So I screwed up my sprocket last Friday.....

[Guest]

And nobody in town has one for it. Problem is, it's a 520 chain. Does anybody have any suggestions as to where I can order one online? I need at least a 47 tooth. Wouldn't mind trying a 49.

[tzortn]

I think this maybe what you are looking for:

http://www.vortexracing.com/index.php?class0_0=1528&class0_1=1813&class0_2=2130&class0_3=2131&x=18&y=5&src=directory&view=Products&submenu=Products&sfield=%23&src=directory&view=Products

Another sprocket source is http://www.sprocketspecialists2.com/ .

[Mojoe]

good luck with finding one, but i am curious as to the story behind it. how did you screw up your sprocket on friday? they usually just wear to the point of needing a new one, but can still squeeze a few days at minimum out of them....until you get a new one. to actually screw up a sprocket would take something quite severe, no? so what's the story?

[trinc]

i was just talking to someone about why i bought new sprockets/chain and stayed with a 530 setup - i stated i haven't heard anything good about vortex sprockets & they're the only one that make a 520 for the katana.

they use untreated ( un-hardened ) T7075 aluminum. too soft.

tim

[Mojoe]

i was just talking to someone about why i bought new sprockets/chain and stayed with a 530 setup - i stated i haven't heard anything good about vortex sprockets & they're the only one that make a 520 for the katana.

they use untreated ( un-hardened ) T7075 aluminum. too soft.

tim

if that is the case, he should do a 530 swap while he is at it.

[trinc]

i was just talking to someone about why i bought new sprockets/chain and stayed with a 530 setup - i stated i haven't heard anything good about vortex sprockets & they're the only one that make a 520 for the katana.

they use untreated ( un-hardened ) T7075 aluminum. too soft.

tim

if that is the case, he should do a 530 swap while he is at it.

i've wondered if the katana sprocket would cross with any older GSXR - then you'd have a lot more options. maybe ?

tim

[KnightRider]

I think the old GSXR sprockets are 4 bolt aren't they? I could be totally wrong, but I think I remember that for some reason.

[Guest]

Ok, here's the deal. I went out to the street races last Friday night. Ran once at the first spot, then we went on to the second place. At the first place we went to, they run a lot of cars and will actually go out and spray traction compound at the starting line. So naturally, my bike tire hooked up better than it had in a long time. Nice HARD pull. So we go to the next place. Hang out there for a little bit, then we decide to leave. Well, the cops decided it was time for us to leave... Anyway, on the way out of there, I was messing with a friend of mine on his Honda 600RR. We were rolling around 15-20mph and both of us opened it up at the same time. I've never walked away from a bike so fast in my life! But in the process, I felt about 4 or 5 quick jerks. Had an idea what it was, but wanted to check to be sure. We pull off into the White Castle parking lot and look. Sure enough, lots of teeth gone.

The best I can figure is from the first place we went, I must have stretched my chain from it hooking so hard. I'm sure it was making some noise, but with D&D and a helmet, good luck hearing it. With the chain loose, I can see where it would yank teeth. Especially the way it did. 3 or 4 gone, 4 or 5 there, another 4 missing, 5 more there, etc. Looked like I had my "summer" sprocket on. By this point, my chain was really loose. So I limped it home really really really slow.... I'm very suprised the chain didn't break and get my crank case to be honest. But it made it home. I looked it over when I got home, and the teeth that were remaining were less than 1/4" thick. It wasn't like that when I left the parking lot, so it had to be from the extremely loose chain on the way home. I'm just glad I don't live any further away than I do.

I looked at Dennis Kirk and they have another 47 tooth sprocket, only this one is steel. I think I'm going to go with it. It's a SunStar, which I don't know much about, but my last one was a Vortex. I think I'd rather have the steel one and gain the extra weight for the durability.

[Mojoe]

and what about just doing a 530 conversion? would that not be better so you can have more choice in the future?

[ThAzKat]

I can give you a large list of places
sprocket specialist is one

http://www.sprocketspecialists2.com/Default.aspx

[Guest]

and what about just doing a 530 conversion? would that not be better so you can have more choice in the future?

That's actually what I had on it right before I put the 520 to it. From what I understand, that's what was supposed to be on mine factory anyway, but that's not what was on there when I got it. You could have went logging with the chain that was on my bike when I bought it. So I put a 530 conversion kit on it. I eventually put the 520 conversion on it just to see what the difference would be. You'd actually be suprised at the power difference under heavy acceleration.

I guess I would be smart if I went back to a 530 seeing as everybody here had a 530 sprocket, but I'm just not that bright. I think I'll just order an extra sprocket and keep it around til I learn my lesson.

[The CyberPoet]

My advice is to go back to steel, or at least steel outer tooth ring (over an aluminum carrier). Obviously, you're torqueing it on enough that aluminum isn't up to the task. I also advise you to go back to a 530 chain/sprocket set-up. The 520 may save some weight, but it isn't as adept at handling the stresses.
Final bit of advice (and probably the most critical): Do NOT buy a race-grade chain/sprockets. Why? Because they are built lighter but somewhat weaker, with the knowledge that they only have to last a single race or a few races... Get a hefty, strong solution so you don't jeapardize yourself that way again.

Cheers
=-= The CyberPoet