New User with a Question

Imafed · 09-13-2021, 05:26 PM

Hello, I am a new user to the forum. I was pointed here by VMC when I asked a question about parts.

I am converting a Razor MX650 from electric to a 49CC gas engine. The output sprocket from the engine is a 05T and the wheel sprocket for the rear wheel is a #25. Also, in order to run a chain from the engine output to the rear wheel I will need to offset it to clear the frame. I am thinking of running a short jackshaft right behind the frame with two sprockets to go from outside the frame to the inside.

I have not been able to find a jackshaft assembly to convert from 05T to #25 chain, so I was thinking of converting either the front or rear sprocket to make all the chain the same; but, I am having trouble finding the right parts to build either the #25 or 05T jackshaft.

Has anyone tried this, have any ideas or can you suggest a website that might offer a good selection of parts to build something up?

Thanks!

Bruces · 09-13-2021, 08:53 PM

Those are some seriously small chain sizes ,you might try McMaster Carr for chain ,sprockets ,shafts and bearings ,I would try to convert everything to a #35 because everything is available for mini bikes and go karts but no idea if you have enough room for your project .

Emerikol · 09-14-2021, 08:14 AM

I agree with Bruces about McMaster-Carr. Even a little 49cc powerplant will tear those tiny chains apart. By going to a #35 chain you'll find tons more parts available to really dial in the gearing. You'll be able to get pre-cut lengths of shaft material, too. Here's a link directly to the power transmission page:

https://www.mcmaster.com/power-transmission/

Imafed · 09-14-2021, 01:33 PM

Great! Thanks for the advice. I will check out the #35 gear.

09-13-2021, 05:26 PM	#1
Imafed Join Date: Sep 2021 Posts: 2	New User with a Question Hello, I am a new user to the forum. I was pointed here by VMC when I asked a question about parts. I am converting a Razor MX650 from electric to a 49CC gas engine. The output sprocket from the engine is a 05T and the wheel sprocket for the rear wheel is a #25. Also, in order to run a chain from the engine output to the rear wheel I will need to offset it to clear the frame. I am thinking of running a short jackshaft right behind the frame with two sprockets to go from outside the frame to the inside. I have not been able to find a jackshaft assembly to convert from 05T to #25 chain, so I was thinking of converting either the front or rear sprocket to make all the chain the same; but, I am having trouble finding the right parts to build either the #25 or 05T jackshaft. Has anyone tried this, have any ideas or can you suggest a website that might offer a good selection of parts to build something up? Thanks!
	1

09-14-2021, 01:33 PM	#4
Imafed Join Date: Sep 2021 Posts: 2	Thanks Great! Thanks for the advice. I will check out the #35 gear.
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09-13-2021, 08:53 PM	#2
Bruces Join Date: May 2018 Posts: 1,639	Those are some seriously small chain sizes ,you might try McMaster Carr for chain ,sprockets ,shafts and bearings ,I would try to convert everything to a #35 because everything is available for mini bikes and go karts but no idea if you have enough room for your project .
	1

09-14-2021, 08:14 AM	#3
Emerikol Join Date: Oct 2016 Location: Carrollton, GA Posts: 1,467	I agree with Bruces about McMaster-Carr. Even a little 49cc powerplant will tear those tiny chains apart. By going to a #35 chain you'll find tons more parts available to really dial in the gearing. You'll be able to get pre-cut lengths of shaft material, too. Here's a link directly to the power transmission page: https://www.mcmaster.com/power-transmission/ __________________ First Rule of Aviation: -Never Pass Up The Opportunity to Pee I was struggling to get my wife's attention; I sat down on the couch and looked comfortable. That did the trick! My wife says I only have two faults. I don't listen and something else... If at first you don't succeed, try doing it the way I told you to... The Stable: 2005 Yamaha V-Star 650 - SOLD 2015 Suzuki DR 650 2015 RPS Hawk 250 - SOLD 2016 Ural Gear Up
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