How to tell if my bike is restricted?

[slloyd]

For some reason while riding back from BAT MOTORCYCLES in Biggin Hill this morning, I opened the bike up a little, and just felt there wasn't the power I was expecting, and the rev counter was around 7k "I think" while doing around 60mph, and the engine note was high.

Could my bike be restricted? I don't have a certificate to say otherwise, or is this normal procedure.

How I can carry out an eyes only check to be sure?

Thanks.

[hob]

Which gear?

[slloyd]

If I remember rightly, I was in 5th gear. Going out again to double check my gearing and this problem.

[bskie2000]

if u were in 5th gear u should have been doing bout 70-80 if standard gearing. basicly in 4th gear what ever the revs are, X 10 and u have the speed. ( with standard gearing) so sounds like might be geared wrong. it being restricted wont cause it to rev high.

[gettin2dizzy]

Just get out on the M25 and see what the bike can do. If it's still accelerating nicely at 100 then you'll be unrestricted. I think 33hp bikes max out at anything from 95-110mph.

Good set of bends up Biggin Hill, but I'm yet to get there when there's no traffic (or branches on the road!)

[gettin2dizzy]

if u were in 5th gear u should have been doing bout 70-80 if standard gearing. basicly in 4th gear what ever the revs are, X 10 and u have the speed. ( with standard gearing) so sounds like might be geared wrong. it being restricted wont cause it to rev high.
It sounds nothing like a gearing issue tbh.

[slloyd]

Looks like I was in the wrong gear, hence the high engine noise.. Just come back from a ride out and all seemed well this time around. :riding:

Yep, good test of cornering over that way, on those S bends - it's helping me out on my corning and roundabouts.

M25 could be the next calling, but those winds are still a little choppy at the moment, so a little wobbly at high speeds ;)

[Sally]

A speed test would tell you defiently tell you if its restricted.
On youre private runway of course.

[JonnyBateman]

Reading this has just made me start to wonder. On saturday I touched on 100 and it didnt seem to want to go further but it could be down to riding into the wind and my brain stopping my wrist wanting to move because I'm not used to that speed.
I wouldn't know enough to know the difference probably, and son't really want to try pushing it faster than this yet. Think I'm just being paranoid though! Wouldn't the log book have a stamp to show restriction or something?

[joshmac]

Does it stop accelerating as much when you get to 7.5-8k rpm?
That would indicate that it was restricted.
As others have said, a speed run would tell you, but you risk losing your license if caught.
Have you given the dealer you got it from a call. They might be able to tell you.

Basically there are you ways to restrict the curvy SV.. either with different sliders, or with washers in the inlets.

To check for the washers: Get the tank up, airbox off, loosen the clips on the inlets and lift the carbs up. You'll be able to see the washers if they're in there. If so, just take 'em out and either sell them or give them to someone on here. ;)

If they're not there, it doesn't mean it's not restricted, but if they are then it is for sure.

Put everything back together as it was when you're done.
Give that a go and post up with what you find

HTH

[joshmac]

Wouldn't the log book have a stamp to show restriction or something?
No AFAIK

[Graciepants]

Wouldn't the log book have a stamp to show restriction or something?

nope nope nopey nope apparently you don't even need the certificate. the only way you'd know my bike was restricted is that you can only pull the throttle back about a centimetre (and it goes about 2mph top speed)

[JonnyBateman]

Oh well, I think I'm just being paranoid really as the dealership where I bought it sold it new to the one previous owner, I think they would've mentioned it.

The reason for it not going over yhe 100 mark was most likely me being a pussy!

Ill beast it a bit at the weekend :mrgreen:

[Sally]

On you're private track of course?

[JonnyBateman]

On you're private track of course?

Yeah in my really really loads miles long garden ;)

[Sally]

Good, gotta keep things legal y'know.

[JonnyBateman]

Oh aye. Joking aside though, if I'm working on the basis that a restricted bike won't pull any more abouve 8000 revs, I don't need to be speeding to carry out the aforementioned "beast test", right?

[JonnyBateman]

basicly in 4th gear what ever the revs are, X 10 and u have the speed. (with standard gearing)

...Or maybe I do?

[pencil shavings]

Good, gotta keep things legal y'know.

I didnt know it was illegal to post on a forum that youve commited a traffic offence? whos to say you arnt just lieing because you think its making you look cool? not illegal to lie either (unless under oath, maybe under caution but i think you can still lie and they just dont like it, but not illegal as such, cant exactly remember)

anyway, its not like youre putting a video on youtube showing who are you then you commiting an offence, which would be daft. :rolleyes:

[joshmac]

Oh aye. Joking aside though, if I'm working on the basis that a restricted bike won't pull any more abouve 8000 revs, I don't need to be speeding to carry out the aforementioned "beast test", right?
That's right. Unless there's something wrong with the bike in de-restricted form.
If you have a look under the carbs you won't have to even start the bike ;)

[JonnyBateman]

No carbs up in this ma', gots me a k5.

But... when I take things apart they stop working anyway haha. I'll get around to learning how to tinker and spanner some day but I haven't yet!

[joshmac]

Oh sorry. Thought I was referring to the OP

With a K5 you could check the part number of the ECU. That'll tell you if it's the full power one...

[JonnyBateman]

That sounds more like it ;) Cheers for the advice mate!

Jonny