RuthlessButcher

I wanted to beef up my fork springs but not sure to what. I heard they could bottom out easily but thought guys were crazy but mine's doing it on large potholes and stuff. My riding style is fairly aggressive but no track days serious. Now bikebandit offers 0.8 kg/mm, 0.85 kg/mm, 0.9 kg/mm, 0.95 kg/mm, and 1.0 kg/mm from raceTech. Any suggestions? Stock is almost 6

Hawkrider

Anything over about .85 and you're looking at a revalve. The stock valving won't be able to keep up with the springs.

What you fail to mention, and is a key bit of information, is your weight.

RuthlessButcher

around 170

Gregw

Racetech has a weight calculator which appears down at the moment. This page has the link. http://old.racetech.com/evalving/eng...ngname=english

If you tell us your weight, I'm sure someone can tell you off the top of their head. I'm about 165 riding and could use either a .85 or .9. I switched to CBR1k forks and the stock springs were .88, which is just about perfect.

RuthlessButcher

those are probably inverted too which is cool

Gregw

Yeah, both Greg's in this thread have 'em. The big guy did his first and I followed.

RuthlessButcher

does everything bolt up or do you have to change anything else?

Hawkrider

Who you callin' "big", mister?

You might want to weigh your bike to use this spring rate estimate:

RuthlessButcher

Are the CBR forks any lighter? and does it help steering or just suspension stuff?

Gregw

There are a bunch-o-threads about forks swaps using different source bikes. Here's the link to Hawkrider's conversion.
https://www.superhawkforum.com/forum...ther+fork+swap
In the Knowledge Base there is a thread about the different forks to use.
https://www.superhawkforum.com/forum...ad.php?t=13401

I don't think any of the conversions are really "plug and play", but I was able to do my first conversion from just reading what others had done on this forum. Though I do know a little bit about wrenchin'

Gregw

If I had said "fat ***" you'd know I meant it "the other way".

Hawkrider

Hey I resemble that...I mean resent that.

Hawkrider

I don't know about lighter. The triples are Al vs stock steel, but are much beefier. Everything else is just bigger diameter, including the rotors. But the wheel itself is a couple pounds lighter, so it may all be about the same in the end. More weight on the front of the VTR is a good thing anyway. I think there's a 45/55 front/rear weight bias stock, which doesn't exacly lend to great drive out of corners if the front wheel is in the air. Yeah, it's fun, but I'd rather have it planted.

As for steering, that all depends how you set it up. If you read my thread (linked above) then you'll know that I actually went through calculations for rake and trail as well as doing some trial and error after the build. Very rarely will you get it right the first time.

I have the 06 1000RR forks on mine, and after riding a while on my 04 RR with Ohlins internals I'm starting to think the 06 front end is a little harsh on the high speed compression. I will wait for a while before doing anything though. I only have another year up here in the land of frost heaves and potholes we call Upstate NY. The forks will probably be better suited for more southern/western pavement.

BTW, the braking performance alone was worth the effort. Of all the brake combinations I tried with stock forks (a variety of pad compounds, different masters, SS lines, and even Galfer Waves), nothing I did before compares to stock 1000RR radial calipers, rotors, and pads.

Hope this answers all your questions.

RuthlessButcher

Thanks a bunch. Got me interested now