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Discussion Starter #1
So I have 2 sets of wheels for the TW200 with different tires, knobby and street.



The street tire wheel set doesn't have a rear sprocket so I want to buy one.

I am also thinking about getting a new O-Ring chain.

I have the original 14/50.



I was thinking about having a 52 with the knobby tires and a 47 for the street tires. But I am wondering if I can get away with that and keep the same chain length, just adjust accordingly.



Is that possible? If not, what are the highest and lowest teeth count I can get away with the same length chain?



Thanks!



B.
 

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So I have 2 sets of wheels for the TW200 with different tires, knobby and street.



The street tire wheel set doesn't have a rear sprocket so I want to buy one.

I am also thinking about getting a new O-Ring chain.

I have the original 14/50.



I was thinking about having a 52 with the knobby tires and a 47 for the street tires. But I am wondering if I can get away with that and keep the same chain length, just adjust accordingly.



Is that possible? If not, what are the highest and lowest teeth count I can get away with the same length chain?



Thanks!



B.


There USED to be a post with the various links required for each sprocket combo. I can't seem to find it anymore, although I'm sure it's out there somewhere.



Another option you might consider is running a dual-sprocket in the rear. Someone on here has done that... he just uses 2 different chains and picks the one for the type of riding he is going to do.



BTW, I'm using 15/55 combination and I had to cut 3 or 4 links off of a 130 link chain.



Check this out: This is a good read



Also: TW 200 sprocket calculator
 

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Discussion Starter #3
Thanks for the links. Nice read!

However, the second to last post asked the same question and didn't get an answer.

Worst case scenario I will put the same sprocket in both. But I thought that maybe I can put the 50 on the street and do 52 on the knobbies and get away with same chain.
 

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Thanks for the links. Nice read!

However, the second to last post asked the same question and didn't get an answer.

Worst case scenario I will put the same sprocket in both. But I thought that maybe I can put the 50 on the street and do 52 on the knobbies and get away with same chain.


Hi Boret,

I was never able to use only one chain for different sprockets. I went from 50 to 54 to 52 and each time had to get a longer chain or take links out (54 to 52). Also Gerry (MRGIZMOW) was one of the guys with dual rear sprockets. You should be able to get more info from him.

Dave
 

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15/47 uses a 120 link.

Brand new rear sprocket and chain you will be one notch below 3 on the chain adjuster (on mine anyway). Going bigger, I think it's going to be really tight.
 

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There USED to be a post with the various links required for each sprocket combo. I can't seem to find it anymore, although I'm sure it's out there somewhere.



Another option you might consider is running a dual-sprocket in the rear. Someone on here has done that... he just uses 2 different chains and picks the one for the type of riding he is going to do.



BTW, I'm using 15/55 combination and I had to cut 3 or 4 links off of a 130 link chain.



Check this out: This is a good read



Also: TW 200 sprocket calculator


Wouldn't a 128 be a closer match ? Or did you just happen to have the 130?
 

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There USED to be a post with the various links required for each sprocket combo. I can't seem to find it anymore, although I'm sure it's out there somewhere.


I would LOVE to find that post!



I really want to be able to run 14/50 & 14/47 on the same (o-ring) chain.

I plan on buying new sprockets and chain ASAP and can't seem to find much info (chain type and links count) to make it a clear decision.
 

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I really want to be able to run 14/50 & 14/47 on the same (o-ring) chain.

I plan on buying new sprockets and chain ASAP and can't seem to find much info (chain type and links count) to make it a clear decision.


That should work. I had a 14/50 originally, ordered the same size chain in O-ring and a 47 sprocket and the chain fit. Adjustment went from something like 3 to 7. IIRC the chain is 122 links which I think is stock.
 

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Discussion Starter #9
That should work. I had a 14/50 originally, ordered the same size chain in O-ring and a 47 sprocket and the chain fit. Adjustment went from something like 3 to 7. IIRC the chain is 122 links which I think is stock.


Great! That's exactly what I would like to do. I can leave the 50 on the knobby and put the 47 on the street tire.

The only thing different on mine is that I am already at 6 with the 50 sprocket.... probably means that the chain is a bit stretched.
 

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That should work. I had a 14/50 originally, ordered the same size chain in O-ring and a 47 sprocket and the chain fit. Adjustment went from something like 3 to 7. IIRC the chain is 122 links which I think is stock.


Thanks for the info!

Now, the 0-ring chain for a TW is a "428" correct? And I understand DID is a good brand?

And do they usually come with a master link?
 

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Mine is a 428 DID, AFAIK it is a good brand. It did come with a masterlink.







This will probably be obvious to most, but it took me a while to figure out. The new chain is tough to thread around the front sprocket if you are not replacing it. Using the old masterlink temp fitted the old chain will pull around the new one easy as pie.







The masterlink will probably be a semi-interferance fit, you may find a little chain press handy. It was mentioned here somewhere that a vice-grip combined with a nut will work too. I found it very stiff to press together.



 

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That's great info! Thanks a bunch.




I might just have the courage to order some parts now!



The list of parts to do a sprocket change (both) and o-ring update:

New 14 tooth front sprocket

New 47 tooth rear sprocket

New DID 428V o-ring chain

New case seal

New lock washers for rear sprocket



*What am I missing?
 

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Do what I do, Boret. I also have 2 different street/offroad wheel combos and swith back amd forth beteen the two relatively often. I fit my chain to the smaller sprocket, and then put the bigger sprocket wheel in the same adjuster location. I then made a short section of chain and used another master link to hook it all up. By approximately using the same adjuster location, I don't have to re-adjust my rear brake linkage everytime I change wheels. When I'm running the smaller sprocket, I keep the short link of chain and masterlink tied to the spare wheel spoke with a bread tie.
 

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Discussion Starter #14
Do what I do, Boret. I also have 2 different street/offroad wheel combos and swith back amd forth beteen the two relatively often. I fit my chain to the smaller sprocket, and then put the bigger sprocket wheel in the same adjuster location. I then made a short section of chain and used another master link to hook it all up. By approximately using the same adjuster location, I don't have to re-adjust my rear brake linkage everytime I change wheels. When I'm running the smaller sprocket, I keep the short link of chain and masterlink tied to the spare wheel spoke with a bread tie.


That is not a bad idea!!!

Thanks for input.
 

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Discussion Starter #15
I thoroughly cleaned the chain today and counted the teeth on the sprockets.

I have 15/50. Is that the original 1990 TW200 combo or did a previous owner change the front?
 

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I run 15/50 and 15/54 on the same chain. I cut the chain to fit the 15/54 with the axle as far forward as possible. EK 428SROZ o-ring chain.
 
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