zxr 400 @33 bhp???

[jon88]

hi im looking at buying a zxr400 though i will have the bike ristricted to 33bhp as im only going to be 17, i was talking to a friend and he was saying with it being a in-line 4 i will have very poor performance when it is ristricted (dont know if it will be that bad) , so he was suggesting to look at something with a v formation such as a rvf or a vfr.
so the real question i suppose is, does anyboby here have a ristricted zxr 400 and whats it like?
thanks Jon

[Flip]

All restricted bikes have poor performance... they're restricted. A V -twin won't be any better.

[Frost]

He is reffering to engine characteristics.
The bike would be limited to a maximum power output of 33bhp, effectively making it lacking in top end power. A bike with a V4 engine configuration will have butter low down and mid range power so it will be easier to ride and potentially quicker than a restricted in-line 4.

In reality the difference won't be great, far less than the effect gearing would have. If you want a ZX4, get one and get it down geared when you have it restricted and it's performance will easily match, or probably beat that of a restriced VFR.



...or you could just not bother getting it restricted at all, which seems to be the popular choice.

[Going2fast]

...33bhp restriction eh
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[The#Doctor#]

Get it restricted, keep the certificate in a ssfe place and remove the restrictors, put them back in at service times as no stop check would ever uncover that the bike is not restricted as it can be restricted in different place ie throttle carb etc and you will have the certificate to prove that it is restricted hence me buying a cbr600fi at 18

[Sparks!]

ZXR is fine with restrictors.. mine still went fast enough, still good acceleration and generally fine... they are better derestrict though, all bikes are.. but ZXR's handle restrictions fine.. (well, mine did anyway)
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[mr.z]

Yeh they go fine restricted, fairly light and enough grunt to keep you going...

Thing with Vtwins is they are no more powerfull than a 4 lowdown, they just seem like they are as thats their strongest point, whereas a 4 will reach peak power further up the rev range where a twin will have trundled off... V4 is the best of both worlds but its just the runing cost and difficult maintainance..

They did make a zxr250 version though i think (probably import and quite rare).. closer to 33bhp... if you do use the restrictors then to be honest chances are you will want to change your bike after two years... if you dont plan on leaveing them in then buy whatever the hell you want

Look at the bandit 400 and the zzr400/600 too, the cbr 600 is another very good option restricted (ask laura)
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[Sparks!]

[jon88]

thanks for the help,
thats the thing, i probably wouldent get the bike risticted but it will be my first (potentialy) fast bike and i realy dont want to go and flip it or go and kill myself, but would probaly take the ristrictions off when im use to the bike.
My mate was saying that the V will produce allot more tourqe low down so will have much better acceleration, dont think i would be bothered with changing all the gearing
i much prefer the looks of the kawak over both the hondas and they seem more avadable to get hold of parts for.
so im probably looking for one now if ant one happens to be selling one
thanks again
Jon

[BikerBen]

Go for it Jon They are lurvley (I am not biased ) Get it restricted, get the certificate to say it is restricted, ride it for a couple of week to get used to it, then whack the restrictors out! WOOO!!
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Now proud owner of a 1999 ZXR 400

[Flip]

I would have sold my restrictor kit to someone off here but I can only find 3 of them. Doh!

[distortion]

the mrs's zxr is restricted, handles and rides like a beauty. the power is there from the second you open the throttle all the way to 12k revs. Only had it to an indicated 110 mph with the mrs on pillion so i think its got quite a bit more.

The fact that theres a few bits of paper that say the following things -

62
70mph in 1st gear

this confuses me

but what i know is that there is a lovely piece of paper that states its 33bhp so thats good enough for me

[paulthewitt]

[paulthewitt]

[Flip]

[Frost]

70 in 1st gear doesnt sound very likely on a ZX4.

everybody i know who has ridden both the VFR and ZXR has commented that the 1st gear on the VFR is VERY tall (good for 65mph) so i think 40-50mph for the ZX4's 1st gear does sound about right.

On a 33bhp 400 expect a top speed of 100mph, decent acceloration in the lower gears and a good cruising speed in the upper gears.

Restriction isn't essential as no one ever gets checked up on about it. but if you feel a full power 400 is a bit much for you then i would definatly recommend it.

[distortion]

[quote="DaFrostyOne"]70 in 1st gear doesnt sound very likely on a ZX4.
[quote]

got the dyno sheet to prove it. Although thats with no wind resistance im guessing, only saying what the sheet tells me

Dynojet's model 100 dynometer

RMD - Derby

70mph - 1st
90mph - 2nd
108mph - 3rd
120mph - 4th
135mph - 5th

Max HP - 62BHP

Max Torque - 27

[Ric]

what happened to 6th gear?

and at about 11k revs mine does 100 in 4th so seems similar

[Frost]

[Ric]

makes sense

[distortion]

Might have to ring them up on monday and ask how they actually do the dyno run. Whether it is from 1st or 2nd gear.

If i remember correctley a mechanic friend of mine had a look through all the sheets. After a number of hmmmm's, oooooo & rrrrrrrrr's he came up with the 135mph being in 5th gear and said that 6th would probably be 145mph to be fair. Said he was quite impressed with its performance !!!!

Well its going on the dyno again on the 7th at bikerz - Midlands dyno run in our 'Midlands World' section lol.

So once thats done i'll let all know how it compares to the dyno run its already done. Might even try and get someone to scan the sheets for me so i can get em on here.

[JonB]

145MPH on a 400cc, is that possible?
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[NY_Sniper]

i got a ZXR400 restricted and seeing as i moved from a 50 it feels fast as fuck rode it 4 a while with out the restricters and when i put them in i hardly felt any difference
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[distortion]

[Frost]

145 isnt possible on a standard 400. the only way would be with engine work and taller gearing. which of course no one has as typically people downgear when they do engine work.

When you do the dyno, count the teach on her sprockets to see if they are standard or not.