GSXR 86-88 Fork Extensions

[TxGSrider]

I added 1986 GSXR1100 forks and wheel to my GS1100E a few years ago, but most of you know they are shorter than the stock forks, so when they are installed close to the correct height, the clamp on bars have to be mounted under the upper tree. That leaves me in a pretty bent over riding position for long rides. Most of the fork extensions are for Harleys or Hondas with 41mm forks and they use an M38-1.0 but after some research I found that the GSXR forks use M37-1.0. This should be the same as a Yamaha Styker There are some companies that make 2" and 3" extensions https://www.ebay.com/itm/41mm-Fork-...040486?hash=item1a0f6e5c26:g:ah4AAOSwu1VW3Lr0 .

Im sure some will say they aren't safe or something, but I don't see any issues if you run the 2" ones and clamp it at the thread area. I may order a pair in the future to be sure.

 

[tas850g]

what’s the fork tube diameter?

Maybe they have your tube diameter: https://www.woodcraft-cfm.com/product/3-inch-clip-on-riser-assembly

 

[TxGSrider]

With the more modern GSX-R1100 forks one remedy is to drill the top triple for risers and conventional handle bars. Not familiar with what the 86 top triple looks like and if there is enough area.

Are you worried about developing a Quasi-moto hunched back or are you worried about striking your headers on a speed bump?

lol... I have already hit the headers when I had pulled the tubes trough the trees far enough to clamp the bars on above the tree, but it was comfortable to ride. It also caused my fender to hit my oil cooler on larger bumps (not really safe).
I've got Apex clip on bars with a 4" riser post (the tallest they make) but when I have to mount them below the riser I lose about 1-1/2" so now they only have about a 2-1/2 rise... thus making me ride hunched over. Not a big deal on short rides to work and back, but painful after about an hour of riding... I guess Im just getting old.
The best compromise would be to make the forks about 2" longer, and I think these risers might work.