Finding a sprocket??? - PocketBikeForum.com

lightningryan · 05-27-2008, 01:11 AM

I am converting my electric pocket bike to a gas one. I am having trouble finding a sprocket to fit my axle. I have been looking for days. I need a sprocket that has a 2-1/8" inside diameter for a #35 chain. Please help. What can I do?

2bamp · 05-28-2008, 05:49 PM

You best bet would be to ditch the #35 chain. Every minimoto uses a #25 chain, so parts are readily available. If you want to keep the #35, you will need a pinion and sprocket. What kind of engine are you using?

lightningryan · 05-28-2008, 06:22 PM

I am using a 50cc engine. If i kept the $25 chain, how would I figure out the engine sprocket size? Its got this like star nut to take it off.

*Sleeves* · 05-28-2008, 09:37 PM

change the clutch drum , so it accepts the right size pinion , and change rear sprocket . then you able to go the a 25 H chain . I have used DID 25 chain , not the DID 25H which i should have and it rolled smooth , and never had any problems !
this is a great problem solver for your self , you will find it easier to find parts . start with a 6 tooth pinion and 68 sprocket ! this is an all around so so combo ( usually handed out stock ) depending on where you want your power , top end , low end, will be determined with the changing the different gearing combinations .
if you increase the number of teeth on your pinion , you will increase top end .
if you increase the number of teeth on your Sprockets , you will increase bottom end
if you minus a tooth on your pinion , you will gain bottom end
if you minus a tooth on your sprocket , you will gain top end

lightningryan · 05-28-2008, 09:42 PM

clutch drum? How do I change that? Can you send me links to parts and how to do it?

*Sleeves* · 05-29-2008, 10:23 PM

ahhhhhhhhhhhh........links?
The is the thing that the so called " engine gear " ( as u discribed it ) , it has 4 bolts holding it on to engine .

links if anyone else has the time to dig some up !

05-27-2008, 01:11 AM	#1 (permalink)
lightningryan Pocketbike Beginner Join Date: May 2008 My Gallery Real Name: Ryan Pocketbikes Owned: 3 Posts: 5	Finding a sprocket??? I am converting my electric pocket bike to a gas one. I am having trouble finding a sprocket to fit my axle. I have been looking for days. I need a sprocket that has a 2-1/8" inside diameter for a #35 chain. Please help. What can I do?

05-28-2008, 09:37 PM	#4 (permalink)
Sleeves Pocketbike Dealer Join Date: Oct 2005 My Gallery Real Name: ??? Pocketbikes Owned: 2 Location: winnipeg Posts: 2,551	change the clutch drum , so it accepts the right size pinion , and change rear sprocket . then you able to go the a 25 H chain . I have used DID 25 chain , not the DID 25H which i should have and it rolled smooth , and never had any problems ! this is a great problem solver for your self , you will find it easier to find parts . start with a 6 tooth pinion and 68 sprocket ! this is an all around so so combo ( usually handed out stock ) depending on where you want your power , top end , low end, will be determined with the changing the different gearing combinations . if you increase the number of teeth on your pinion , you will increase top end . if you increase the number of teeth on your Sprockets , you will increase bottom end if you minus a tooth on your pinion , you will gain bottom end if you minus a tooth on your sprocket , you will gain top end __________________ TRC , Amra , Mra , Smra 06' P1 BMS competition BZM 15.5hp Open 50cc 05' DM Telai - ZPF 18 h.p Open 50cc 08' CBR125r 96' Gsx-r 600

05-29-2008, 10:23 PM	#6 (permalink)
Sleeves Pocketbike Dealer Join Date: Oct 2005 My Gallery Real Name: ??? Pocketbikes Owned: 2 Location: winnipeg Posts: 2,551	ahhhhhhhhhhhh........links? The is the thing that the so called " engine gear " ( as u discribed it ) , it has 4 bolts holding it on to engine . links if anyone else has the time to dig some up ! __________________ TRC , Amra , Mra , Smra 06' P1 BMS competition BZM 15.5hp Open 50cc 05' DM Telai - ZPF 18 h.p Open 50cc 08' CBR125r 96' Gsx-r 600

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05-28-2008, 05:49 PM	#2 (permalink)
2bamp Pocketbike Freak Join Date: Jun 2006 My Gallery Real Name: _______________ Pocketbikes Owned: 2 Location: Winnipeg Posts: 428	You best bet would be to ditch the #35 chain. Every minimoto uses a #25 chain, so parts are readily available. If you want to keep the #35, you will need a pinion and sprocket. What kind of engine are you using?

05-28-2008, 06:22 PM	#3 (permalink)
lightningryan Pocketbike Beginner Join Date: May 2008 My Gallery Real Name: Ryan Pocketbikes Owned: 3 Posts: 5	I am using a 50cc engine. If i kept the $25 chain, how would I figure out the engine sprocket size? Its got this like star nut to take it off.

05-28-2008, 09:42 PM	#5 (permalink)
lightningryan Pocketbike Beginner Join Date: May 2008 My Gallery Real Name: Ryan Pocketbikes Owned: 3 Posts: 5	clutch drum? How do I change that? Can you send me links to parts and how to do it?