket ones don't and you can hear a difference in chain noise. All depends what's important to you. > > > > Don R100, A6F >

[dooden]

The only time I have noticed any pinging on my 01 is when offroad, flogging it through deep Michigan sugar sand, slow tight crap and hot enough so the fan is running most of the time during the ride. Dooden A15 Green Ape

--- In DSN_KLR650@yahoogroups.com, "Jeffrey" wrote: > > My 04 PINGS on regular. It even pings on mid grade in summer. So, I run mid grade in winter and premium in summer. > > Pinging is not good. It means your engine is firing while the piston is still on its up stroke and can break ring landings etc. > > Jeffrey #3 >