1/4 mile times

Post edited by: rpkaw, at: 2007/11/09 05:31

I could almost bet money u had those puny 115 or 125 jets in the 34's and really hope u went waay up since then. 125 is like a 12oz can of beer 142 jet is a pounder!

Nothing like resurrecting a 10 year thread Nads

Still an interesting thread, even if 10yr old. Some of the 10yr old stuff I kind of question, like 10s in the quarter mile. I remember when cycle world built up a 1978 Z1R to run in the 10s zone, it took quite a bit of work to get 10.9 seconds vs the stock bike that ran around 12.00. I highly doubt a 10.5 street KZ1000 on regular gas with simple 1075 kit.

RonKZ650 wrote: I highly doubt a 10.5 street KZ1000 on regular gas with simple 1075 kit.

Same - without huge amounts of money spent on serious engine modifications, the best I 1/4 mile I ever did on any 80's street bikes was 11.5's at 117 - 120 mph - on a heavily modified (mostly by removing weight from the chassis - engine was internally stock but finely tuned) 79 CBX that weighed only 500 lbs. And I only weighed 150 lbs back then. too. Funny, as I never lost one street - stop light race on that bike (given, most street racing only lasted up to about 70 - 80 mph before having to brake hard for other traffic). That included so-called mid 10 second stock bikes like FJ's, GS1150's, GSXR1100, Vmax, CBR1000, ZX10R's.....one guy on a Ninja kept trying (and losing by several bike lengths), and finally gave up, asking me "were you born on that thing or something?".

My Little KZ650 is a legit 11.20 street bike. With a cam and carb upgrade it'll go in the 10.'s

Well, if things go according to plan this season - I'll have maybe three to five street bike projects I'm involved with making passes down the strip this season (ridden by respective owners)....

1. My "Beater II" 81 KZ1000LTD.....bike is being built for under $2.5K from 98% used parts - 1170cc, maybe 115 RWHP, I'm hoping for mid to low 11's....with no N0S....still looking for a useable 18 mm crankshaft, though....
2. An 85 GS1150E, 1220cc, approx. 120 RWHP, about 475 lbs, I'd say maybe low 11's to mid 10's....
3. J's custom fuel injected 81 /83 GPz1400......140-155 RWHP, guessing mid to low 10's.....for this year, anyway (potential exists for mid 9's once "dialed in")....
4. An 82 Katana 1100, about 90 RWHP, close to stock engine internals, low 12's to high 11's
5. My latest personal project - a used 20k mile junkyard stock engine CBXA......low `12's to hifgh 11's (bike weight at under 500 lbs, me at about 180 lbs)

*Added - only no.s 4 and 5's above have engines that aren't "built to the 9's"! All have aftermarket induction and exhaust systems. All are short wheelbase sport bikes, not purpose built dragsters - no drag tires or slicks, wheelie bars, stretched, raked, street equipment removed (other than mirrors), special tuning for the strip, front ends strapped down, etc...*

Only time(slips) will tell, I guess.....

I looked up Lorcan's racing site because he hasn't posted in a while, he appears to be doing fine.
In the list of people he's hooked up with is this guy.

www.dragzine.com/news/video-the-insane-j...otorcycle-in-action/

Kinda like being the human nose cone on an ICBM, I would think.....not very practical for a street bike....

Back in the mid 70's I ran the AMDRA series in the Super Stock class......blueprinted stock parts motor with header, gearing, struts, road race slick. Lowered National record to 11.22...but a 750 H2 lowered it into the 10's before the weekend was over! I had the Stock Eliminator National points lead going into the last 2 races on the west coast, but the organization went belly up.

I remember all the hype around 83 and 84 about all the magazine's stock "10 second" bikes, starting with the mighty V65 Magna at 10.71.
I also remember summer of '84 talking to a couple of guys returning from a weekend of stock bike racing at our nearest 1/4 mile track. Both were on 84's - a 750 Interceptor (magazine at 11.5's) and an FJ1100 (magazine at 10.5's).

The BEST time the owner of the Honda got was 12.6's. The BEST the FJ owner did was 12.2's. Both were experienced riders in what I would call typical summer conditions for around here - hot and humid. Both had 60' s in the 1.8 - 1.9 range on a few runs. The owner of the FJ was furious that he only beat the 750 by 4/10ths, despite weighing 10 lbs less than the other guy.....

So, clear lesson in the vast divide between "magazine" times and what an average stock street bike with a competent average rider will actually do.....

I got my '82 Spectre 1100 almost 3 years ago, whoever had worked on it before didn't put the caps over the pilot jets and that took me some time to figure out.

Once I had it running better I went out on a back road and using the performance app on my phone made a run with to see what it'll do.

It came out with a 1/4 mile time of 15.83 after what I thought was a bad start.

I was telling my Dad about it a couple weeks after I did it and my Mom walked in just then and she wasn't too pleased to hear that.

I was quick enough to tell her that was the figures printed in a magazine the PO had with the bike.

I'm not to sure if she believed me or not......