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Wanted - New 41t SM Rear Sprocket


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Seeking a new or near-new stock 41t rear sprocket. No visible wear on the power side of the teeth. Please email swokland@gmail.com to sell your sprocket, thanks.

Just bought a cherry KLX400SR (almost identical to DRZ400S) that I'm setting up as a commuter in a distant city where I fly in and work each month. It will have street tires and be set up to go very fast down the highway and for city riding. I also have to ride it 1,300 miles to my destination. The stock final drive ratio is ridiculous, despite the 400 short-stroke motor being a lover of higher rpm. It's a shame this is not a 6-speed engine with a true, wide-ratio gearbox so we can have a lower first and highway 6th. As is this is a compromised machine. Fun for drag racing around but sucks on the highway.

I've geared a number of bikes at times way up with great results, and I expect the same for this bike.

My gearing calcs show a 16t front from Sprocket Specialists will help, 44/16=2.75 versus the stock 44/15=2.93, but will not be enough for my purposes. So, I was hoping to make use of a discarded 41t rear also for 41/16=2.56.

THe 41/16 combo should balance close enough to allow the use of the stock 112 links.

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No action so far on the 41t sprocket. It figures, I suppose. So few of these out there and most are probably hammered pretty well by now.

I went to a sprocket web site yesterday, aw heck what was it? Anyway, they had a long comment string under the DRZ area and over and over, regardless of S or SM models the tech service guy kept saying best for highway is 39/16=2.44. That's a long way gearing up from the stock 44/15=2.93, and it would be by a little, the most I've geared a bike up.

I'm typically a big advocate and one not afraid to gear way up. In fact, it's been my experience with KLR650s, for example, that when gearing up, you find the result is good, but by still was trying to shift up into a 6th gear that's not there you realize there's more territory to go up into, because you ride faster. Faster because intensity is reduced by gearing up, tricking your monkey brain into thinking you are loafing along. Took me three steps to get to 41/17=2.41 from the stock 43/15=2.86, where I settled. This even worked well in a long Pacific Northwest rider where there are lots of mountains and low speed limits. Seems backwards, but it's true.

Looking at it this way, comparing what I did on the KLR650 to the KLX400, perhaps 39/16 is the way to go? The 400's highway gearing stop is nothing short of appalingly wasteful, so why not?

Anyone have direct experience with this sprocket set? And what is the sweet thing about 39, versus 38 or 40?

It looks to me like the 39-tooth rear may also help with a problem the 400 has: chain whip under power as you accelerate, that does not stop until you are well up in rpms. Engine power impulses and the resonant frequency of vibration of the chain set the thing whipping. With the 39, the chain will ride closer to the swing arm pad, perhaps reducing chain whip.

A call will go in soon to Sprocket Specialists for my sprockets unless I hear credible direct 'negative knowledge' experiences from a conservative distance rider not so interested loud pipes, fanning of the shift lever, and wheelies everywhere and wringing the motor's head off on the highway. Someone who'll ride the bike as I will 1,200 miles in a couple of days....

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Why do you want a stock heavy sprocket , there are lots to pick from out there , even if you want steal , just asking , do you need help finding a sprocket ? Have you looked on ebay there are new ones there all day long stock. PS on my drz470sm I use 15/39. And I think this works the best , for me riding the hills and track days , I use driven sprockets on all my bikes

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Why do you want a stock heavy sprocket , there are lots to pick from out there , even if you want steal , just asking , do you need help finding a sprocket ? Have you looked on ebay there are new ones there all day long stock. PS on my drz470sm I use 15/39. And I think this works the best , for me riding the hills and track days , I use driven sprockets on all my bikes

Steel or aluminum, either way. Yes, I know where to get sprockets, and prefer AL 7075-T6 hardcoated to all else.

You having 39/15 on your SM saying it works. Too bad these bikes don't have tachometers so you can tell me what rpm you have at, say 70mph.

I'm ordering the 39/16 now. That leaves me the choice of 39/15 if the 16 proves too tall at times.

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Steel or aluminum, either way. Yes, I know where to get sprockets, and prefer AL 7075-T6 hardcoated to all else.

You having 39/15 on your SM saying it works. Too bad these bikes don't have tachometers so you can tell me what rpm you have at, say 70mph.

I'm ordering the 39/16 now. That leaves me the choice of 39/15 if the 16 proves too tall at times.

yes i do ๐Ÿ‘ at 70 mph its at 6100 rpms . dont know if this helps , i have a 470cc motor drztoklx011.jpg

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yes i do ๐Ÿ‘ at 70 mph its at 6100 rpms . dont know if this helps , i have a 470cc motor drztoklx011.jpg

Thanks for the RPM but how do you know? Why the photo? Is there a tach built into the digital display I don't know about? My shop manual shows no tach, but I have an `03 and you display looks different.

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ftw = for the win

sometimes i means f the world, but that's rarely used and you can tell by the context

With all these internet lingo, I almost thought it was, "F**k The Women.":bonk:๐Ÿ‘๐Ÿ™‚

Excuse me.๐Ÿคฃ

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Seeking a new or near-new stock 41t rear sprocket. No visible wear on the power side of the teeth. Please email swokland@gmail.com to sell your sprocket, thanks.

Just bought a cherry KLX400SR (almost identical to DRZ400S) that I'm setting up as a commuter in a distant city where I fly in and work each month. It will have street tires and be set up to go very fast down the highway and for city riding. I also have to ride it 1,300 miles to my destination. The stock final drive ratio is ridiculous, despite the 400 short-stroke motor being a lover of higher rpm. It's a shame this is not a 6-speed engine with a true, wide-ratio gearbox so we can have a lower first and highway 6th. As is this is a compromised machine. Fun for drag racing around but sucks on the highway.

I've geared a number of bikes at times way up with great results, and I expect the same for this bike.

My gearing calcs show a 16t front from Sprocket Specialists will help, 44/16=2.75 versus the stock 44/15=2.93, but will not be enough for my purposes. So, I was hoping to make use of a discarded 41t rear also for 41/16=2.56.

THe 41/16 combo should balance close enough to allow the use of the stock 112 links.

Powersport superstore online has new JT 808.41 steel rear sprockets for 25 bucks before shipping.

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Thanks for the RPM but how do you know? Why the photo? Is there a tach built into the digital display I don't know about? My shop manual shows no tach, but I have an `03 and you display looks different.

Like many of us , ha has a Trailtech Vapor , shows rpm ,water temp and other goodies..

Btw.. I run 15/41 on my 470cc , like to power wheelie in 3rd..

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To close this thread out, I went 39/16 and am very happy with it.

41/16 would have been a big improvement and right for 75mph indicated and under, but I will at times be cruising faster, as in 85-90mph indicated, where 39/16 is clearly superior.

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