Gt250/650 swingarm upgrade

[Daz]

Does anybody know if the gt650 swingarm will fit the gt250? It looks like the spindles/spacers are the same and can be interchanged but wondered if the width of the swingarm where it fastens to the frame is the same etc.

[♠️ M77]

Dare I ask ?  What would be your personal advantages of using the 650 swingarm over your 250 one ?

If you use the rear 650 rim , 650 drum, it will cause your chain to bend side ways instead of being straight  –  The 650 uses 160/60 tyre and 525 chain

However your 250 rim allows 160/60 max – I would not go beyond this on the GT250 as the Ninjas of the same CC or  ADV bikes use 130/140 rear tyre – Hyosung already gave us huge tyres in 150/70 lol

You are correct the spindles for the swing arm are for 650 frames only  –   The swing arm will get in the frame with some possible need of shims or spaces

The critical thing is making sure the shock is straight and not swayed left or right  (lest it bursts when it goes up & down improperly)

Also chain is a critical thing , so for this reason we don’t use the 650 drums or rims = we leave that for the 650 engine and its chassis.

I hope i made sense 🤐

[Daz]

I just think the 650 swingarm looks better with the adjusters etc, plus my original one is knackered and I can get a 650 one cheap etc. I was just going to use the swingarm if I could and not change the tire or chain or anything else, literally just swap the swingarm

[♠️ M77]

Hey i say why nor but ready to work with it until everything lines up 100% straight

[Daz]

I thought if I used my original wheel and everything it might just be a matter of changing the swingarm? Are the wheels the same on a 250 and a 650? I’ll see if I can measure one of each up and compare but Might just get another 250 swingarm if it’s going to be a load of hassle lol

[♠️ M77]

IMO i never saw the need for a 650 swinger.  I have the 250 on fleebay for cheaps and go dip that thang with new bearings and thick paint. You good to go! Plus if you want bobbins we have you covered lol

 

The 650 rim is wider as the 650 comes with factory 160/60 tyre.  The sprocket drum of the 650 wants the 650 rim. I found out the hard way when i was doing a GS500 conversion to a 250 chassis for a customer but id rather not go there as the gs lump in to our frame is more hassle than fun lol.

[Author]

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[Daz]

Does anybody know if the gt650 swingarm will fit the gt250? It looks like the spindles/spacers are the same and can be interchanged but wondered if the width of the swingarm where it fastens to the frame is the same etc.

[♠️ M77]

Dare I ask ?  What would be your personal advantages of using the 650 swingarm over your 250 one ?

If you use the rear 650 rim , 650 drum, it will cause your chain to bend side ways instead of being straight  –  The 650 uses 160/60 tyre and 525 chain

However your 250 rim allows 160/60 max – I would not go beyond this on the GT250 as the Ninjas of the same CC or  ADV bikes use 130/140 rear tyre – Hyosung already gave us huge tyres in 150/70 lol

You are correct the spindles for the swing arm are for 650 frames only  –   The swing arm will get in the frame with some possible need of shims or spaces

The critical thing is making sure the shock is straight and not swayed left or right  (lest it bursts when it goes up & down improperly)

Also chain is a critical thing , so for this reason we don’t use the 650 drums or rims = we leave that for the 650 engine and its chassis.

I hope i made sense 🤐

[Daz]

I just think the 650 swingarm looks better with the adjusters etc, plus my original one is knackered and I can get a 650 one cheap etc. I was just going to use the swingarm if I could and not change the tire or chain or anything else, literally just swap the swingarm

[♠️ M77]

Hey i say why nor but ready to work with it until everything lines up 100% straight

[Daz]

I thought if I used my original wheel and everything it might just be a matter of changing the swingarm? Are the wheels the same on a 250 and a 650? I’ll see if I can measure one of each up and compare but Might just get another 250 swingarm if it’s going to be a load of hassle lol

[♠️ M77]

IMO i never saw the need for a 650 swinger.  I have the 250 on fleebay for cheaps and go dip that thang with new bearings and thick paint. You good to go! Plus if you want bobbins we have you covered lol

 

The 650 rim is wider as the 650 comes with factory 160/60 tyre.  The sprocket drum of the 650 wants the 650 rim. I found out the hard way when i was doing a GS500 conversion to a 250 chassis for a customer but id rather not go there as the gs lump in to our frame is more hassle than fun lol.

[Author]

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