Kawasaki Er5 Sport Exhaust and 47hp

[Laners99]

Hi, first post but I decided I had had enough of a YBR so decided to get a big bike and a licence (in that order because there was a decent deal nearby). The only small problem is that I bought a Kawasaki er5 which I will need to get restricted down to 47 hp. Recently found out it has a sports exhaust which I'm worried will still take it slightly over 47 even after its restricted. Do you think this could be a problem or should I just not worry about it? Thanks a lot!!

[stinkwheel]

If it hasn't been set up for it, the exhaust is probably reducing the peak BHP anyway.
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[orac]

get it fitted, you get the certificate, after that, doubt anyone will care enough unless you get caught doing something stupid.

also the amount of extra power just an exhaust is going to add will be nothing if it doesn't take power.

as a side note, the so hated GS005 I had, had an open pipe, K&N filter, up jetted, ignition advance and still didn't produce a appreciable amount of extra power. but those combined with a 1 tooth smaller front sprocket improved torque which helped while 2 up.
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[Laners99]

Tbh I doubt it will give any power but even if it is 48 hp technically I'm not licensed, I don't really care, but it's the kind of thing an insurance company or upset police would jump on. Think I'll get it restricted and then decide then

[CBRMAN94]

Restrictions before engine, not after so i'd say it wouldn't make a difference
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[Rogerborg]

It only claimed 36.5kW as new. Even assuming that number was ever accurate and that it's in full as-new working order, any restriction needed would be absolutely minimal. In practice it could probably be achieved simply by introducing a tiny bit of slack into the throttle cable.

I'll bet my 3rd best lid that if you order a £60 "35kW restriction kit" then what you'll receive for your money is two washers with either "25kW" sized holes from pre-2015, or just big random holes drilled in them - the actual washers should be almost, but not quite, entirely not there. The other £59 buys you a piece of paper with "IS TOTES LEGIT 35KW OFFISHUL" on it.

The infamous SV650.org bike-seized thread suggested that the threshold for criminal prosecution is a dyno reading more than 10% over the limit. That's not going to happen, even with your racebike exhaust.

For insurance, what you need is (at most) the "35KW LEGIT" paper. You have access to a printer, right?
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[mudcow007]

Is that a DT in the background?

[Laners99]

TBH er5 is really borderline 47 bhp and I don't think the govornment can provide a definit answer, they seem hopelessly incompetent about this issue and it would depend on what mood a Police was in at the time, even putting a dirty air filter would do the job!! And yes, it's my Dad's DT that he's been doing up over the last few months

[talkToTheHat]

Fit token restrictors. Carry photocopy of certificate. Don't ride like a twat in front of police cars.
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[pompousporcup...]

Almost certain they're the same carbs as the gpz500.. i actually have a set of restriction washers.. I'l mail them to you for free, just drop me a PM.

[Rogerborg]

Helpful, but the restriction required on even a fresh-from-the-factory Er5 would be absolutely minimal. GPZ washers (even if they're actually 35kW rather than 25kW) would seem likely to drop it down a fair bit more than needed.

And even if he's going above and beyond compliance with the law, it's more likely that he'll be asked to prove it rather than made to prove it, so the TOTES FISHUL SERTIFKUT is more likely to be of use, if you have that.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[hmmmnz]

id be tempted to go to a dyno place and get them to do a dyno run on it,
i doubt you'll be over the 35kw max any way. in stock form they were rated to 49hp, when brand new!!
get a print out, bobs your uncle

https://images.delkevic.co.uk/product4160_27b.jpg
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[talkToTheHat]

Dyno print is not sufficient legal proof of restriction. However it is sufficient proof of not being restricted enough. Why? Because a dyni run at half throttle or more advanced fersions of the same can be used to lrove almost anything, including "the bike came out of nowhere and leapt to a standstill innfront of me, honest, officer"
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Bandit. does. everything.

[Rogerborg]

[Matt B]

[Rogerborg]

The only winning move is not to play print off a PaddyCert^tm.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Laners99]

Update, just had a lesson today on an ER 5 and the instructor said they fit a token restrictor and the garage stamps a certificate so this is what I'm going to do and not worry about the exhaust as long as I tell the insurance company.

[Rogerborg]

[andys675]

fi international were part of BLD group who went bust last september, so selling restrictor kits doesn't earn a living
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