GN250 chain and sprockets

[FruitLoop]

Hey all, replacing my chain and sprockets on my wee 2fiddy, have found a DID o-ring chain 520V with JT sprockets for $150. Are these good/is it a good deal? Thanks guys

[ducatilover]

Both good brands and that's a good price for a chain/sprocket kit.

[FJRider]

Hey all, replacing my chain and sprockets on my wee 2fiddy, have found a DID o-ring chain 520V with JT sprockets for $150. Are these good/is it a good deal? Thanks guys

Check to see if the gearing on those sprockets match the one's you have now. Usually the number of teeth the sprocket has ... is stamped on the sprocket. On a GN250 ... a few teeth on either sprocket (more or less) will make a noticeable difference in performance.

[FruitLoop]

Thanks guys. If it does have more/less teeth, what would the difference be? Ie if there are more compared to same and less?

[mossy1200]

http://www.trademe.co.nz/motors/moto...-486270256.htm

The 15 / 41 that they are selling is stock gearing so will be ok.
Im assuming thats the kit your looking at.

[ducatilover]

Thanks guys. If it does have more/less teeth, what would the difference be? Ie if there are more compared to same and less?

Less teeth on the rear = less revs at speed, not recommended on a GN (I've had two of the unfortunate wee things)
Less teeth on the front = more revs.

Hopefully that's understandable.
I would go with the factory sizes, the GN is geared ideally for what it does, longer gearing and it won't be able to push it, shorter gearing is a waste of time.
The factory chain length is 100 links on a 520 chain, I'll have a peek at my sprockets tomorrow and tell you the factory sizes if need be?

[FruitLoop]

Thank you! Very helpful, exactly what I was after ducatilover. No need to put you out looking thanks, I shall have a look at mine tomorrow once it is light again...can't wait to move in Nov and have a garage and access to heaps more tools at the future inlaws!

And yep mossy that's the one.

Would it be daft to try figure this out myself? Haven't really done that much on my bike yet but I can generally make things work. The bike shop wanted to charge me an arm and a leg to do it so I figured it might be worth it to invest in some more tools etc some can do more in the future?

[ducatilover]

Have you got an owner's manual? I could try send you one if you don't, always handy to have.
Ultimately, it's not a hard job to do and can be a great learning curve.

If you have a split link chain on it now, it'll be a super easy job if you buy another one like it.

[FJRider]

Would it be daft to try figure this out myself? Haven't really done that much on my bike yet but I can generally make things work. The bike shop wanted to charge me an arm and a leg to do it so I figured it might be worth it to invest in some more tools etc some can do more in the future?

I'm sure there will be a few in the Wellington area that would be happy to show/watch/help you do it. Probably lend the required tools too. There maybe even "workshop nights" being run in your area.

Check the Forum pages for such things for the Wellington area. (often sticky threads)

[FruitLoop]

I have a few pages I found on the net but not the whole one, it would be awesome if you could!

Now I feel daft, what defines a split link chain? I googled but couldn't quite figure it out. Pretty sure from memory that the one on Astrid now is the same as the one I'm looking at?

And thanks FJ I shall have a look.

[ducatilover]

I have a few pages I found on the net but not the whole one, it would be awesome if you could!

Now I feel daft, what defines a split link chain? I googled but couldn't quite figure it out. Pretty sure from memory that the one on Astrid now is the same as the one I'm looking at?

And thanks FJ I shall have a look.

I'll try upload the manual

The split link is the type with the little clip on one link you can pop off with a small screw driver, as opposed to one with rivets, which needs a chain breaker or angle grinder

[FruitLoop]

I'll try upload the manual

The split link is the type with the little clip on one link you can pop off with a small screw driver, as opposed to one with rivets, which needs a chain breaker or angle grinder

Thanks! Ooh I just searched on here and found a link that worked

I shall check my chain tomorrow after work and see. Would I need anything different for putting the did chain on (as I note it is a riveted one), if the current one is a split link one?

Oh and I went down with a torch - got impatient - mossy is spot on, the 15/41 is the standard I have now.

[ducatilover]

http://dl.dropbox.com/u/26633588/GN250%20Manual.pdf
This should work.


You'll want a chain riveter to put one on. May be worth investing in one if you plan on doing a couple of chains (it pays itself off fairly fast)

[ktm84mxc]

On a GN a split link will do as the GN is not endowed with an abundance of power, these are easier to fit and you only need a pair of pliers and large flat head screw driver. Joining links can be purchased individually just get the DID one to fit your chain. Just make sure the open end of the joining link faces the rear of the bike when on the top of the rear sprocket.

[FruitLoop]

Thank you all. So after looking at the manual and such, I think I shall just keep looking around and see what I can find in the way of split-link chains as I don't quite think I shall be doing the chain riveter justice by buying it.

Had a go at tightening the chain yesterday but couldn't get the nut loose. Any tips on doing so as a fairly light person not able to make it budge this time? Otherwise I may just have to finish work early and pay a visit to Wellington Motorcycles for a helping hand.