Anybody with restrictors in ever been dyno, d by plod?

[Ribenapigeon]

I was reading a thread in general bike chat on the idea of a selectable restrictor. So it was full of all sorts of speculation about what might happen if someone was stopped by plod. So im wndering how often does plod actually dyno test bikes or otherwise investigate restrictor setups, has anyone actually been through such a process?

[RhynoCZ]

Legal question, if you've got restricted motorcycle, you get an certificate and some sort of seal on your carburetors/dfi units/ecu's and so on, right? So, I wouldn't be worried if my bike was any faster than the paper claimed.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[nowhere.elysium]

[Kickstart]

Hi

Doesn't matter what proof you have (and the FI certificates are not legal proof and really nothing more than a receipt), if the bike has a net power output of more than 25kW (ie, 33hp) then it is illegal to ride.

Reality is that there is no real way to rolling road a bike to find the net power output (which is almost certainly meant to be the crank power figure), although they can probably come up with a rough figure and if more than a bit over 33hp the courts would probably convict based on it.

Not aware of any restrictor kits having a seal on the carb or cdi, but entirely possible some do.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Rogerborg]

This has been asked a few times, and the answer is "almost never".

I'm aware of:
One chap on here (keep forgetting his name) who was done after stacking his unrestricted bike into a gate and hospitalising himself.
The infamous SV650.org thread.
And occasional tales of Operation Pedboi Sweep where peds (and only peds) are put on a rolling road and riders done because they can spin it up (unloaded?) to more than 31mph / 50kph / 30mph / 45kph or whatever the current C&U regs and AM license limit happens to be that afternoon.

Risk-wise I'd consider it a statistical non issue. You're far, far more likely to be SMIDSY'd on any run.
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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

[Wafer_Thin_Ham]

[Pete.]

It does happen though. A couple of dyno operators have told me that they have been requested to put a bike on the dyno to check the output. One guy got a police enquiry about the effect of a powercommander fitted to a bike which had been in an accident.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Ribenapigeon]

I wonder if following the new rules creating a whole generation of young bikers riding on restricted bikes the police are going to up their game in this area.

[nathan k]

[Pete.]

I can't see how they could seize a bike based on dyno wheelspeed given that the biggest force acting on a bike to curtail it's speed is wind resistance which isn't preset on a dyno test. I should think that there's more to it that just that.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[Kickstart]

Hi

I agree Pete, although possible they were just working on the basis that a ped rider was too young to know when he was being stitched up.

A fair few modern 50s are restricted by a speed limiter, rather than just by having insufficient power to do over "30" (or whatever the exact current limit is).

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Rogerborg]

Peds have always been a bit funky. The wording is "design speed", which means... who knows? I'd agree with it just being an easy collar to make up numbers. But you'd be a mug to fess up to Otherwise Than In Accordance, and potentially no insurance and C&U offences as well (since they're claiming it's not a ped) given the tiny chance of the CPS actually prosecuting and winning it.

It's sad that I'm going to have to have The Conversation with my kids where I tell them that police are not their friends and that if they are in any doubt they should say nothing except "where's the duty solicitor?", but there we are.
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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

[suburban myth]

Does the whole 'selectable restrictor' thing have any effect on insurance. Has to be declared as a mod, you borrow wife's wheels, switch the power back on and go through a shop window. I suspect you'd be in a bit of insurance trouble.

[dydey90]

If you read the original thread, we were talking doing it subtly so that it wouldn't be obvious that the bike was unrestricted.
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This post is probably not serious and shouldn't be taken literally.
Past: CBR125,ER6f NINJA 650, ZZR600 Current: VFR750