My VFR750F rc24 Track bike aka aajsjinkeracer 4.0

Hi, how did you measure the rake? I used a digital inclinometer on my 1986 first in stock form, and it measured 29.2 degrees, Ugh. Then with 17" rims and +10mm rise on my "new' Ohlins shock. 28.4 degrees. As you can see "real" vs calculated are a bit off. So I started fiddling as you did and after lowering the front about 1" and shorting the wheelbase 1" I arrived at a measured 26.9 degrees. I'm happy with it at this config, it handles like my ST4 did, and has no head shake.

 

Guess i still don't get it.

No matter how many expensive mods you throw at those tired antiques, any 600cc or larger newer bike than about 2000 you could find on CL for less money than you'd drop into updating a sorry VF is SO much better to ride. Modern stuff vs. old-tech. Solid vs. shakey and less reliable.

Trying to make a Missouri dray horse into a Derby winnah aain't gonna happen even with all you're geometry and formulae.

 

I agree you just don't get it, and probably never will, and I'm OK with that. To each his own. :rockon:

 

To measure the rake I used a protractor. And that isn’t dead on, so I just downloaded a protractor app hahaha. If it turns out to be 24-25 degrees that’s still fine. I’ll measure it again tonight just to be sure ;-)
I’ll measure the length of the shock for your reference aswell. If I’m not mistaken it’s some 300mm long at the moment. Which dogbones and arm I h’ve used, I’m not sure. But it works for now…. on the workbench…..

I’m using CBR600F4 forks, they’re some 760mm in length so already a good deal shorter then original. I also use the CBR tripletree, they have an offset of 32mm.

By shortening the wheel base your bike will drop in the back. That’s because of the angle of the swingarm, which is pointing up, ideally by some 12-14 degrees. But if you did it so it turns better and your happy with the handling, good on ya.

It’s not just the riding. It’s also the thinkering, learning, meeting new people. And of course having a blast at the track with more of them delusional, wacky, crazy wannebee Raineys, Spencers, Polens, etc reliving their youth ;-)

It’s easy to go out and buy the newest R1, 1199, etc. Just lay down the money and go. But that just isn’t my thing. If I would be smart and would go and buy a GSXR750, put in a GSXR1100 or Bandit 1200 engine. Or a FZ with a FZR1000 engine. Do the suspension, strip as much weight and go. But hey, I’m a V4 guy. And as long as at the end of a race I can have a beer, sit in my chair and relive the weekend that I had on a bike that I build, that’s happiness for me. And on them newer bikes that’s just not the same. Different atmosphere. Different mentality.

Indeed Rock on!
:rockon: :rockon: :rockon:

 

Forgot to measure the shocklength.....

But the rake is 24 degrees.

 

I finally measured the shock. It's 305mm long at the moment and as the geometrie is as I want it to be, it'll stay 305mm.
So all in all a fair bit longer then the standard shock that was in there.

 

For some of you out there who might be interested it ran and still runs.


Now lets get busy with making it a little more pretty....

 

I also have a 'new' bike. It was a present from a friend mine for my wedding last october. Yep I got maried after 11 years and 2 days being together with my girl. It's a VFR700, so not quite sure what to do with it being a 700. But still more spare bits to work with.

Had a mold made for this seatunit. So no longer having problems finding a seat, I can make my own :smug:

 

Picture of its first outing at Assen this year. It rained all weekend. This picture was of the 10 minutes the track was dry hahaha

Still debating on colour. Don't want to go with the standard HRC colours because it's not an HRC bike. And also not convinced if to go whole fairing or not. For one class I ride in it has to be only topfairing and oilcatchpan. But I'm not liking the look of that..... Oh well. Plenty time, it runs ;-)

 

Nice write UP!!! I drove from Dusseldorf to Amsterdam a few montsh ago, Nice city for sure. Did the Nurburgring again with the car :loco: would like the oppurtinity to ride out there and tour around. I got a F3 front wheel on one of my 3rd gen bikes, turn in is lighter. Nice pictures etc, stay cool and keep the rubber side down.

F all the "ney-sayers" I was washing up my hands at the sink the other day and was talking bikes to a fellow employee, I mentioned how awsome his bike looked parked out there and he told me how he has not cleaned his wheels in months. I told him about my lousy white wheels needing powder coating and mentioned that I wanted to paint my bike, his reply was that its an old bike and not to spend money on it. I replied, "you can't tell another man, how to spend his money." He agreed, kinda changed my view on him. F every-body basically. Follow your heart and your arse will follow eace:

 

Thanks. I try my best. Just sometimes I do a re-read on some of my posts and the English isn’t all that. It’s just that in daily live I don’t have to read-write-speak English so I’m constantly searching for words and sometimes I leave out a crucial ‘not’ or ‘and’ or ‘or’ hahaha

Düsseldorf is a lovely town. Did you try the local ‘alt’ beer? I live in Roermond, the Netherlands, so Düsseldorf is only a 45 minute drive. Or are you talking about Amsterdam? ;-)
With me living in the South I’m much more orientated towards Germany and Belgium. Also the city of Cologne, lovely place with a lot of great ‘Brauhausen’ where they serve ‘Kölsch’ a (to my taste) great pilsener. And indeed a great place for a ride. I usually start at Aachen, which is an one hour drive, and have go through the Eifel, sometimes going towards the Ardennes and back home again.

What do you mean with a F3 wheel? You mean one of a CBR600F3 and a 3rd gen is a rc36-1 I presume looking at your signature. Is it that big of a difference in feel how the brakedisc is attached?
I’m using VFR rc36-2 rims, but they are the same as the F3 right?


Something else now that I have a VFR700
Somebody told me that using the 700 ignition system is nice upgrade compared to the 750’s on how the engine runs. But no info to back it up.
I also read that the cams and thus the timing is different between the 700 and 750 so you get a little more pep. But I can’t find any info on that either, only this link where someone also had this idea.
http://vfrworld.com/forums/showthread.php/33837-VFR700-Cam-timings

Reading into it all, it gets more and more clear that the only way to really get more ponies is a overbore to get to 850cc. Pistons will set me back a $1000,- and then it would be wise to also get new rods.
Oh well, leaves something to be desired.