HELP SPUD! What Sprocket Pattern is this? (Pic)

[Mike_51_deluxe]

I really need to get a smaller rear sprocket on this thing, but its has a unique bolt pattern. Anyone know what fits this hub? Its a 6 bolt patter, but grouped in two's as you can see in the pic

http://a2.sphotos.ak.fbcdn.net/hphotos-ak-ash4/253447_10150221338946705_501236704_7313280_7880658 _n.jpg

[chrisdigital20]

looks like a Suzuki, try a 93 Suzuki dr200, good luck:)

[Mike_51_deluxe]

Think this would work?

http://www.motorcycle-superstore.com/2/10/211/7704/16249/PITEM/JT-520-Steel-Rear-Sprocket-1988-Suzuki-DR200-Parts.aspx

[chrisdigital20]

NO, that sprocket above is for 520 chain. you need 428!

[Mike_51_deluxe]

Ahhhh, okay, good to know lol. That would have sucked!

[Weldangrind]

I asked this in another thread before seeing this one, but can you measure the sprocket, Mike? Tell us the bolt diameter, the bolt circle and the center diameter.

[SpudRider]

...can you measure the sprocket, Mike? Tell us the bolt diameter, the bolt circle and the center diameter.
X2. ;) To be a little more explicit, we need to know the diameter of the circle which passes through the center of the bolt holes, the diameter of the bolt holes, and the diameter of the circle in the center of the sprocket. :)

Spud :)

[Mike_51_deluxe]

Thing is non of the holes are across from each other so I cant really get a good meassurement of that :(

[SpudRider]

Thing is non of the holes are across from each other so I cant really get a good meassurement of that :(
I'm sure this Chinese sprocket is a copy of a Japanese sprocket, Mike. :) I encourage you to search the catalog at the J.T. Sprockets website. ;)

http://www.jtsprockets.com/52.0.html

Spud :)

[Weldangrind]

Mike, if you're looking to figure out the bolt circle, remove the sprocket and trace the center hole and the bolt holes on a piece of paper. Using a ruler, measure from the center of a bolt hole to the edge of the center hole. Add that distance (in mm) to the center hole radius and write it down.

Using a compass from a mathematical set, set the compass to length you arrived at. Place the point of the compass in the center of a bolt hole and make a small arc with the pencil end in the middle of the center hole. Repeat that with another bolt hole. Where the two arcs intersect is the center.

Measure from the newly-discovered center to the center of a bolt hole and multiply the length by two. That's the bolt circle.

There's a more correct way of achieving the answer (and probably a simpler way as well), but this will be really close. Make sense?

[Weldangrind]

If you don't have a compass, just take the length from the center of a bolt hole to the edge of the center hole, add the center hole radius and multiply that answer by two. There might be a larger margin of error, but you'll still be close.

[chrisdigital20]

Did anyone read the first post i made??? i gave you the answer guys.
8O

[Weldangrind]

Did anyone read the first post i made??? i gave you the answer guys.
8O

JT Sprockets skips right over the '93; they have a listing for '83 to '91 or '96 to 2011. In either case, JT says that the DR200 uses a 520 sprocket. http://www.jtsprockets.com/52.0.html?&L=0

Yes, I read your post. :)

[chrisdigital20]

sorry, the 93 was only imported to china, Europe, check out some European sights, also, is that a 428 chain fir sure, ? my shineray is but your is not a xr200 clone. i will do some research for you through my European connections,what year, make , model is your bike?

[SpudRider]

Did anyone read the first post i made??? i gave you the answer guys.
8O
Yes, I read you post also, Chris. ;) As with Weldangrind, I could not find the '93 sprocket available for sale in the United States, nor could I find a diagram for it.

Spud :)

[katoranger]

I wonder if a dr125 sprocket would be 428 chain?

[SpudRider]

I wonder if a dr125 sprocket would be 428 chain?
As far as I can tell, the DR125 has a different bolt pattern, Allen. ;)

Spud :)

[Mike_51_deluxe]

Hummm, I have no idea what the chain is? Im guessing it has to be some kind of standard size cloned after a japanese bike. The bike is a 2009 Tmec200-1

[SpudRider]

Hummm, I have no idea what the chain is? Im guessing it has to be some kind of standard size cloned after a japanese bike. The bike is a 2009 Tmec200-1
I'm pretty sure you have a size 428, drive chain, Mike. Measure the distance between the centers of two link pins, and you can know for certain. ;)

Spud :)

[chrisdigital20]

what china bike it that above, make and model?, let me know what it is and i will work my magic and get this man a sprocket :D

[ejcycles]

The bike is a 2009 Tmec200-1

[katoranger]

How about changing over to a 520 chain. Swap the front sprocket too.

[Mike_51_deluxe]

I looked at the front sprocket, and the chain is really close to the caseing already so I couldnt fit a larger sprocket on there.

[Mike_51_deluxe]

Center of pin to center of pin on the chain is 13.25 mm's Give or take a .05 or so ;)

[chrisdigital20]

i will HAVE SOME p/n FOR YOU ALL SUNDAY, WE WILL PUT THIS TO REST.

[SpudRider]

Center of pin to center of pin on the chain is 13.25 mm's Give or take a .05 or so ;)
As I expected, that's a 428 drive chain. ;) You can verify that fact by searching the internet. :) A 428 drive chain has 1/2-inch (13mm) spacing between pins.

Spud :)

[katoranger]

I looked at the front sprocket, and the chain is really close to the caseing already so I couldnt fit a larger sprocket on there.

You would use a 520 sprocket with less teeth, but same diameter. Then find a smaller 520 rear sprocket that matches. Of course this would cost more money.

[Weldangrind]

I'm not convinced that the DR200 sprocket will fit. The JT sprocket has two bolt patterns, but they're both equidistant around the bolt circle. The bolts on Mike's rear sprocket are arranged in groups of two.

I don't think that a 520 conversion is the answer yet. Just my $0.02

[SpudRider]

...I don't think that a 520 conversion is the answer yet. Just my $0.02
I agree. ;) The 428 drive chain is plenty strong for these 200cc motorcycles; I wouldn't want to add the extra weight, and extra resistance that comes along with a 520 drive chain.

I find it hard to believe the Chinese didn't copy this 428 rear sprocket from another Japanese motorcycle. ;) I'm sure if one searched the J.T. Sprockets catalogue, he would find a Japanese sprocket that matches this one. :)

Spud :)

[Mike_51_deluxe]

I may just take the rear sprocket off and while Im in Seattle hit up Bent bikes and just find one with a bolt pattern that fits, I have a feeling a Renthal would work.

http://images.motorcycle-superstore.com/ProductImages/300/0000_Renthal_520_Rear_Sprocket.jpg

[culcune]

Mike, the place you ordered the bike from couldn't get you an answer about the chain?! :?

[Mike_51_deluxe]

Spent all day Saturday digging around Bent Bikes, must have gone threw about a 1,000 sprockets, and nothing. Ill call up Excalibur Powersports in Chino Ca and see what Wade can get me.

Didnt ride at all this weekend, however started it up today and arrived at work with a big ole grin on my face. Dang it this bike is fun. Everywhere I ride it turns heads, first the sound, then the looks. People think its some $13,000 italian bike or something lol.

[Brockway]

Bit of thread necromancy, but I've been looking for sprockets for this thing for a while now. Just bought one that should be in Friday. People keep asking but no one will post the dang measurements of the rear sprocket. In spite of this, I think I might have found a sprocket. Derbi uses this same pattern on their Senda 125R, could you please check the spacing on your sprocket and compare it to the pictures? Its a 428 chain available down to 48 teeth (stock is 56 I think.)

http://www.oemmotorparts.com/parts.asp?G0=140000001&G1=141000001&G2=141DE0001&G3=141DE1060&T0=Spare%20parts&T1=Motor&T2=Derbi&T3=SENDA%20125%20R&D=Sfam#

http://img192.imageshack.us/img192/585/si25231cz.jpg (http://imageshack.us/photo/my-images/192/si25231cz.jpg/)

http://img502.imageshack.us/img502/4563/derbi2520senda2520125r.jpg (http://imageshack.us/photo/my-images/502/derbi2520senda2520125r.jpg/)

[Weldangrind]

Welcome Brockway!

That's a tricky one. I haven't seen a three hole 428 sprocket with an ID like that before. Since our friends in China don't normally re-engineer stuff, it is likely original equipment on some two stroke bike, whether on or off road. I perused the JT site to see if I could find a match, but I came up empty; I searched up to 99cc and 100-199cc in Suzuki, Honda, Kawasaki and Yamaha.

I recommend that you send www.jtsprockets.com an email and ask them for a recommendation. Perhaps they have the ability to search a database by ID or bolt circle. Good luck.

[Brockway]

That sprocket picture is for the Derbi Senda 125R. Since no one has bothered to measure the TMEC's rear sprocket like people have been asking since page 1 I have no clue if its the right size. I've seen 2 rear sprockets with the 2 x 3 bolt pattern like that, Derbi and one from Piaggio, but the Piaggio one was a 50cc scooter. I only found this one by google image searching through pages and pages of "428 rear sprocket." None of the Japanese sprockets I've seen digging through JT matched the bolt pattern. If this one doesn't fit, may have to go the custom route.

My TMEC 200 should be here Friday, so I should be able to just measure the dang thing myself.

[SpudRider]

That sprocket picture is for the Derbi Senda 125R. Since no one has bothered to measure the TMEC's rear sprocket like people have been asking since page 1 I have no clue if its the right size. I've seen 2 rear sprockets with the 2 x 3 bolt pattern like that, Derbi and one from Piaggio, but the Piaggio one was a 50cc scooter. I only found this one by google image searching through pages and pages of "428 rear sprocket." None of the Japanese sprockets I've seen digging through JT matched the bolt pattern. If this one doesn't fit, may have to go the custom route.

My TMEC 200 should be here Friday, so I should be able to just measure the dang thing myself.
Welcome to these forums; we are glad you joined us! :D Sometimes we ask, but we don't get the measurements; I understand your frustration. ;)

Congratulations on acquiring your TMEC 200! If you have time, please start a new thread, and post photos of your bike after it arrives. :) Also, if you can, please measure the rear sprocket, and post the information so it might serve as a future resource for others. ;)

Spud :)

[katoranger]

Congrats on the purchase. I believe you are one of a few that own a TMEC bike here.