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Hello TW nation.

I mainly use my TW200 for single track trail riding. Many of the trails have steep inclines and I often loose RPMs really fast and will die before getting to the top. I just have a stock sprocket on right now and I am pretty sure I need to go with a bigger one. I am not a small guy at 6'4" and 205lbs, but I would like more low end power to get up some of the steep hills. Is going to a 52 tooth sprocket big enough or should I jump to a 55 tooth? Can you guys give me some advise on what size and brand sprocket to go with?

I found this one on Amazon, has anyone used this one?
http://www.amazon.com/JT-Sprockets-JTR1842-55-Steel-Sprocket/dp/B000GTX458/ref=au_as_r?_encoding=UTF8&Make=Yamaha|1210&Model=TW200|20056&Year=2008|2008&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=2&vehicleType=motorcycle

Thanks for the help.
 

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Hello TW nation.

I mainly use my TW200 for single track trail riding. Many of the trails have steep inclines and I often loose RPMs really fast and will die before getting to the top. I just have a stock sprocket on right now and I am pretty sure I need to go with a bigger one. I am not a small guy at 6'4" and 205lbs, but I would like more low end power to get up some of the steep hills. Is going to a 52 tooth sprocket big enough or should I jump to a 55 tooth? Can you guys give me some advise on what size and brand sprocket to go with?

I found this one on Amazon, has anyone used this one?
http://www.amazon.com/JT-Sprockets-JTR1842-55-Steel-Sprocket/dp/B000GTX458/ref=au_as_r?_encoding=UTF8&Make=Yamaha|1210&Model=TW200|20056&Year=2008|2008&ie=UTF8&n=15684181&newVehicle=1&s=automotive&vehicleId=2&vehicleType=motorcycle

Thanks for the help.
Welcome to the forum!! Where are you from?
Here is a sprocket calculator that might help you determine what might work best.
Sprocket Calculator - the easy motorcycle sprocket and chain calculator

Personally, I think the 55 would suit you better.

A 52 would give you 3.8% difference, a 55 would be a 9.1% difference.
 
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I'm thinking 55
 
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Welcome kingtw;

When you say "mainly"; we need to know the other end also. I would venture to say that most on here that want lower off-road gearing go with a 55 tooth rear. I bought one to play with and then decided to get a 65 tooth to try (harder to find and more expensive).

I love the 65 tooth off-road. At Fred's last group ride; as we came down a steep incline from Crater Lake south of Tahoe - me not using brakes in 1st gear, I was falling behind those who were "riding" their brakes constantly while in 1st. I would have to shift up to 2nd to close the gap.

To be in the peak torque and HP range with stock gearing - I think you need to be doing around 16 mph in 1st gear; and faster in 2nd etc. About wound out in 1st and way to fast in each gear for our suspension on rough trail conditions. The 65 tooth brings you closer to the torque/power band at lower speeds and should keep you from stalling.

However; I really dislike riding around city streets at more than 35 mph with that sprocket.

So it will depend on if you get on the freeway some or just 55 mph roads or if only 35 mph roads and hard trails. 35 mph street and hard trails gets my vote for 65 tooth. Otherwise probably no less than 55 tooth if you want lower gearing. -J-
 

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I just put on your chosen sprocket, JT Sprockets JTR1842.55 55T Steel Rear Sprocket. It is my second one, for some reason it arrived silver finish not the black I thought I ordered, oh well. Anyways it is a good choice for your stated intended use. Sixty Five teeth in the rear makes for a real off road crawler, I have ridden two TWs so equipped and while very versatile off road I imagine it kills a lot of the dual sport nature of the TW.
Personally I have a 13 tooth front sprocket but a larger diameter ATV tire in the rear so my overall gearing approximates what a 14/60 with stock tire would deliver.
 

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So if you went to a 55 is the stock chain long enough ?
 

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Hi King, welcome to the forum!

I have used sprockets from JT and Sprocket Specialists. Both are good quality sprockets. Some sizes are available in both steel and aluminum. The larger sizes seem to only be available in aluminum.

I have run the following sizes of rear sprockets with the stock 14T front and a Duro 26x8x14 ATV tire. Here are some of my impressions:

47T - An improvement for highway use. Doesn't noticeably increase top speed but reduces rpms so the ride is not so buzzy. Not good (i.e., dangerous) for steep trails.

50T (stock size) - Good combination for mix of street and moderate fire road type trails.

55T - Nice improvement for steeper off-road riding while still allowing short highway hops at 55-60mph.

65T - I absolutely love this for off road. Makes steep, gnarly downhills an actual pleasure to ride. Limits on-road top speed to about 50. If you don't care about going over 40-45mph on-road, I would even consider a 70T which is the largest that I seen anyone use.

I run the dual rear sprocket setup. Here are a couple of pics showing two of the combinations that I have used:

Here is a 47/55 combo,

100_3381.JPG

Here is a 55/65 combo,

100_5020.JPG
 

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You say you ride mostly trails. For your weight you need not less than 55, 60 might be better. 65 would be for crawling up fierce rocks.
If you do put on one of the larger sprockets you will probable find yourself pulling away from stops in second gear instead of first when on pavement.
 

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Buy a couple different sizes and experiment which one to use for the selected riding. As I've gotten better at trail riding and go to deeper harder spots, I've found the weak spot in the 55 and think I may need to go to a 60. The 55 has been a good compromise as stated above because I can still do short stretches of pavement. Anything much higher than the 55 you are really getting into the "gotta trailer the TW to the trail" territory!
 

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Discussion Starter #14 (Edited)
Wow you guys are awesome, what great advice. I live in a small mountain town in Utah called Heber. I don't really have much need to go over 40-45mph even on the roads around town.

Sounds like I should go with even the bigger 65T sprocket. Anyone know where to get one of those? I will probably need a bigger chain for that huh?

What about the 60T sprocket?

Is the 14T front sprocket ok with all these rear sprockets?
 

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Discussion Starter #15
Hi King, welcome to the forum!

I have used sprockets from JT and Sprocket Specialists. Both are good quality sprockets. Some sizes are available in both steel and aluminum. The larger sizes seem to only be available in aluminum.

I have run the following sizes of rear sprockets with the stock 14T front and a Duro 26x8x14 ATV tire. Here are some of my impressions:

47T - An improvement for highway use. Doesn't noticeably increase top speed but reduces rpms so the ride is not so buzzy. Not good (i.e., dangerous) for steep trails.

50T (stock size) - Good combination for mix of street and moderate fire road type trails.

55T - Nice improvement for steeper off-road riding while still allowing short highway hops at 55-60mph.

65T - I absolutely love this for off road. Makes steep, gnarly downhills an actual pleasure to ride. Limits on-road top speed to about 50. If you don't care about going over 40-45mph on-road, I would even consider a 70T which is the largest that I seen anyone use.

I run the dual rear sprocket setup. Here are a couple of pics showing two of the combinations that I have used:

Here is a 47/55 combo,

View attachment 21424

Here is a 55/65 combo,

View attachment 21425
Great stuff. How do I accomplish the dual sprocket? Is it easy to swap?
 

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Discussion Starter #17
Is there any reason to not go down to like a 12T front sprocket and keep the 50T rear sprocket?
 

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A 62 will still fit under your chain guard, I'm not sure about a 65. I'm 220 and 6'4" and use a 70 tooth. I mostly ride technical single track between 8K-10K. I think you will be very happy with a 65. I powered out with both a 50 and a 55. Sprocket Specialists will provide you with anything from 55-70 tooth.
 

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one of the things I have noticed missing in everyone's sprocket combo's is making sure you have odd/even or even/odd for the sprocket count. If you ends up with even/even or odd/odd, the chain and sprockets wear faster and/or unevenly. This is per my 60's honda book. i.e. a 15x42 wears better and more evenly than a 14x44 since the odd ending count ensures the chain always hits all the sprockets in a rotating pattern where the 14x44 would always be hitting the sprockets in pairs. Not sure how much this matters. it just said to always keep the combo odd.
 

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one of the things I have noticed missing in everyone's sprocket combo's is making sure you have odd/even or even/odd for the sprocket count. If you ends up with even/even or odd/odd, the chain and sprockets wear faster and/or unevenly. This is per my 60's honda book. i.e. a 15x42 wears better and more evenly than a 14x44 since the odd ending count ensures the chain always hits all the sprockets in a rotating pattern where the 14x44 would always be hitting the sprockets in pairs. Not sure how much this matters. it just said to always keep the combo odd.

Not poking holes in the balloon because I too have heard this. I believe it's even been said here on the forum a time or two. But our stock TW's are 14/50. Isn't this an even number?
 
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