TT250 Sprockets - Page 4

kohburn · 07-26-2016, 12:48 PM

15/40 is almost the same ratio as 17/45

kohburn · 07-26-2016, 07:53 PM

ok so I removed the 47 and 50, used a sander to open up the center hole of the 43t sprocket about 1mm then installed the 43 without using the 50 as a spacer. the chain aligns perfectly with zero offset. (so this also means that with the stock offset sprocket flipped for a honda trail 90 style dual final drive, that the chain is no more out of line than stock)

quick jaunt up the road and back and i topped out around 62-63 but around 7000 rpm. I was able to hit 60 in 4th gear. since my engine is just starting to break in and is completely stock i think it will hit higher speeds, but even cruising at 60 with it at lower rpm i think its beneficial.

I may try dropping the front sprocket to a 16 (16/43 is almost the same as 17/45), and reinstall the 50t to have the dual drive. better to take a trip out to the mountains then move the chain to the 50t for trail riding.

oddthought · 07-26-2016, 07:55 PM

Quote:

Originally Posted by kohburn

ok so I removed the 47 and 50, used a sander to open up the center hole of the 43t sprocket about 1mm then installed the 43 without using the 50 as a spacer. the chain aligns perfectly with zero offset. (so this also means that with the stock offset sprocket flipped for a honda trail 90 style dual final drive, that the chain is no more out of line than stock)

quick jaunt up the road and back and i topped out around 62-63 but under 7000 rpm. I was able to hit 60 in 4th gear. since my engine is just starting to break in and is completely stock i think it will hit higher speeds, but even cruising at 60 with it at lower rpm i think its beneficial.

I may try dropping the front sprocket to a 16, and reinstall the 50t to have the dual drive. better to take a trip out to the mountains then drop move the chain to the 50t for trail riding.

Thanks for posting about all this work you're doing! This is fantastic information to have on hand for later mods.

SeerAtlas · 07-26-2016, 09:42 PM

Quote:

Originally Posted by oddthought

Thanks for posting about all this work you're doing! This is fantastic information to have on hand for later mods.

What HE said..

I am going to have to try this KOH!
What's your source on these rear sprockets?

2LZ · 07-26-2016, 10:36 PM

Kohburn.....100% per beef. No byproducts. Awesome work!

I think the 43/50 combo on this would be a super cool Honda 90 setup. probably have to have a couple extra links and a master link in the took kit possibly?

kohburn · 07-27-2016, 06:16 AM

if you figured out the exact chain lengths for both sprockets to keep the axle in the same position then you could use 2 master links and make changing gears even faster. not a bad idea.

I rode the 43 to work this morning putting another 30 miles on it. when I was alone on the road I never got over 62mph, but if there was traffic breaking up the airflow I was easily hitting 65 at about 73-7400 rpm.

kohburn · 07-27-2016, 06:20 AM

Quote:

Originally Posted by SeerAtlas

What HE said..

I am going to have to try this KOH!
What's your source on these rear sprockets?

link for 47 - "Ships from and sold by oemcycles"
https://smile.amazon.com/gp/product/B004ZFRX3I/ref=oh_aui_detailpage_o07_s00?ie=UTF8&psc=1

link for 43 - "Ships from and sold by Amazon.com"
https://smile.amazon.com/gp/product/B003CK56KO/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

may as well toss in the 45 which I did not order
- "Ships from and sold by Amazon.com"
https://smile.amazon.com/JT-Sprockets-JTR269-45-Steel-Sprocket/dp/B0068O5W3M/ref=pd_sim_sbs_263_1?ie=UTF8&dpID=5128GJNCvsL&dpSr c=sims&preST=_AC_UL160_SR159%2C160_&psc=1&refRID=3 YWE19XGX480NV7DCXPG

EachAdventure · 01-23-2017, 01:32 PM

I have the 47t coming in the mail within the next few days. Is there any modification needed to the sprocket to make it fit with either the spacers from CSC or using the stock sprocket as a spacer?

2LZ · 01-23-2017, 02:30 PM

Quote:

Originally Posted by EachAdventure

I have the 47t coming in the mail within the next few days. Is there any modification needed to the sprocket to make it fit with either the spacers from CSC or using the stock sprocket as a spacer?

You'll have to leave off the giant "C" clip if you use the spacers or the stock sprocket.

I just mounted the sprocket in place of the stock one without spacers. No problems or odd wear so far.

I know that some may think differently but I didn't feel the 6mm's didn't make a hill of beans of difference, especially with how long the chain is and also, the countershaft sprocket has a heck of a wiggle on the countershaft. The offset on my Rhino, out of the crate was WAY more offset than running a flat sprocket on the TT.

If you run the spacers, let me know what you think. I've been tussling between what's more important. The eliminating giant "C" clip that hold the sprocket on, or running a very slight offset.

mtiberio · 01-24-2017, 06:35 AM

On my bike, the swingarm was overly wide at the axle/axle spacer dimension. I literally had to squeeze down the swingarm onto the axle spacers using the nut. I had about .100" (2.5mm) gap. I have never had a bike like this. Given that, I certainly don't worry about sprocket alignment. I ended up adding washers on the right side to move the whole assembly to the left. I can see no mis-alignment with the front sprocket, and the chain doesn't go forward from the rear sprocket at an angle or anything. If you are willing to tolerate a flat sprocket, the PBI's in aluminum offer you any size you want the JTR's in steel appear to be only available in certain sizes. FWIW, I have settled on a 46 rear.

07-26-2016, 12:48 PM	#46
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	15/40 is almost the same ratio as 17/45 __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250
	1

07-26-2016, 07:53 PM	#47
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	ok so I removed the 47 and 50, used a sander to open up the center hole of the 43t sprocket about 1mm then installed the 43 without using the 50 as a spacer. the chain aligns perfectly with zero offset. (so this also means that with the stock offset sprocket flipped for a honda trail 90 style dual final drive, that the chain is no more out of line than stock) quick jaunt up the road and back and i topped out around 62-63 but around 7000 rpm. I was able to hit 60 in 4th gear. since my engine is just starting to break in and is completely stock i think it will hit higher speeds, but even cruising at 60 with it at lower rpm i think its beneficial. I may try dropping the front sprocket to a 16 (16/43 is almost the same as 17/45), and reinstall the 50t to have the dual drive. better to take a trip out to the mountains then move the chain to the 50t for trail riding. __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250 Last edited by kohburn; 07-27-2016 at 06:21 AM.
	3

07-26-2016, 10:36 PM	#50
2LZ Join Date: Mar 2010 Location: Volcano, Ca Posts: 7,103	Kohburn.....100% per beef. No byproducts. Awesome work! I think the 43/50 combo on this would be a super cool Honda 90 setup. probably have to have a couple extra links and a master link in the took kit possibly? __________________ "Light a fire for a man, and you heat him for a day. Light a man on fire, and you heat him for the rest of his life." 2007 Suzuki DRZ400S (SM convert) 2009 Q Link XP 200 1967 BSA B25 250cc Starfire 2022 Royal Enfield Interceptor 650 2023 Royal Enfield Scram 411 1948 Royal Enfield Model G 350
	2

07-27-2016, 06:16 AM	#51
kohburn Join Date: Dec 2015 Location: Coastal NC Posts: 537	if you figured out the exact chain lengths for both sprockets to keep the axle in the same position then you could use 2 master links and make changing gears even faster. not a bad idea. I rode the 43 to work this morning putting another 30 miles on it. when I was alone on the road I never got over 62mph, but if there was traffic breaking up the airflow I was easily hitting 65 at about 73-7400 rpm. __________________ -whatever you do, just be awesome. - 2008 Kawasaki Versys - 2016 CSC TT250 Last edited by kohburn; 07-27-2016 at 09:45 AM.
	2

01-23-2017, 01:32 PM	#53
EachAdventure Join Date: May 2016 Posts: 16	I have the 47t coming in the mail within the next few days. Is there any modification needed to the sprocket to make it fit with either the spacers from CSC or using the stock sprocket as a spacer?
	0

01-24-2017, 06:35 AM	#55
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	On my bike, the swingarm was overly wide at the axle/axle spacer dimension. I literally had to squeeze down the swingarm onto the axle spacers using the nut. I had about .100" (2.5mm) gap. I have never had a bike like this. Given that, I certainly don't worry about sprocket alignment. I ended up adding washers on the right side to move the whole assembly to the left. I can see no mis-alignment with the front sprocket, and the chain doesn't go forward from the rear sprocket at an angle or anything. If you are willing to tolerate a flat sprocket, the PBI's in aluminum offer you any size you want the JTR's in steel appear to be only available in certain sizes. FWIW, I have settled on a 46 rear.
	0