DRZ400s 33bhp?

[UKRedwing]

Hey guys,
I insured my DRZ400s 2002 last week and my insurance has just sent me through a letter asking for copies of the usual stuff like my license and no claims but it also asked for proof or confirmation of 33bhp restriction (Will have passed my test 2 years ago in 2 weeks)

My question is this, is an 02 drz400s more than 33bhp? It doesn't have any performance mods.

Thanks

[deleted111]

Yes, as far as I'm aware the DRZ400 is over 33bhp, but not by a massive amount. Restrict the throttle a tiny bit and dyno it to shut them up? Forge an FI whatsamajig?

Don't fret fella, there's options.

[bombom]

Engine: 398 cc, four-stroke, single cylinder, DOHC, 4-valve, liquid cooled. 48 hp (35 kW)/ 9,000 rpm, 41 Nm/ 7,500 rpm. Kickstart only.
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[Wafer_Thin_Ham]

Don't need to forge anything.

Ask them if they'll accept a dyno print out (they should) and then dyno it. I think it's 38bhp claimed from memory, so it should be putting out around 33 at the wheel. Prey it's just under (or put a heavily used spark plug in. )

EDIT - A quick google seems to show graphs between 32 and 38 bhp.

You could simply send them one of those, but that would be highly illegal and I wouldn't be surprised if they check for such things.
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[Wafer_Thin_Ham]

[UKRedwing]

[deleted111]

Hmm. Just a thought - how long have they given you to get this proof of restriction to them? If it's any longer than 2 weeks then I'd not bother with it until then...

But having thought about it, when they wanted my licence they only gave me 7 days to get it to them.

Just a thought.

[Wafer_Thin_Ham]

[Sam_Y_93]

Just a thought, not sure if it will work but you could try and find a friendly garage give them a bit extra on top of a dyno run and get them to put the brakes on the roller (assuming a bike rolling road works the same as a car?) until it shows up a 33bhp run?

Most likely be told to fvck off but might be worth a go...
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Bikes Current: Honda VFR 400 (awaiting restoration) Honda CB600f F-4
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[UKRedwing]

Ok guys, think I will get it dyno'd and hope it comes out at under 33bhp.

I have 7 days but an option on the letter to mark is as 'to follow'
Will probably ring them and see how long I can have to get them a dyno printout

[bikertomm]

I'm interested in what the DYNO will say, keep us updated


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[.Chris.]

I overheard a mechanic in a local bike shop talking to a customer on the phone about 33bhp and a DRZ400. From what I gleaned from the side of the conversation I heard, the guy was getting the bike dyno'd to see if it was under 33bhp, which it (just) wasn't, but that tweaking the throttle cable so that it couldn't quite fully open the butterfly brought it under 33bhp.
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Chris
1985 Kawasaki Z550F

[UKRedwing]

Ok thanks alot everyone for your input, putting the standard airfilter back in it tomorrow morning then I will get it booked at the dyno centre afew miles from me, they are pretty friendly with the bike shop I work at so hopefully I can get a good deal and they can fiddle the throttle cable or something like you've suggested to get me under 33bhp.

Will report back with the dyno printouts, work is getting a full titanium arrow system in for the drz next month with a dynojet kit and I'm opening the airbox up to 3x3 so it will be going back in for some dyno time so will be interesting to see the difference then

Cheers lads.

[Polarbear]

If you dont need it for work, why don't you just wait the week or so till your 2 years is up. If you have insured it as 33bhp, your going to have to tell them and pay more anyway or you can't de restrict it.

Tell the insurance you won't be riding it till your 2 years is up and you want the relavent insurance from then.
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[UKRedwing]

[Polarbear]

[UKRedwing]

[HD]

When is it booked for?

May get myself a drz some time next year or the year after I think.

Either that or a wr250
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[Charlie]

[UKRedwing]

[Rogerborg]

Hang fire, chumrade.

First, did you agree to this as a condition of your insurance? Remember, it would be perfectly legal to ride it at 48bhp - or 480bhp - while doing Accelerated Access training.

Second, have you checked that they'll accept a dyno print out as evidence? They might think that only FI scamtificates are acceptable.

Third, why are you paying for it? They're the ones asking for it.

Fourth, did they really say "proof or confirmation"? If so, go ahead and "confirm" that it's not making more 25kW. That might be all they want from you - have you asked?

If you do go ahead with the dyno, you could try putting as much slack as possible in the throttle cable, and if it's dual cable, tighten up the return cable, maybe pop some washers on it. Undergap the plug while you're at it, stick a sock in the air filter, there's loads of ways to nobble it for a dyno run - which is why it's so bloody pointless of insurers to ask for "proof".
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[Kickstart]

[P.]

Surely you could just grab a washer, drill any old hole, put in for dyno... it may come out at 21hp but hey.. its below 33hp

[sebastianw]

[UKRedwing]

I'll probably reply with 'confirmation' that the bike is 33bhp along with copies of my ncb and license, if they ask for proof I can send them the dyno print out when it's done tuesday, don't see why they wouldn't accept it as proof, theres no way I'm going to pay FI international for a metal washer and a piece of paper.

I want to dyno it anyway to see the difference once all the performance mods are done so it doesn't really matter. Plus the guy is only charging me about £30