Noise!

Message

szrdave · #1 Post by **szrdave** » Tue Apr 05, 2011 9:50 pm

Any idea how falcos normally fare when confronted with a noise-o-meter?

I'm tempted by the new Snetterton 300 circuit on the 26th, but the noise limit is 105db and the bike has straight through pipes on.

My Yamaha (660 single, loud pipe) is just under 102db, my mates nc30 with a similar can is over 105db so I'd be interested to hear peoples experiences...

#2 Post by **Kwackerz** » Tue Apr 05, 2011 10:16 pm

and the bike has straight through pipes on

I'll have a fiver on it not getting on track. A renegade can with failing packing on an RSV will fail, Im positive a straight thru set of pipes stands no chance.

Aladinsaneuk · #3 Post by **Aladinsaneuk** » Tue Apr 05, 2011 10:28 pm

Depends on what revs they check it on...

At tick over mine is not too bad.... Get to 5000 revs and that's different!

#4 Post by **Kwackerz** » Tue Apr 05, 2011 10:31 pm

It's usually where the dip in the power curve normally sits. Cant remember the revs but I got a lecture on it once...

#5 Post by **Kwackerz** » Tue Apr 05, 2011 10:34 pm

Try that as a guide..

http://www.cadwell.ruffle.me.uk/include/scrut.html

Samray · #6 Post by **Samray** » Tue Apr 05, 2011 10:37 pm

According to a post elsewhere it may go beyond a static test now.

Now they have a DB tester on the home straight somewhere and if this picks you up you are black flagged, if you are then found to have been tested at say 100db then got back to your garage then removed the baffle you are black flaged then sent home. When you are being noise tested i noticed y,day that the guy puts a little tick at the end of the end can think this was if some1 had a baffle in he then put a small mark with a marker pen?? (could always be wiped off with petrol) At lunch time all got called to the pitlane few smacked wrists for this and that BUT biggest thing was the problem with noise if after lunch it picked loud bikes up again MSV would stop the day, some heated comments followed lol fu-k you fu-k this etc etc etc lol At the end of the day its not MSV or No Limits its the council who have set this rule. At Oulton now DB has dropped to 102db, a safe bet now is a standard can.

Tis was talking about snetti btw.

#7 Post by **Kwackerz** » Tue Apr 05, 2011 10:38 pm

as an aside..

Tip; get a bunch of coins and jam them in between the loops of the spring before you take it off -- that way you won't have to stretch it to get it back on again. If the springs on your main or side stand are loose and floppy you'll have to fix the stand in the raised position with lock wire or tie wraps.

What a top tip!!! Should work for exhaust springs too, with washers...

Falcopops · #8 Post by **Falcopops** » Wed Apr 06, 2011 3:38 am

Kwackerz wrote:as an aside..

Tip; get a bunch of coins and jam them in between the loops of the spring before you take it off -- that way you won't have to stretch it to get it back on again. If the springs on your main or side stand are loose and floppy you'll have to fix the stand in the raised position with lock wire or tie wraps.

What a top tip!!! Should work for exhaust springs too, with washers...

Agreed, top tip!

I'm doing this the next time I take the zorsts off, though being Scottish I'm not sure I'd be happy using real money. I'll need to check my foreign coin collection.

Noeli0 · #9 Post by **Noeli0** » Wed Apr 06, 2011 3:26 pm

if it helps there are some smart phone apps that are sound meters, probably only cost a quid if you know someone with a iphone etc, it won't be calibrated but it should give you an idea

D-Rider · #10 Post by **D-Rider** » Wed Apr 06, 2011 5:53 pm

Falcopops wrote:
Kwackerz wrote:as an aside..

Tip; get a bunch of coins and jam them in between the loops of the spring before you take it off -- that way you won't have to stretch it to get it back on again. If the springs on your main or side stand are loose and floppy you'll have to fix the stand in the raised position with lock wire or tie wraps.

What a top tip!!! Should work for exhaust springs too, with washers...
Agreed, top tip!

I'm doing this the next time I take the zorsts off, though being Scottish I'm not sure I'd be happy using real money. I'll need to check my foreign coin collection.

Though a set of these from Aldi makes exhaust spring removal a breeze (the one at the top of the set is most useful)
I think the set cost about a couple of quid

ReggieGasket · #11 Post by **ReggieGasket** » Wed Apr 06, 2011 6:29 pm

Hi, I've got Scorpion race cans on which sounds loud to me. I did Silverstone last year and had no problems. They said they were going to be strict.

Dalemac · #12 Post by **Dalemac** » Wed Apr 06, 2011 6:32 pm

a set of pliers has always worked for me....

szrdave · #13 Post by **szrdave** » Wed Apr 06, 2011 8:45 pm

Take one of those cheap clothes hangers with the plastic 'arms' and metal hook, cut the arms off about 50mm from the hook and you've got the perfect spring puller!

Noeli0 - I just downloaded one of those apps for my HTC, I'll give it a try and see what it comes up with.

What rpm do they test 1L twins at? I guess around 7k?

Aladinsaneuk · #14 Post by **Aladinsaneuk** » Wed Apr 06, 2011 9:01 pm

I hope it's not at 7k.....
Renegades are in full Vulcan bomber mode by then!

Samray · #15 Post by **Samray** » Wed Apr 06, 2011 9:01 pm

From Tims earlier link

...............................1 Cylinder 2 Cylinder 3 Cylinder 4 Cylinder
....... 250cc (4stroke) 5,500rpm 8,500rpm
........400cc (4stroke) 5,000rpm 6,500rpm 7,000rpm 8,000rpm
........600cc (4stroke) 5,000rpm 5,500rpm 6,500rpm 7,000rpm
........750cc (4stroke) 5,000rpm 5,500rpm 6,500rpm 7,000rpm
over 750cc (4stroke) 4,500rpm 5,000rpm 5,000rpm 5,500rpm

125cc 2stroke 7,000rpm
250cc 2stroke 7,000rpm
500cc 2stroke 5,500rpm 7,000rpm 7,000rpm