80 gs850 front end swap onto 77 gs750

[jim66hotrod]

I bought 1980 gs850 forks and triple trees to put on my 77 gs750....bearings are different. What do I do to make it work....or will it work?

[Agemax]

change the bearings to suit the 750 frame. if you look on basscliffs website there is a chart that enables you to work out what bearings you need to do the swap.....

Here...........

http://members.dslextreme.com/users/cbsaunders/gs/steering_bearings.html

[Agemax]

you can use the same bearing at the top but for the bottom you will need a 30 x 48 x 14mm bearing. go for taper roller bearings, much better than balls!

[Pete's GS]

And will the brake calipers mounted the GS 850 fork line up with the discs on a 750's front wheel? Is the 750's front axle long enough or is the 850's needed?

[jim66hotrod]

to Pete's GS

And will the brake calipers mounted the GS 850 fork line up with the discs on a 750's front wheel? Is the 750's front axle long enough or is the 850's needed?

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Yes, it all lined up perfectly. Ill post pic soon.

[Pete's GS]

So it will take two sets of tapered rollers. The GS750 replacement for the upper race and a KZ440, H1 500, or H2 750 as the most common for the bottom. Thanks! I hope All Balls is not the only supplier because I have found their quality control to be hit or miss.

[Agemax]

So it will take two sets of tapered rollers. The GS750 replacement for the upper race and a KZ440, H1 500, or H2 750 as the most common for the bottom. Thanks! I hope All Balls is not the only supplier because I have found their quality control to be hit or miss.

you will not need to buy 2 sets of bearings. once you know the sizes you need, just go to a good bearing supplier and buy them off the shelf