Chain length - critical? & chain selection help

**DanielM8** · 19th January 2014, 19:33

Hi,
My 1994 Suzuki GN250's chain is worn out and needs replacing. I have looked at TradeMe for 520 pitch chains (as the service manual states), and most are 120 links even though my manual specifies 100 links. Can the chain be easily cut down, or can a longer chain be used with a much longer adjustment or is it critical that I get the right length? The only GN250 chain I've found on TradeMe states 84 links.. too short. What's my best option? Also, if my chain is worn is it likely that my sprockets need replacing yet? And lastly, is it worth the extra $50 or so for the o-ring type over the solid bush type?

Thanks

**Akzle** · 19th January 2014, 19:52

wow. Search.
Cutting chain is easy. This is not a job for you.
Many replace sprockets as a matter of course. I make a decision based on how much they look like sprockets.

**Jantar** · 19th January 2014, 19:59

Originally Posted by DanielM8

Hi,
My 1994 Suzuki GN250's chain is worn out and needs replacing. I have looked at TradeMe for 520 pitch chains (as the service manual states), and most are 120 links even though my manual specifies 100 links. Can the chain be easily cut down, or can a longer chain be used with a much longer adjustment or is it critical that I get the right length? The only GN250 chain I've found on TradeMe states 84 links.. too short. What's my best option? Also, if my chain is worn is it likely that my sprockets need replacing yet? And lastly, is it worth the extra $50 or so for the o-ring type over the solid bush type?

Thanks

When you replace the chain replace the sprockets at the same time. Putting a new chain onto worn sprockets is a good way to destroy a new chain. Sometimes you can get away with 2 links difference if you change the sprocket size, but on a GN250 stay with standard sizes and number of links. Trying to put 120 links in there will have your chain dragging on the ground, jumping off the sprockets, locking up the rear wheel or the gearbox (or both), etc.

O ring should be the minimum standard of chain on any bike.

**haydes55** · 19th January 2014, 20:54

Buy the 120 link chain. O ring will be better. But it's a gn250. If you aren't doing big miles, plan on flogging it off within 20,000km and know what chain lube is, go budget.

Sprockets could be fine, check the teeth for any uneven teeth, sharp edges or hook shaped teeth. Any of the above, replace. If not, then you could be fine, just check the sprockets every thousand km to keep them in check.

I'd recommend buying/borrowing a chain breaker to cut it down to size. If you want to be a Hori, and risk damaging the chain, I have seen guys use a wedge and hammer.

Follow the manual. Don't fuck with the gearing. Just don't.

**Banditbandit** · 21st January 2014, 11:01

Originally Posted by haydes55

I'd recommend buying/borrowing a chain breaker to cut it down to size. If you want to be a Hori, and risk damaging the chain, I have seen guys use a wedge and hammer.

I've cut chain without a chain cutter and NOT using a wedge and hammer ... but no, not recommended for an amateur ...

Get the right length. Too short and it won't fit - too long and you won't have the full play in the adjustment.

And yes, put new sprockets on at the same time ... and then keep it adjusted correctly.

**Pumba** · 25th January 2014, 21:16

Get off Trade Me and go talk to the parts department at your local bike shop. You are on the North shore so head down to Barrys Point Rd and take your pick.

To be asking the questions you are you do not have enough experience to be buying parts off the internet blind.