tuning zxr sp race bike

swadger25 · Post by **swadger25** » Tue Mar 21, 2006 12:54 pm

i have a zxr 400 l sp and going to race it ! wondering about desrstrikers ? exhausts and susspension?? can any 1 help ??

Post by **masterofinsanity** » Tue Mar 21, 2006 3:14 pm

check out the suspension guide on the left in the main menu.

swadger25 · Post by **swadger25** » Wed Mar 22, 2006 4:46 pm

yeah thanks neva noticed that before . lot of good info there thanks so wat can i do to derestrik my bike have taken the mph clock off is there a diffrerent cdi or ???

RedexRobB · Post by **RedexRobB** » Thu Mar 23, 2006 10:43 am

Theres two things you can do, one you mentioned being the CDI, apparently a UK CDI wil do it, or you can get hold of a de-restrictor.

swadger25 · Post by **swadger25** » Fri Mar 24, 2006 4:15 pm

wat one of those mad max thing that plugs in to the clock s ??? where could i get race cdi from?/

richie400ss · Post by **richie400ss** » Sun Mar 26, 2006 10:47 pm

don't bother with a cdi. they cost money and mak no useful difference to your power. a uk cdi will give an extra 400 rpm, but as the torque drops off so sharply at these engine speeds, the power is atually lower. ANY l model cdi is good for racing.

there is no such thing as a race cdi don't believe people who say there is.

engine mods are the way to go for power, but remember that you'll need to do your induction and exhaust mods to suit.

speak to a (reputable) tuner

swadger25 · Post by **swadger25** » Tue Mar 28, 2006 6:35 pm

thanks richie

kris-cross · Post by **kris-cross** » Tue Mar 28, 2006 11:47 pm

Ive never read so much crap!

An L sp has a totally different cdi to the ordinary L model....they limit at 15,300 for starters! and have more electrical gismos in them to alter the ignition timing via a throttle position sensor on the carbs. As for torque and power dropping off

a good dyno man will move these figures up the rev range to make better use of the close ratio gearbox. STOP!! misleading people 'richie' you obviously dont know what you are talking about!!

Post by **diesel** » Wed Mar 29, 2006 3:33 pm

no need to be so negative, he is just giving his opinion, as are u. lets keep it civil.

swadger25 · Post by **swadger25** » Wed Mar 29, 2006 4:57 pm

thanks so best to get to good tuner and they can work some magic cheers

RedexRobB · Post by **RedexRobB** » Wed Mar 29, 2006 6:31 pm

diesel wrote:no need to be so negative, he is just giving his opinion, as are u. lets keep it civil.

Im not sure why, but the racers get well shirty sometimes

Post by **sloweracing** » Wed Mar 29, 2006 8:09 pm

I would agree my engine would carry on till it blows, we now cut out at 15 thousand but the bike continues to hold a flat line on the dyno

Some off the race bikes will rev to 16 thou but it only holds a line it doesnt drop off or go down i will try to send baz a dyno graph from last year

But if you want to talk to a tuner then give Lawerence a ring and he can tell you what you can get out off a zxr 400 safely made some changes for this year and we are now producing 77 bhp but on the race track dyno ( http://www.dynapro.co.uk ) we are now producing a genuine 70 bhp

Hodson Engineering 01732 463658 for details on all tuning work cars and bikes from just skimming to full race engines

kris-cross · Post by **kris-cross** » Wed Mar 29, 2006 8:52 pm

Yes i would agree Simon the most accurate bhp figure is the race track dyno as it gives you a true figure on the day.

RedexRobB · Post by **RedexRobB** » Wed Mar 29, 2006 9:06 pm

I just looked at thier website Simon and i didnt realise they were in Tonbridge, thats only the other side of Maidstone. Looks like they do everything for a blue print and rebore for 444cc pistons too.

Cheers for that link, im sure you've posted it before but they are gonna come in handy for my 444 next year!

richie400ss · Post by **richie400ss** » Tue Apr 04, 2006 7:48 pm

oh dear mr kiss koss.

you really do get yourself in a tiz don't you? Single by any chance?

there is NO SUCH THING AS A RACE CDI. there is however an sp cdi as you state. what i meant was don't waste your time looking for something that doesn't exist.

further, a peak bhp is little more than good pub talk. average thrust is the important factor which can be found by integrating the power curve between the limits of the rev range used by the average gear selection.

also, power ALWAYS drops off beyond a certain point. unless you have infintely and automatically variable cam timing. have you?