Race bike building tips??

[Hanton31]

Building a race bike for this year, it's an nc30 '89'
I already have zxr400 front forks for it and changing the rear to a 17 inch along with a BMW s1000 rr shock
Anyone have Amy other tips or recommend any good tuning parts or upgrades to add without spending a fortune??
Would appreciate the reccomemdations or the knowledge
Thanks :)

[CMSMJ1]

Don't try and fix what is not already broken..

Why the ZXR forks? They are not any better than std forks? Be careful as some classes will insist you have the right "period" forks and visuals.

Where you racing? What classes? You planning to win the MotoGP?


Where I am coming from...been there, done that!

viewtopic.php?f=24&t=5824&start=0&hilit ... ild#p41146

[Neosophist]

If its still got 89 K forks then later type forks will be much better, especially with a Rick-O kit.

Should go without saying its upto you but since you asked for what peopel would do.

Depends on if your actually racing, or just making a track bike but.

1. Investigate the front end, if its K type, replace with Rick-O overhauled later NC30 forks, ZXR400 conversion is costly when you put all the pieces together and of no benefit.

2. Use the money saved from the ZXR400 conversion, sell the BMW shock and put the combined money into a proper made for NC30 shock and get it set up properly. White Power or Nitron depending on budget. Fit the RVF linkages too if changing to RVF wheel

3. Total loss or charging system? GSXR1000 flywheel mod will save you a ton of weight and allow you to keep the charging system.

Id loose the flywheel and generator all together, remove all the wirign loom that wont be needed along with all the electrical parts and fit a light weight lithium iron battery.. will save lots of weight over stock battery and charging system.

4. Ditch the rear subframe it weighs a tone, a few tubes of aluminium and you can construct somethign basic enoguh to bolt some race plastics onto.

5. 520 chain sprocket conversion with decent rubber.

Thats about all I can think of for cheap

[Hanton31]

Thanks for that!
I've heard skimming heads is a good way for a few more bhp
Yea it will be a race bike, any Instructions or info on the gsxr1000 flywheel mod and converting to total loss??

[CMSMJ1]

read my thread...and go from there

or use the search on here.

What class you racing in? Where in the world?

[Hanton31]

Riding the derby Phoenix F400,
How far did you go with yours?

[CMSMJ1]

I raced with EMRA and did a moonlight with DP too...

get a brew, read the thread...all is covered!!

DP F400 is cool...so bloody fast. I got spanked..but then again, I am shit!

[Hanton31]

Ah right cool!
Yea I've watched a couple of meetings and fancy a go so will see what happens
Love tinkering with the bike and the whole converting it to a race bike!
Just want to do as much as I can really without the 444cc bore kit which DP no longer allow as a mod
Everything else is pretty much relaxed on
You have any spared lying around from your bike that may come in handy to me??
Willing to pay of course!
Thanks :)

[CMSMJ1]

My advice is to get a working bike - get out on it and then if you reckon you need to, get spending..on a ZXR if you want to win..

DP allows 1m overbore for Yams and Kwackers...but Honda never did them as std so you are stuck to 400.

My bike is long gone..it still pains me.

I am going to see if I can get my road bike sorted and get a Cadwell race with EMRA in May...

Any excuse for some whoring...

Me at DP - with Fontyyyy on here too..


My last race...I finally won.



Racing is wicked..get on it!

[Drunkn Munky]

To be fair the 444 kit isn't that great for racing, pistons are heavy so you lose some revs but your gain is in the midrange. I thought +1mm pistons were now allowed in racing? Much better option and some of decent pistons available, some of the top guys are getting near 80bhp with these and some tuning work.