Standard NTV600 Revere dyno chart anyone?

[sear]

Hi again,

I'm going to be doing a homebrew throttle stop restriction and was wondering if anyone on here had a (or could show me a link to a) dyno readout for a stock NTV600/650 so I know how far to restrict please?

( I am going to restrict further than should be necessary then take it to get dynoed at some point)


Thanks,
Dan

[thatsawkward]

Got one in an old 1988 road test magazine - happy to photograph if nobody has anything more accurate?

[De Graaf van Salland]

Found the graph below on this website: www.bp77.de/ntv/ (Look under "Leistungsdiagramm").



GvS

[sear]

Thats great, thanks guys. So for now, to be on the safe side, Ill probably restrict the throttle by about 40 - 50 % just to be sure. As long as I can cruise comfortably at 60 for 2 years I'll be happy. Plus I never really want to open the throttle much more for the sake of fuel economy and giving the engine an easy life, then I've got a lot to look forward to when drestricting. Ill experiment but will always make sure the bike exceeds the level of restriction needed to be legal. Don't want to stick it bang on 33bhp and risk dynoing at 34bhp at a later date.

Thanks for the help! This forum is amazing.

[rj2para (Bisto)]

Hi sear,

Pleased you like the forum, but take care with DIY restriction as I think you will find you are breaking the law.

I have given myself a task of finding a clear answer; but as yet the only way I have found to be sure, is to have a certificated restriction kit fitted by a commercial mechanic.

If your DIY restriction does prove not to be legal and you have an accident your will invalidate your insurance, making you liable for fines and legal /damges claims from third parties.

For the sake of approx £200 it may be easier / safer to get a certificated restrictor fitted.

I appreciate it is £200 you may not have but the risks may merit saving up.

Failing that write (don't phone) to the Police and when you have their reply in writing, you will then have a definative, evidence based answer on which to make your decision. Rather than well meaning forum understanding.

ATB

Rj

[sear]

The certificate, to my understand after VERY extensive research, is simply for the sake of insurance. I am going to restrict, photograph and get a dyno readout and even carry the tools with me to take the tank off and show the restriction on the side of the road should I need to. I don't have £200 to spare and for what you get, it is an appauling amount of money. you get a set of washers and a document with no legal purpose whatsoever and that sickens me so there is no way I would ever give them my money.

I am planning to drop a letter round to the police station on monday if I can.

[Jaz66]

this seems to suggest that a dyno reading £30 would be acceptable.

blackmotorcycle.webs.com/

www.motorcyclenews.com/MCN/News/newsresults/General-news/2009/November/nov1309-The-33bhp-certificate-rip-off/


all the best.

[sear]

Thanks man,
I understand people want to recommend caution, and I am going to be cautious just don't want to waste a LOT of money unecessarily. I have contacted my local police department by email and will also pop round tomorrow afternoon in person to ask what the deal is and ask if they could put it in writing for me.

I will then take the bike to get a dyno readout and also ask the person conducting the dyno run to sign a statement saying that the bike is restricted with a time/date/place. I'm pretty sure this'll be adequate and it will save me some serious money.

[De Graaf van Salland]

Jan 29, 2012 20:54:38 GMT 1 sear said:

I will then take the bike to get a dyno readout and also ask the person conducting the dyno run to sign a statement saying that the bike is restricted with a time/date/place. I'm pretty sure this'll be adequate and it will save me some serious money.

Hi Dan,

If you want to do this (I'm not saying you should....), then I would also recommend to find a dyno bench that has been calibrated by a credible institute & ask for a copy of the calibration papers.

GvS

[McF]

Jan 29, 2012 20:54:38 GMT 1 sear said:

I have contacted my local police department by email and will also pop round tomorrow afternoon in person to ask what the deal is and ask if they could put it in writing for me.

I have doubts this will the the solution you want, but if the police are happy to put it in writing that is half of the success for you, but you must also discuss this with your insurers and get them to agree in writing too.

At the very least it is a modification to manufacturers spec and they need to know about this

Good luck

[sear]

All was fine with the insurers actually, I was really pleasantly surprised with their response which was: The only evidence necessary for them is a headed, dated and signed document stating that the bike is sufficiently restricted which is great.

I also have had a very very useful email conversation with a policeman/bikesafe rider etc. who has basically confirmed that if I can get a garage to confirm that the bike is restricted appropriately then that is sufficient.

The actual method of restriction HAS to be 'permanent' or unadjustable if that makes more sense, so not something where you could leave it on to make the bike look legal but adjust it so it produces more power,

But, other than that the actual method of restriction is unimportant, so long as a garage will confirm that it is restricted. So, great news. The guy I spoke to was great, really clear and it all makes sense and I feel confident that I know where I stand.

[rj2para (Bisto)]

Well done on doing the legwork. And the best for your restriction.
It would be interesting if MCN would publish your findings.

The cynic in me, thinks flexibility in the area, can only lead to confusion and a law which is difficult to understand or enforce.

Still we done you. I am pleased you have a solution your are confident of.

ATB

Rj