Swapping to 1988 FZR1000 front end questions

[ccsct203]

I have all the parts for my 1988 FZR1000 front end swap and 18" rear tire swap.
Which springs are best for the added FJ weight and which oil viscosity should I use and the volume or the dimension from the top of the fork tube?
Will the Fj front brake lines work with blue dots or do I need to stay with the R6 lines?
I'm staying with the FJ "clip-ons" have anyone had issues with these?
Any other thoughts?
Thanks for any help!

[Arnie]

Most folks who change fork springs (either Race-Tech or Sonic) have found 1.0kg/mm springs work well.  Can't tell you about fork oil or height, 10-15 wt is "normal".  Height/volume ? Probably start with Yamaha recommendation for the FZR.  Yes, the FJ brake lines will work on the 'blue dot' calipers, but getting SS lines will improve the brake feel significantly. 
Bar height and angle are pretty personal prefs.  Find what you're comfortable with.

Cheers,
Arnie

[RichBaker]

For height, I'd start at 6" from the top..... my '90 is at 130mm. Stock forks, 1.0kg/mm springs.

[ccsct203]

Thanks for the help.
I have stainless lines on my FJ now so I'll use those.
I have sets of progressive, OEM and Race-tech springs if memory serves.
I'll start with progressive and mid-weight oil.
I'm trying to do this right and build a solid, updated FJ.

[candieandy]

i just did this to my bike this year. the fzr1000 forks are 43mm the fj forks are 41mm. i got the fj triple trees machined, but the clamp-ons not the best choice to keep. this is due to the fact that the clamp-ons don't have enought metal really to machine away for the larger forks. so i had a set of handlebar clamps off a 82' virago 750. i drilled holes in the triple tree and put a spacer in. and now i have a one piece handlebar for comfort and they are raised 2".

also i never touched the forks. they are all stock and real firm so i guess we will see how they work this spring.

If you want to see pics. let me know

[racerman_27410]

there was plenty of metal on mine ... no issues removing 2mm on the stock handlebars.

Eric Gellin McClellan bored his out as well.

Kookaloo!

Frank

i just did this to my bike this year. the fzr1000 forks are 43mm the fj forks are 41mm. i got the fj triple trees machined, but the clamp-ons not the best choice to keep. this is due to the fact that the clamp-ons don't have enought metal really to machine away for the larger forks. so i had a set of handlebar clamps off a 82' virago 750. i drilled holes in the triple tree and put a spacer in. and now i have a one piece handlebar for comfort and they are raised 2".

also i never touched the forks. they are all stock and real firm so i guess we will see how they work this spring.

If you want to see pics. let me know

[candieandy]

thats what my machinist recommended, but its good to know someone has done it with no problems.

[Yamifj1200]

No problems boring the clip ons to accept the 43mm fork. You only need to Bore a total of .079'' (2 mm) out of each clip on and thats only .03937'' (1 mm) per side certainly not enough to make the clips ons unsafe by any means. JMO

Eric M

[tqmx1]

The 87/88 FZR1000 forks are 41MM so they are a direct bolt in to any of the FJs and you gain the 320MM roters. And if you have updated internals in your stock forks they can be swapped into the FZR forks

[Harvy]

The 87/88 FZR1000 forks are 41MM so they are a direct bolt in to any of the FJs and you gain the 320MM roters. And if you have updated internals in your stock forks they can be swapped into the FZR forks

SO they are damper rod forks, not cartridge?

What's the advantage then (apart from the bigger rotors)?

Harvy

[RichBaker]

Thanks for the help.
I have stainless lines on my FJ now so I'll use those.
I have sets of progressive, OEM and Race-tech springs if memory serves.
I'll start with progressive and mid-weight oil.
I'm trying to do this right and build a solid, updated FJ.

If you're over ~150 or pounds, you'll be much happier with the Race Tech straight-rate springs.... most of us heavier guys hated the progressives.

[tqmx1]

The 87/88 FZR1000 forks are 41MM so they are a direct bolt in to any of the FJs and you gain the 320MM roters. And if you have updated internals in your stock forks they can be swapped into the FZR forks

SO they are damper rod forks, not cartridge?

What's the advantage then (apart from the bigger rotors)?

Harvy

Not a heck of a lot if you are running FJ1200 gen2 or 3 wheels and brakes but if you have a gen 1 or a FJ1100 one heck of a differance.

[Harvy]

Ahha....yes indeed....I should have looked at the Avatar of the original poster shouldn't I!

Harvy