Honda CBR 600RR Forum banner

1 - 20 of 31 Posts

·
Registered
Joined
·
228 Posts
Discussion Starter #1
I recently installed a 520 conversion kit from motomummy which included driven sprockets and ek mvxz chain. My issue was with the chain changing slack and being almost too tight in some areas but then almsot too loose in others and it seems to be getting worse then better. I was told to contact Driven racing which I am awaiting word back from them. I narrowed the problem to be the rear sprocket. No matter how many times I spin the tire, forward and reverse, when ever the driven symbol on the sprocket is between 11 and 3 oclock the chain is loose and whenever it's between 4 and 7 its tight again. I placed and object as close to the rear tire as I could and spun it around to see if the bearing might be off but it seems to stay the same all the way around. Tires only have 500 miles on the. The bike is an 03 with just over 7k on it. If anyone has any other insight it would be greatly appreciated. I've spun the tire checking it at the same locations in a row and even spun it around numerous times and came up with the same conclusion. Hopefully they wont make me tear it off and send it in while my bike sits on stands this early in the season.
 
D

·
Guest
Joined
·
0 Posts
Did you align the rear tire after putting everything back on? Don't trust those little notches on the swingarm.
 

·
Registered
Joined
·
175 Posts
I've encountered that scenario but it resulted from broken rollers on an old chain. Is it possible they sent you a 525 rear or maybe the wrong chain? I would double check the part numbers if they are stamped on the components. Just a thought
 

·
Registered
Joined
·
148 Posts
Dude, I have the same problem. Have had it for over a year now. The tension on the chain changes as you rotate the wheel from too loose, to super tight w/ no slack at all. It's not as bad when you put a new chain on, but as it stretches it gets worse.


So far, I've replaced the sprockets with new oem, new oem DID chain.. That didn't work, so I replaced it with a 520 driven kit, -1 +2, EK Mvxz chain. I rode it around but the EK chain stretched and got so bad I had to buy another chain.. This time, went with a DID 520 chain. Same problem.

I've replaced the rear hub, rim, and cush drive. I've taken it to a shop, and also had my buddies look at it. Nobody can figure it out. It's so frustrating. I don't know what else is left to do.. I've spent over a grand trying to fix this issue, to no avail.

I am leary of going on longer trips or rides far from the house because it gets so bad and I constantly have to adjust the chain once it stretches. So fed up with this issue.. Kinda glad I'm not the only one..


03 RR w/ 8500mi

Keep me posted bud, I'm out of ideas.
 

·
Registered
Joined
·
219 Posts
Dude, I have the same problem. Have had it for over a year now. The tension on the chain changes as you rotate the wheel from too loose, to super tight w/ no slack at all. It's not as bad when you put a new chain on, but as it stretches it gets worse.


So far, I've replaced the sprockets with new oem, new oem DID chain.. That didn't work, so I replaced it with a 520 driven kit, -1 +2, EK Mvxz chain. I rode it around but the EK chain stretched and got so bad I had to buy another chain.. This time, went with a DID 520 chain. Same problem.

I've replaced the rear hub, rim, and cush drive. I've taken it to a shop, and also had my buddies look at it. Nobody can figure it out. It's so frustrating. I don't know what else is left to do.. I've spent over a grand trying to fix this issue, to no avail.

I am leary of going on longer trips or rides far from the house because it gets so bad and I constantly have to adjust the chain once it stretches. So fed up with this issue.. Kinda glad I'm not the only one..


03 RR w/ 8500mi

Keep me posted bud, I'm out of ideas.
07-08 RR ftw :)
 

·
Registered
Joined
·
219 Posts
How much play is there in the rear sprocket when you put it over the bolts to mount it? maybe its not centered on the rear drive properly. Its only takes less than 1/8th of in to make the chain go from tight to loose.
 

·
Registered
Joined
·
9,216 Posts
is the sprocket true?
what you are describing sounds like either a bent sprocket, or one that is machined slightly off center.

also be sure you are torquing the sprocket to the correct specs and in the correct pattern.

and I doubt the chain pitch could be the problem.
only difference between a 520, 525 and 530 is the length of the rollers.
the plates and spacing of the rollers is the same.
 

·
Registered
Joined
·
228 Posts
Discussion Starter #8
The slack right now ranges from 1" to 1 3/4 which is over the spec. I alligned the rear wheel by turning the bolts evenly and the double checked it by using a caliper in a few different lacations and that was maybe .001-.002 off from one side to the other but a different spot would show the other way. The new chain I got with the kit is a 520 as it's marked on every few links and the rear is painted 520 as well. I'll take a look at it closer to see what else could be going on. Steve0 I read one of your forums but it just ended with no solution.
 

·
Registered
Joined
·
228 Posts
Discussion Starter #10
is the sprocket true?
what you are describing sounds like either a bent sprocket, or one that is machined slightly off center.

also be sure you are torquing the sprocket to the correct specs and in the correct pattern.

and I doubt the chain pitch could be the problem.
only difference between a 520, 525 and 530 is the length of the rollers.
the plates and spacing of the rollers is the same.
When I put it on I snugged each nut with a regular ratchet skipping around as anyone would when torqueing nuts. I didn't fully torque them the first time using the torque wrench either. I believe i adjusted it 3 times but I followed the torque spec from the manual for the final torque I just gradually got there. I do work at a metal manufacturing company so my next move might be to remove the sprocket and have it checked at work. I will also check it for flattness.
 

·
Registered
Joined
·
228 Posts
Discussion Starter #11
I just got back from the garage, I tried a few different tricks, first I checked to see that the sprocket is center on the hub. I did this by sticking a piece of paper between the hub and sprocket at the tight spot and again at the loose spot on the rear of the hub. Both would allow a single piece to slide in but not 2. So if it is off, it's off by a couple thousanths. Second which has me almost convinced it's the sprocket. I took a tape measure and laid it on the floor. Put the chain where it was tight and stretched the tape out and rested it against the chain gaurd just barely touching the links of the chain. I spun the tire half way around to the loose spot and there was apporximately a .020 to .030 gap between the tape and chain. I did this again with a piece of wood I had laying around. I got the same results. I then grabbed my square and verrified that the rear tire didnt do this as well. About the only thing I can do now is remove the sprocket and take it in to work to measure it's consistancy.
 

·
Registered
Joined
·
219 Posts
I think driven sprockets suck.. I had a simliar problem- i Had lots of vibration. I changed to vortex and my problem went away.

To many ppl complaining about the samething with tigh n loose chains.

Im curious to see what you find when you bring the sprocket to your work.
 

·
Registered
Joined
·
228 Posts
Discussion Starter #13
So am I, I've heard alot of bad things about Vortex not lasting and being junk as well. I guess it's a matter of who you talk to. I think Driven is going to send me a new sprocket but I will be removing mine tonight or tomorrow and bring it to work as it's going to rain here for the next few days anyway. Lucky for me I've worked there long enough and held positions that have given me the knowledge and ebility to use any equipment we have to check it.
 

·
Registered
Joined
·
760 Posts
aw man i just orderd there 520 kit hope mine goes good i have enough bad news right now.
 

·
Registered
Joined
·
228 Posts
Discussion Starter #17
I'm going to check their replacement before installing. Removing the rear tire is not a task I wanted to do again for some time. Good luck with your sprocket set, I'll post how it checks before I send it back and their new one when I get it. Almost tempted to tear it down and take it to work tonight, I was going to take the night off and ride with some friends.
 

·
Banned
Joined
·
718 Posts
for those looking for quality aluminum sprockets, Renthal is the best. hands down
Renthal is really nice but they are so expensive and I chew threw one in about 1.5k-2.5k (I clean and lube my chain about every other weekend with kerosene and 90wt gear oil which has worked for many years on many types of bikes). They are light and very bling, but that hard anodized aluminum isn't as hard as I believed and after going through 3 I'm done. Right now I'm riding a Driven with no trouble at all with it, I went with them this time as they were cheap and haven't heard any negative things about em'. Wondering what kind of mileage this Al will get. Sunstar was always really good in the dirt, will maybe try one of their sprockets on the roadbike next.
 
1 - 20 of 31 Posts
Top