GN250 chain and sprockets [Archive]

FruitLoop

25th June 2012, 19:21

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

25th June 2012, 19:27

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

FJRider

25th June 2012, 19:43

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

25th June 2012, 20:21

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

25th June 2012, 20:29

http://www.trademe.co.nz/motors/motorbikes/parts-for-sale/chains-sprockets/auction-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

25th June 2012, 20:30

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

25th June 2012, 20:46

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

25th June 2012, 20:50

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. :niceone:

FJRider

25th June 2012, 20:55

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

25th June 2012, 22:25

ducatilover

25th June 2012, 22:32

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 :2thumbsup

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

25th June 2012, 22:49

I'll try upload the manual :2thumbsup

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

25th June 2012, 23:05

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

26th June 2012, 09:57

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

27th June 2012, 16:08

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.

ducatilover

27th June 2012, 16:16

Oblivion

27th June 2012, 17:54

http://www.trademe.co.nz/motors/motorbikes/parts-for-sale/chains-sprockets/auction-488575841.htm

Chain ^

Which nut are you trying to move? You want to sit the bike on its center stand
Loosen the axle a wee bit and the use the adjusters.
The axle should have a split pin in it, usually pays to remove that

If that fails, spray something like WD40 onto the nut and try to spray it into the thread. Let it soak for a bit and you should be good to go.

FJRider

27th June 2012, 18:21

http://www.trademe.co.nz/motors/motorbikes/parts-for-sale/chains-sprockets/auction-488575841.htm

Chain ^

Which nut are you trying to move? You want to sit the bike on its center stand
Loosen the axle a wee bit and the use the adjusters.
The axle should have a split pin in it, usually pays to remove that

IT may be the locking nuts on the tensioner that is slowing him up ...

FruitLoop

27th June 2012, 22:23

Trying to loosen the axle on the left, had already removed the split pin on the right.

I shall have a go spraying it tomorrow, hopefully it isn't pouring it down!

And thanks heaps for the link, does look good. So many to look through on the net I didn't know where to look.

mossy1200

27th June 2012, 22:30

If your near Hataitai area on Sunday late morning ill be working on bike while wife watches Home and a Gay omnibust and I can show you how to replace the set. I dont have link rivit kit but can join it with punch and dolly.

FruitLoop

28th June 2012, 07:14

Thanks for the offer mossy! I have gotten the split link one which should be here tomorrow/Saturday morning so I shall pm you Saturday?

You guys are all awesome!

mossy1200

28th June 2012, 07:25

Thanks for the offer mossy! I have gotten the split link one which should be here tomorrow/Saturday morning so I shall pm you Saturday?

You guys are all awesome!

Yeah ok.:done:

FruitLoop

2nd July 2012, 17:34

So thanks to your advice and help (well really I just had to watch mostly) from mossy I have a new chain and sprockets on my bike. Cheers all.