1986-1987 GSX-R front end

[Fjbj40]

I have looked around but have been not able to get a positve answer. Some say yes and some say no.

I am trying to find out if the GSX-R 750 and 1100 front forks are the same length for the 86-88 years?

I have been able to find plenty of 750 front ends but not much luck with the 1100 front ends (which some people recommend), up here on Canada's east coast.

thanks in advance,
Daryl

[steve murdoch]

Looks like the 750 forks are 1" shorter.

http://www.gixxer.com/forums/archive/index.php/t-43127.html

[Fjbj40]

Thanks, so just under an inch? I can machine up an extension to screw into the tube and make them the same length.

There was some other good info there also.

Thanks

[posplayr]

The 750 are shorter and the triple is not as strong. There is also a difference in offset. There is a nice complete 1100 front on eBay now. Iirc $100
The other thing to watch hour for is the axle. The 86-87 forks are 15mm and the 88 forks are 17mm. I'm running the 88 1100 forks on my gs1100ed

[John Kat]

Thanks, so just under an inch? I can machine up an extension to screw into the tube and make them the same length.

There was some other good info there also.

Thanks

I tried extending the GSXR 1100 K ( 1989) fork tubes
Don't try!
It cost me a fortune to have the parts machined and then I discovered that stainless steel doesn't like to be screwed in a chromium plated tube....at least not twice!
Here's a view of the tubes:

http://www.thegsresources.com/_forum/showthread.php?t=187018

[John Kat]

The 750 are shorter and the triple is not as strong. There is also a difference in offset. There is a nice complete 1100 front on eBay now. Iirc $100
The other thing to watch hour for is the axle. The 86-87 forks are 25mm and the 88 forks are 17mm. I'm running the 88 1100 forks on my gs1100ed

I believe you mean 15 mm and then 17 mm

[posplayr]

I believe you mean 15 mm and then 17 mm

Yes ; I miscued my Iphone

[Fjbj40]

Thanks for the heads up. Back to the drawing board or should I say hunt

I tried extending the GSXR 1100 K ( 1989) fork tubes
Don't try!
It cost me a fortune to have the parts machined and then I discovered that stainless steel doesn't like to be screwed in a chromium plated tube....at least not twice!
Here's a view of the tubes:
http://www.thegsresources.com/_forum...d.php?t=187018

[posplayr]

Thanks for the heads up. Back to the drawing board or should I say hunt

http://www.ebay.com/itm/1986-1988-SUZUKI-GSXR-1100-FRONT-END-POLISHED-CHEAP-/170969487143?_trksid=p2045573.m2042&_trkparms=aid%3D111000%26algo%3DREC.CURRENT%26ao%3D1%26asc%3D27%26meid%3D4758378832978503326%26pid%3D100033%26prg%3D1011%26rk%3D4%26sd%3D380471108808%26

[Fjbj40]

Looks cheap, but one of the forks requires replacement and do you see the freight quote he gave somebody, $236in the end, not a deal unless you could locally pick it up.

Thanks for the link though,
Cheers

http://www.ebay.com/itm/1986-1988-SU...80471108808%26

[tas850g]

87 had a 17mm front axel.


Check this out: http://www.gixxer.com/forums/showthread.php?t=188067

[John Kat]

http://www.ebay.com/itm/1986-1988-SU...80471108808%26

Be ware
This ad says it's a GSXR 1100 fork.
It isn't It's a GSXR 750 fork albeit of the same period.
The giveaway is the fact that not only are the antidives not electrically controlled but the wheel spindle is held by only one bolt versus two on the 1100 version.
This means:
a) the fork is shorter by 25mm
b) the wheel spindle is most probably 15mm in diameter
c) the calipers and the disks need to be matched ( 300 mm for the 750 and 310 mm for the 1100)
Guess how I discovered all this

[posplayr]

87 had a 17mm front axel.


Check this out: http://www.gixxer.com/forums/showthread.php?t=188067

The 17mm on the the 1987 is a typo and it was corrected in the link. See the note above the table. In fact I'm the one that instigated this and got the change made to correct the table.

[posplayr]

Be ware
This ad says it's a GSXR 1100 fork.
It isn't It's a GSXR 750 fork albeit of the same period.
The giveaway is the fact that not only are the antidives not electrically controlled but the wheel spindle is held by only one bolt versus two on the 1100 version.
This means:
a) the fork is shorter by 25mm
b) the wheel spindle is most probably 15mm in diameter
c) the calipers and the disks need to be matched ( 300 mm for the 750 and 310 mm for the 1100)
Guess how I discovered all this

The triple clamp is off of a GSXR 86-88 1100 ; you can tell because the lower triple clamps have double bolts. The GSXR 750 only has a single bolt. The triples have different offsets so upper and lower do not mix between 750 and 1100.


As far as the axle pinch bolt there is only one on the 1100 and I assume for the 750 so that is not a clue (maybe you are thinking about the double pinch bolts on the lower triple?).

Yes it appears as if the anti-dives are off of an 750 so maybe someone swapped out the stations or maybe they just swapped out the anti dives. An email to the seller to confirm the free length would be in order.

Obviously these were polished and who knows what combination they came up with.

[posplayr]

Looks cheap, but one of the forks requires replacement and do you see the freight quote he gave somebody, $236in the end, not a deal unless you could locally pick it up.

Thanks for the link though,
Cheers

Yes, I can see that shipping to CA from Ca. would be pricey