My zxr250

**Buddy L** · 28th May 2006, 21:21

I just thought
that ill post a video of my bike
make the rest of you cream your pants.

Its a 1989 zxr250, 50,000kms, all original fairings

and is quite tidy for its age.
Had to take off that muffler to hear what it realy sounds like!
it makes 34hp at the rear wheel, so its still got a little poke left in it.
Had it for the last 2 years, have got my full licence now but not enough money to up grade a 600cc just yet.

**N4CR** · 28th May 2006, 21:29

Hahahaahahah you freeeeaaakk o' nature! Funny vid.

Nice one man, I love that sound of a canless inline 4 250... zxr of course. Sounds so fuckin mean, I got a rather gutted can with similar sounds - no packing and entire baffling tube/system taken out it's just an aluminium holder now...

You get alot of looks riding around with the really loud cans on these, everyone thinks it's a race bike or something. don't let the popo see you though

My current can is alot quieter but still screams enough to hear it fine. Nice vid.. cheers.

**paturoa** · 28th May 2006, 21:30

is that a proper bike (KDX) at the end?

**Buddy L** · 28th May 2006, 21:38

yer that was my old dirt bike "kdx220" picture of bike is my profile.
i now ride a cr125r.
i had to cut the video down from 25mb to only 4mb so i could fit it on the posting, the rest of the movie had me at the drags, and also dirt bikeing at the beach. with music in the back round all that stuff!

**Buddy L** · 28th May 2006, 21:42

ill try and post the one at the drags, managed to to a 14 second pass. beat a gsxr1300 to the 60 foot mark. sticking to the big bikes

**vtec** · 28th May 2006, 23:29

Was that a 14.0 second pass or somewhere else in the 14's? Always interested to hear real life experience of quarter mile times, so I can keep collating in my head what different bikes are capable of under real world circumstances.

**Switch** · 29th May 2006, 01:35

hahahah nice video. And a VERY nice bike

**Buddy L** · 29th May 2006, 18:22

it was a 14.745s @142.5kph
that was my first time at the drags, haven't been again.
that pass had a reaction time of a snail with 0.876s

60 foot time was 2.254s
1/8 of a mile was 9.321s
all of that was done with alot of cluch slipping
could get a faster time if wasn't picking my nose at the start line.
if the maths is done right the bike can manage a high 13second pass,

**Brett** · 29th May 2006, 21:51

LOL...love the sound of the canless bike...very very nice. Most amusing at the end too.

Question: Does having no rear can...ie no back pressure pose any threat to the motor? Could it cause it to run lean or anything like that?

**Buddy L** · 30th May 2006, 21:51

I don't know about the back pressure, it depends what the motor is used for i reckon, maybe for drag racing i dosn't matter as much because you are only fully tit all the way, for track use most bike are tuned with the exuast in mind, and it helps to suck out the burnt gases better than if their was none, probley helps with engine breaking as well.
maybe but don't quote me on that.

**N4CR** · 30th May 2006, 22:18

Been covered quite a bit, you shoulllllddd get enough backpressure from headers and resistance alone BUT you will loose your low end almost completely, my empty can makes the bike have all it's power up top, seems a little more but small usable rev range, it is tuned for a slightly more backpressured version of that can. Hardly goes at all with stock on, can't run properly or quick etc.. strangled. Ricky had a moan about being hard to tune with no back pressure so I replied 'WHAT SORT OF POOFTER RIDES DOWN THERE ANYWAY'. He got the message.

Some back pressure is good, none.. hrrmm in rare cases might get feathered valves. I can't be fucked searching kiwibiker but search 'back pressure' and see what come sup. Or backpressure... meh. Have fun.

Aeroplanes often have headers going straight into the atmosphere, spitfires, cessnas infact most planes have no silencer at all... just a straight pipe. But they don't have .5cm wide valves...

**Buddy L** · 30th May 2006, 22:24

I also bunged a video under the off road forums, under Beach Blast if you wanted to have a look. im going to be making more of these little movies, so any feedback back would be good, what to to better next time and so on,
i no that music in the back ground would be god but it fills up to much space, and can only post the 4mb aloud.

**crshbndct** · 7th June 2006, 22:38

Originally Posted by Buddy L

it was a 14.745s @142.5kph
that was my first time at the drags, haven't been again.
that pass had a reaction time of a snail with 0.876s

60 foot time was 2.254s
1/8 of a mile was 9.321s
all of that was done with alot of cluch slipping
could get a faster time if wasn't picking my nose at the start line.
if the maths is done right the bike can manage a high 13second pass,

your e.t. does not include your reaction time