33bhp Restriction - SV650.org

03-01-05, 02:23 PM

hi,
im new to this forum, i am about to buy a 2000 model SV650s and by law i have to restrict the bike to 33bhp, i know what a lot of people will say, 'get a smaller bike'! but i can't, i have wanted an SV for too long now, and now i can finaly afford one, i am going to buy it.
I just wondered if anyone else has restricted an SV650? How does the bike run? and will i be able to fit a road legal after market end can (so i can hear the beast when im riding) and still keep it to 33bhp?

Cheers

SPeeeeDY

03-01-05, 02:29 PM

I've not ridden a restricted bike (sv or otherwise) but don't worry about choosing the sv and having to restrict it, lots of people have them like that and it doesn't seem to be a problem.

03-01-05, 02:37 PM

thanks for the fast reply. it was most helpful, i did not know many people restricted these bikes, must be due to the cheap (for what you get) price tag, good looks and good handling, perfect first big bike. I was thinking about a bandit 6, but they are tooo common and its an inline 4 (boring sound!).
I was told that to restrict the bike all i have to do is change the 'ECU', is this true? i always thought to restrict any bike, a washer was fitted to restrict the flow of air/petrol into the engine.
If it is a new ECU that i will require, where can i get one (im from Leeds, UK), how much will it cost, and can i fit it myself?

03-01-05, 02:54 PM

I rode a restricted 2000 sv650s for about 5 months. They used different throttle bodies from Suzuki to get it 33bhp.

What i think these did was to never allow you to get the throttle fully open. Riding along at about 70mph in 6th gear and rolling on the throttle you could feel when it stopped getting power while still twisting round. In theory, you could save yourself £120 (

) and just use a stop on the actual throttle (wont be legal though).

Riding the bike was still really good while restricted. I never felt that I was being held back by it being 33bhp but it was always hugely tempting to derestricted it. I had the original throttle bodies and the instructions on how to put them back in.

I would definately say go for it. I still love the styling of the svs and have always regretted selling it. I never rode it full power and eventually got a TDR250 which has gone now too. I'm thinking about getting an sv650, just love the sound and feel of the v-twin.

I hated being made to ride bikes that were restricted. I had been on bikes for years and years riding them offroad and resented seeing these people doing DAS and jumping onto whatever they wanted. I do see sense thought - Just a bit bitter

Hope you find a good bike and dont let people pressurise you into making full power.

03-01-05, 02:57 PM

Quote:

Originally Posted by SPeeeeDY

I was thinking about a bandit 6, but they are tooo common and its an inline 4 (boring sound!).

The howl of an IL4 at high revs is obviously something that you haven't experienced

Quote:

Originally Posted by SPeeeeDY

I was told that to restrict the bike all i have to do is change the 'ECU', is this true?

Not for the model/year that you're considering - it has carbs, not FI.

Quote:

Originally Posted by SPeeeeDY

i always thought to restrict any bike, a washer was fitted to restrict the flow of air/petrol into the engine.

You will need a restrictor kit for a carbed bike - there may well be other things as well as the carb washers, e.g. carb jets, etc.

Quote:

Originally Posted by SPeeeeDY

............and can i fit it myself?

Possibly/probably, but you might need some form of official (e.g. dealer) certificate to say that the kit is fitted if requested by your insurance company or the

03-01-05, 03:01 PM

Quote:

Originally Posted by Iain

...................and resented seeing these people doing DAS and jumping onto whatever they wanted. I do see sense thought - Just a bit bitter

I'm sure that your resentment was towards the "system" and not those able to do DAS

TSM · 03-01-05, 03:06 PM

As jabba said, if the bike is FI then there is just a small box that fits in between the ECU and the bike, and that is the restriction. When your restriction is up, just unplug it.

On carb bikes you need to get

http://cgi.ebay.co.uk/ws/eBayISAPI.d...e=STRK:MEWA:IT

That will need to be fitted by a garage and get a certificate incase the bob stop you.

From what i have been told, because IL4 make their power high up in the revs a restricter on them will kill the bike, but VT bikes make their power low down so not realy a problem especialy for town trafic.

Its ment to restrict you to about 70-90 but some people here say they have still got the bike up to 115. Probably they have a diffrent rear sproket config.

03-01-05, 03:14 PM

thanks for the replys, i now know for deffinate that i will be restricting the bike. for what it will cost me and the bother it will save if the plod stops me, deffinatly worth it and i suppose since i only have 12months left on my 33bhp sentence, topping out at 80-90mph wont be that bad for one summer.

PS, i used to ride a friends Bandit 1200 (on private roads, of course) and although it was scarily too fast, and it did sound good, it still does not compare to the sound of a thumping V-Twin

Thanks again

SPeeeeDY

03-01-05, 03:14 PM

Quote:

Originally Posted by TSM

As jabba said, if the bike is FI then there is just a small box that fits in between the ECU and the bike, and that is the restriction. When your restriction is up, just unplug it.

It's a completely replaced ECU on the SV, so you'd have to make sure you got your original with the bike.
For the carbed bikes, like has been said, there are loads of ways of restricting them, but getting a certificate is vital, and in fact is the entire point of having it done.

03-01-05, 06:27 PM

Riding a restricted K4 naked and the power is still scary as hell, as it's the bhp that's restricted and not the torque. There are no restrictions that i know of on the torque from a legal stand point, so any restrictio you get is just from restricting the bike for bhp. The k4 is still capable of just about 100mph with a restrictor fitted. But seriously, I managed to crash mine within 50 miles. (At a very slow speed, coming out of a drive and let the rear wheel spin out). It doesn't feel restricted. But I have a change ecu rather than restricting washer.

03-01-05, 02:23 PM	#1
SPeeeeDY Guest Posts: n/a	33bhp Restriction hi, im new to this forum, i am about to buy a 2000 model SV650s and by law i have to restrict the bike to 33bhp, i know what a lot of people will say, 'get a smaller bike'! but i can't, i have wanted an SV for too long now, and now i can finaly afford one, i am going to buy it. I just wondered if anyone else has restricted an SV650? How does the bike run? and will i be able to fit a road legal after market end can (so i can hear the beast when im riding) and still keep it to 33bhp? Cheers SPeeeeDY

03-01-05, 02:37 PM	#3
SPeeeeDY Guest Posts: n/a	thanx thanks for the fast reply. it was most helpful, i did not know many people restricted these bikes, must be due to the cheap (for what you get) price tag, good looks and good handling, perfect first big bike. I was thinking about a bandit 6, but they are tooo common and its an inline 4 (boring sound!). I was told that to restrict the bike all i have to do is change the 'ECU', is this true? i always thought to restrict any bike, a washer was fitted to restrict the flow of air/petrol into the engine. If it is a new ECU that i will require, where can i get one (im from Leeds, UK), how much will it cost, and can i fit it myself?

03-01-05, 03:14 PM	#8
SPeeeeDY Guest Posts: n/a	thanks thanks for the replys, i now know for deffinate that i will be restricting the bike. for what it will cost me and the bother it will save if the plod stops me, deffinatly worth it and i suppose since i only have 12months left on my 33bhp sentence, topping out at 80-90mph wont be that bad for one summer. PS, i used to ride a friends Bandit 1200 (on private roads, of course) and although it was scarily too fast, and it did sound good, it still does not compare to the sound of a thumping V-Twin Thanks again SPeeeeDY

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03-01-05, 02:29 PM	#2
Carsick Guest Posts: n/a	I've not ridden a restricted bike (sv or otherwise) but don't worry about choosing the sv and having to restrict it, lots of people have them like that and it doesn't seem to be a problem.

03-01-05, 02:54 PM	#4
Iain Guest Posts: n/a	I rode a restricted 2000 sv650s for about 5 months. They used different throttle bodies from Suzuki to get it 33bhp. What i think these did was to never allow you to get the throttle fully open. Riding along at about 70mph in 6th gear and rolling on the throttle you could feel when it stopped getting power while still twisting round. In theory, you could save yourself £120 ( ) and just use a stop on the actual throttle (wont be legal though). Riding the bike was still really good while restricted. I never felt that I was being held back by it being 33bhp but it was always hugely tempting to derestricted it. I had the original throttle bodies and the instructions on how to put them back in. I would definately say go for it. I still love the styling of the svs and have always regretted selling it. I never rode it full power and eventually got a TDR250 which has gone now too. I'm thinking about getting an sv650, just love the sound and feel of the v-twin. I hated being made to ride bikes that were restricted. I had been on bikes for years and years riding them offroad and resented seeing these people doing DAS and jumping onto whatever they wanted. I do see sense thought - Just a bit bitter Hope you find a good bike and dont let people pressurise you into making full power.

03-01-05, 03:06 PM	#7
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	As jabba said, if the bike is FI then there is just a small box that fits in between the ECU and the bike, and that is the restriction. When your restriction is up, just unplug it. On carb bikes you need to get http://cgi.ebay.co.uk/ws/eBayISAPI.d...e=STRK:MEWA:IT That will need to be fitted by a garage and get a certificate incase the bob stop you. From what i have been told, because IL4 make their power high up in the revs a restricter on them will kill the bike, but VT bikes make their power low down so not realy a problem especialy for town trafic. Its ment to restrict you to about 70-90 but some people here say they have still got the bike up to 115. Probably they have a diffrent rear sproket config.

03-01-05, 06:27 PM	#10
nuntius Guest Posts: n/a	Riding a restricted K4 naked and the power is still scary as hell, as it's the bhp that's restricted and not the torque. There are no restrictions that i know of on the torque from a legal stand point, so any restrictio you get is just from restricting the bike for bhp. The k4 is still capable of just about 100mph with a restrictor fitted. But seriously, I managed to crash mine within 50 miles. (At a very slow speed, coming out of a drive and let the rear wheel spin out). It doesn't feel restricted. But I have a change ecu rather than restricting washer.