Chain & sprocket

Cog Head · Could Be A Chat Bot Joined: 21 Oct 2005 Karma :

when i brought my bike, it had a new chan and sprockets fitted, and i was they first person to use it as we picked it up from the garage where it was done.
but since i have fitted my race system, my chain keeps stretching, last weekend me dad tightened my chain for me, and iv just notice that its gone really slack again Shocked

Ad my question is, would it be worth upgrading the chain and sprockets to a 125 chain and sprockets, im guessing that they are stronger... Mr. Green

What do ya reckon?

**EDIT**the bike is a rieju rs2 50cc if you dont already know**EDIT*
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colin1 · Captain Safety Joined: 17 Feb 2005 Karma :

i reckon you arent tightening up the back wheel nut tight enough.
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Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

Depends why it is "stretching". Keeping it lubed is very important.

Some 50s do have pathetically small chains, but you might struggle to find a set of sprockets to match a larger chain. And as an example of how strong chains are, most current 125s use a 520 chain, the same size as they used on the 500cc GP bikes putting out 150~200hp.

If keeping it lubed doesn't work (and check that it is not just the rear wheel moving on the adjusters) then consider a better quality chain / heavy duty chain.

All the best

Keith
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ancientd · Renault 5 Driver Joined: 22 Jan 2006 Karma :

You may also have problems getting the right fitting for the front and rear sprocket. Being a 50 I very much doubt that the chain is actually stretching that much but as has been suggested the rear wheel may be moving, depending on how it's actually locked into the swinging arm. If you're not happy with it get a new set, if you go to a good spares supplier they may be able to upgrade your set but it's hardly worth it, a 50 cc bike don't put out that much power.
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