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lee


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Chain and sprockets
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Hello All,

Looking at my chain and sprocket and I notice the sprockets don't look too bad but the chain isn't sitting on the teeth properly, as if the links are too short.

On further inspection it appears to have supersprox 50T and a 13T front.Sounds like a nice set up for the dirt but will it work? does anyone else run this set up?

I've been looking at old posts but haven't seen any one with this set up.

Cheers

Lee



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Lee, a good check to see if a chain is goofed is to choose a mid point on the rear sprocket (3 o'clock position) and try to pull the chain from the sprocket.
If you can lift the chain more than half way off the sprocket tooth then it is near replacement.  hmm

When replacing chain and sprockets I would tend to favour a 14 tooth gearbox as minimum size. Any less than 14 tends to wear a chain out by flexing it too much on a small radius, IMO. wink
It's easy to compensate by adjusting the size of the rear sprocket.
E.G. - my present set up is 13 gearbox 48 rear. 48/13 = 1:3.692 ratio
I am about to change the setup and will go for a 14 gearbox and 52 rear. 52/14 = 1:3.714 ratio
This ratio is about right for the East Devon lanes that can be steep and sometimes tricky.
Your ratio of 13 gearbox and 50 rear = 50/13 = 1:3.846 ratio.
It's OK and acceptable in most cases but for my preference it's a tad too big on the rear wheel and your engine will be revving more for a given speed. confuse

Another point to consider is the chain size. There are two chains used by TTRs.
Mine is a 520 but there is a smaller 428 that was used on the Raid. Ensure you have the correct sprockets and chain set up.
This link gives details:- CLICKY THINGY

Martyn



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Budleigh Salterton. Devon

lee


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I reckon i could pull it away from the sprocket completely.

I'm thinking maybe someone has changed just the sprockets and not the chain, I've never seen a chain sit so badly on a sprocket.

Thanks for your tips Martyn, I may fit a new chain and see what it looks like. 



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Hi I'd just like to find out if the chain and sprockets from a 96-06 ttr 250 fit a 1994 ttr 250 Cheers Chris

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standard chain and sprockets
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What the standard chain and sprockets size for the ttr, seen them on totally ttr the combined and sprocket kit. 

http://www.totallyttrs.com/TTR250_sprockets.html



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standered chain and sprockets
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14/44 was the most common sprockets used in the UK - see http://www.ttr250.com/#Chain_and_sprocket_info

Brian



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just doing my Christmas list, might get get that combination and tab washer for chrimbo.

thanks

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Seems the US bikes came stock with 13/52 which is REALLY low, but I made good use of on a recent ride.

Waiting until I change out the chain to install the new 14T front sprocket that I got from Brian. I expect a little more speed on the tarmac then.



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NEK (Almost in Canada)

VERMONT USA

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