33bhp biggest engine that can be restricted.

easyrider63 · L Plate Warrior Joined: 28 Mar 2010 Karma :

can any body tell me the biggest engine that can be restricted down to 33 bhp without affecting the power to weight ratio to much .

That_Hornet · World Chat Champion Joined: 23 Apr 2009 Karma :

Anything can be restricted to 33bhp.

I think if your looking for a 33bhp bike to go fast, i would pick one that is 33bhp or as close to as possible.

-Savage- · World Chat Champion Joined: 10 Jun 2005 Karma :

Fitzy · Nova Slayer Joined: 20 May 2008 Karma :

Ingah · World Chat Champion Joined: 10 Apr 2009 Karma :

Ingah · World Chat Champion Joined: 10 Apr 2009 Karma :

0.16 kW/kg is the legal limit.

25kW is the other legal limit (it's over 33.5BHP), so based on this the motorcycle you are riding, if it puts out EXACTLY 25kW, is allowed to weigh no less <- (edited as i put the wrong word) than 156.25kg. However, the definition of the motorcycle (i.e. whether fluids, tools, etc are included or not), will influence this. And no, it's not crystal clear in law because the 25kW restricted law was a badly thought out piece of rubbish that should never have been passed in its current form. Regarding the "maximum", i'd say it's more a case of how slow do you want to go?

I can't see a logical reason why any engine size can't be restricted down. It may make them run badly, but hey, anything's possible.
____________________
-- Ingah

Poseidon · World Chat Champion Joined: 15 Aug 2008 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

You are right. It is a limit on power to weight ratio. More power or less weight could put you over that limit.

All the best

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

Alexio · World Chat Champion Joined: 27 Aug 2009 Karma :

Which means there are potentially people riding within their restriction of 33BHP but still breaking the law on the smaller 2 stroke bikes because they are so light?

I doubt anyone has ever been charged with this though.
____________________
will never give up his CG. I look at my fuel gauge more as a progress bar than a fuel gauge.
G: With my GSXR I do often effectively use it as a scooter with a clutch in town.
ms51ves3: why does it need 500 miles? Are you teaching it how to be a piston?

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Grubby · Spanner Monkey Joined: 15 Aug 2004 Karma :

If you're interested my lad has a Bandit 650 that he rode restricted & it was OK I guess. It made a hell of a difference when I took out the carb restrictors after he'd "Done his time".
The advantage of doing this is that you get used to riding a decent sized bike & you can modify it as you like over a period of time, which he did, so that when you do finally get to remove the restrictors you have a bike that is how you like it as you'd have owned it for a year at least.
Otherwise you wind up buying two bikes & lose out twice on depreciation.
____________________
I am me & you are he & we are all together. See how they run like pigs from a gun!