Sprocket help
- Thread starter Riley W
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Poboy kartman
Senior Moments Member
Maybe Rebel gear can make you one?
Poboy kartman
Senior Moments Member
Nice to meet ya Assuming....I'm. Thought So!
ezcome-ezgo
G'me sumthin to write on
Looking this up - and please experts correct me if I am wrong - maybe the closest match to this chain is #40? If that is true, a search for Martin Sprocket 40BS16 (16 tooth) will yield results.
Poboy kartman
Senior Moments Member
The difference between the 428 and 40 is the roller size on the chains....sooo...the rollers won't fully seat on the sprocket. However, it's so close it works....sooo....???
Me.....I'd get it ....and if it wasn't 1/4"....just take a file and make it work....(this IS DIY, after all! )
Good luck!
ezcome-ezgo
G'me sumthin to write on
Well its not exactly the same. The rollers on 428 chain are 2 100ths larger, I think. They'd fit a worn sprocket fine probably. The Martin Sprockets website lists the part below. It has a 1/4" keyway. Search ebay for "40BS16 1" with or without the 1.
SPK ROLLER BS
40BS16 1
UPC: 697950004259
---------- Post added at 01:30 PM ---------- Previous post was at 01:28 PM ----------
Hey Po', we'un's helpful.
SPK ROLLER BS
40BS16 1
UPC: 697950004259
---------- Post added at 01:30 PM ---------- Previous post was at 01:28 PM ----------
Hey Po', we'un's helpful.
http://www.locateballbearings.com/S...--Ihn7Rx17dM-2TSxXbY3XgGGD-OIR_MCuhoCY87w_wcB
I bought the 40BS161 from this website, do I have to do anything besides just putting the chain on and drive?
I bought the 40BS161 from this website, do I have to do anything besides just putting the chain on and drive?
Poboy kartman
Senior Moments Member
Send Easy a warm, flat beer. The file suggestion was just in case the keyway was 3/16".... you should be good to go!
ezcome-ezgo
G'me sumthin to write on
There are used ones on eBay too, one was $13, free shipping. Maybe you need a spare.
Poboy kartman
Senior Moments Member
Hmmmf! ....One warm flat beer wasn't enough?
ezcome-ezgo
G'me sumthin to write on
2 drink minimum, remember?
I got the sprocket in the mail, and it kinda fits. Is there any way to stretch the chain/modify the sprocket at all to make them fit better? I want to go around 80 mph, I don't think a 428 chain would really fall off but I don't what to take any chances. I would prefer not to use a file or some **** 
Poboy kartman
Senior Moments Member
Set a jig up on your mill with the appropriate diameter cutter and remill the teeth.
ezcome-ezgo
G'me sumthin to write on
If you don't have access to a shop with a mill, the file is your only option. Does the chain ride high on the sprocket? Modifying the chain is not an option, IMO.
I would but I'm 15 and I'm working on the kart in my parents garage, all I have are tools, welders, grinders, etc. I'm dont think I can machine parts in any way.
---------- Post added at 03:43 PM ---------- Previous post was at 03:42 PM ----------
I guess I could use a file, I feel like I would make it uneven though. Probably still going to anyway. I don't think I would modify the chain, just stretch it. Is there anyway to stretch the chain?
I bet if I put the chain on and focred onto the sprockets it might adapt, should I just do that?
---------- Post added at 03:43 PM ---------- Previous post was at 03:42 PM ----------
I guess I could use a file, I feel like I would make it uneven though. Probably still going to anyway. I don't think I would modify the chain, just stretch it. Is there anyway to stretch the chain?
I bet if I put the chain on and focred onto the sprockets it might adapt, should I just do that?
ezcome-ezgo
G'me sumthin to write on
A good file, used with patience and care can help you get this done. Being 15 my not help with the patience part, but think of it this way: chicks will dig that you are a craftsman.
Poboy kartman
Senior Moments Member
A round file is a wonderful tool for this....along with patience, because you can slowly remove material...(and you shouldn't have to remove much.
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