Approximately what RPM's should I be launching an '04 stage 1 1200 when racing, and how aggressive on clutch release? TIA, guys.

G'day Red

Somewhere in the 3000 - 4500 bracket.

You want to throw the clutch away to the take up point and then feather it from there...take quite a bit of practice to get it right.

If the bike bogs then try a higher RPM.
If it wheelies you've let out too much clutch


ou are looking to try and slip the clutch out so that the front wheel sita about a couple of inches off the ground thru first

Thanks, Stevo. Sounds like good advice. You sound like a guy who's had quite a bit of "practice" doing it!

yeah....up near 500 passes on the sporty and probably nearly as many on other bikes over the years....been racin since 85..

There's a few more tricks too but ya need to handle the basics and work up from there....let me know when yu've had a few more passes under ya belt and what you think it's doin.

The gsxr1000 streetfighter in my current avatar (25/11/04) has only been down the strip at one meeting but it ran 10.8's and gettin quicker each pass

I'm aimin for 10's outa the sporty when it's rebuilt at 88"

Hey Stevo, I know that this is getting off-topic, but what kind of horse power numbers to you think I would get with my '04 1200 (currently stage 1) if I had the heads ported, changed cams & left everything else alone?

G'day

What cams and who doin the headwork????? pretty open ended question.

How long is piece of string?????????

Maybe I'm fishing for some advice here... :rolleyes: I would consider Nallin or another reputable vendor to do the heads.... A mild cam size, perhaps one or two steps over the stock cam specs.

To give you a little background, I worked as an engine builder for a period of time and have experience hopping up cars & trucks, but I have never cracked the case on a bike engine and tinkered with it yet.

Drawing from my past working with V8's, I know that there is a tremendous amount of power to be gained by improving air flow in the heads. I also know that I don't want to go crazy on cam size because this bike is a daily driver, not a dedicated dragstrip bike.

What cam specs/part number do you recommend for this type of application?

It's tough being an oldbie in one respect and a newbie in another, know what I mean? :rolleyes:

G'day Red

I've got an engine recon background in cars too.

Look at a sporty motor as a longstroke pushrod 2 valve V motor with a common plenum... big block without the other 6 cyls.

All the basics apply, just that those heads are better than most stock heads ya ever seen before.

I havn't played with the new '04's yet but I wouldn't go much bigger than an N4 for street use and with good headwork (and you have a good starting point too with the XB heads) and the rest of the set up to complement, then 100hp is achievable but optimistic, => 90 would be closer.

I think there is some new profile cams available for the '04's.

Have a talk to Nallins or HQ or tilleys or whoever ya thinking of doin ya head work.

Nallins make good HP and don't mind revs...HQ and Tilleys tend to be more torque and street friendly

Approximately what RPM's should I be launching an '04 stage 1 1200 when racing, and how aggressive on clutch release? TIA, guys.
hi,
i launch at 5500rpm and do a controled release as quick as poss front wheel comes up 3 to 4" and grab gears

--------------------------------------------------------------------------------
1994 harley
74 c.i.
dropped /chopped
59"wheelbase
belt drive
150 avon tire
s&s e carb
custom ram air
custom seat
custom fender
forward controls
thunder header
490lbs
best rt .504
107.99mph
60' 1.7 1.8
et 12.25 12.26
runs low 12's, no bar, rides to track at track and every where else , rain or shine:p

[QUOTE=stevo]G'day Red

Somewhere in the 3000 - 4500 bracket.

You want to throw the clutch away to the take up point and then feather it from there...take quite a bit of practice to get it right.]



Do you power shift (don't let off gas) when going through the gears?

no..... I load the gear lever and blip the throtle..

Some guys hold it flat and just touch the clutch while loading the gear lever

no..... I load the gear lever and blip the throtle..

Some guys hold it flat and just touch the clutch while loading the gear lever

Loading the gear lever, meaning, you hold the shifter down then hit clutch lever and let off gas a touch when your ready to shift? I need to work on the basics. Lay em on me. :D

Load the lever upwards with your foot..it wont change while he throttle is held...as soon as the pressure is released on the gearbox by either blipping the throttle or touching the clutch the lever will go thru...

release your foot so it will reset the lever pawl and load it up again ready for the next change......


I used to race in steel capped work boots

Load the lever upwards with your foot..it wont change while he throttle is held...as soon as the pressure is released on the gearbox by either blipping the throttle or touching the clutch the lever will go thru...

release your foot so it will reset the lever pawl and load it up again ready for the next change......


I used to race in steel capped work boots

What is easier on the bike and the belt, keep throttle open and little clutch
or no clutch and let up on throttle? I want to be quicker but I don't want to beat it, if you know what I mean. If you know any good sites or links for me to brush up, I would appreciate it.
Thanks

there is an affordable new electric shifter. you hold throttle wide open...you toe up the shifter....the moment you do this a relay cuts the ignition for a fraction of a second, enough time for the shift to happen.

I got 40,000 kays out of my first belt and my second had over that on it when I pulled the bike down

Between the pair of them I had nearly 500 passes :D


I often back of the throttle and just give the clutch a slight caress at the same time...


PRATICE PRACTICE PRACTICE ... and FEEL....

You'll get it..

there is an affordable new electric shifter. you hold throttle wide open...you toe up the shifter....the moment you do this a relay cuts the ignition for a fraction of a second, enough time for the shift to happen.

Yeah, I know some guys who drag a lot use them. I'm just looking to be quick but nothing extravagant or abuse to the bike.

I got 40,000 kays out of my first belt and my second had over that on it when I pulled the bike down

Between the pair of them I had nearly 500 passes :D


I often back of the throttle and just give the clutch a slight caress at the same time...


PRATICE PRACTICE PRACTICE ... and FEEL....

You'll get it..

Okay, thanks.

Load the lever upwards with your foot..it wont change while he throttle is held...as soon as the pressure is released on the gearbox by either blipping the throttle or touching the clutch the lever will go thru...

release your foot so it will reset the lever pawl and load it up again ready for the next change......Must be brutal on the gears. What RPM do you shift?

[QUOTE=stevo]G'day Red

Somewhere in the 3000 - 4500 bracket.

You want to throw the clutch away to the take up point and then feather it from there...take quite a bit of practice to get it right.]



Do you power shift (don't let off gas) when going through the gears?

i use the clucth for the lanch and blip th throtle to change gears