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carlmalibu
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Joined: 24 Oct 2005
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PostPosted: 00:35 - 06 Mar 2007    Post subject: what will happen if... Reply with quote
I redline my CB500 33bhp restricted and then let out the clutch, like I used to my 125. Would I shoot away from the lights? go at a faster rate than normal? spin the back wheel? pop a wheelie? fall off? all of the above?


please, englighten me?
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 00:37 - 06 Mar 2007    Post subject: Re: what will happen if... Reply with quote
Let it out smoothly - and best to start at a bit lower rpm to get used to it - and you should get decent acceleration.

Dump it from a start and you may flip it.
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carlmalibu
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Joined: 24 Oct 2005
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PostPosted: 00:40 - 06 Mar 2007    Post subject: Reply with quote
its only that I have no confidence with this bike

feels like the back end is slipping, it does if I drop to first with back brake on in the wet (VERY WORRYING!) and I worry about taking corners on it. Also not sure what the power delivery is like

Used to hoon my RS around but that was the only way to get around on it. Been too worried about the CB500, just haven't got used to its power delivery (which is surprising considering the bike)
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cokker
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Joined: 22 Mar 2006
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PostPosted: 00:40 - 06 Mar 2007    Post subject: Reply with quote
If your sitting on it normally, a wheelie.

If you don't shut the throttle off the bike will end up riding you Wink
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Ariel Badger
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Joined: 02 Dec 2006
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PostPosted: 00:55 - 06 Mar 2007    Post subject: Reply with quote
It will fuck your clutch and box if you do it often. If you are not yet confident with the bike why try pratting about with it, you may end up flat on your arse with the bike in a mess.
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 00:58 - 06 Mar 2007    Post subject: Reply with quote
1930 Ariel wrote:
It will fuck your clutch and box if you do it often.

Heard that bikes get more wear where you ride them as well!

It does mean your clutch plates wear quicker, but they are considered 'consumable'. For me, the cost is worth the fun Smile
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Ariel Badger
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PostPosted: 01:13 - 06 Mar 2007    Post subject: Reply with quote
I consider big ends to be consumable, I would rather just not consume them and boxes and arses are expensive.
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Kal
World Chat Champion



Joined: 02 Jan 2007
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PostPosted: 07:02 - 06 Mar 2007    Post subject: Re: what will happen if... Reply with quote
carlmalibu wrote:
I redline my CB500 33bhp restricted and then let out the clutch, like I used to my 125. Would I shoot away from the lights? go at a faster rate than normal? spin the back wheel? pop a wheelie? fall off? all of the above?


please, englighten me?


You'll murder an otherwise beautiful bike - if you hate it that much I will ive it a home.

CB500's are more or less indestructable but I think you are pushig your luck there and it wont ne long before the smell of burnt engine oil fills the air!

Even at 33bhp the CB500 is more than powerful enough to get the front off the ground in first. I can also say that the Bike is very heavy if it comes down on you.

If you try to redline it and dump the clutch I believe you will find yourself bouncing off of the rev limiter and with the revs dying off will probably leave you pulling away from the lights slower than you could do.

I am not exactly slow off of the lights. Launch is at around 3,000 rpm change to second between 4 and 6,000. From second onwards then you can change around the 8k mark which is the powerband on the CB500 I am riding.

carlmalibu wrote:
its only that I have no confidence with this bike

feels like the back end is slipping, it does if I drop to first with back brake on in the wet (VERY WORRYING!) and I worry about taking corners on it. Also not sure what the power delivery is like

Used to hoon my RS around but that was the only way to get around on it. Been too worried about the CB500, just haven't got used to its power delivery (which is surprising considering the bike)
.

CB500.s are pretty linear up to the 8k mark and then they kind of just take off. If you keep your rpm's between 4,000 and 6,000 pms then the power is very tame and useable until you have gotten settled in to how it handles.

If you take care of the CB it will take care of you,and yes they are horrendously under rated as Bikes.
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I Like To Hoon It Hoon It I Like To Hoon It Hoon It I Like To Hoon It Hoon It Ya Like To (HOON IT!).
1984 GB250 Clubman,1983 CB250N Superdream, 1999 GPZ500S
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craigs23
Mr Muscle



Joined: 08 Jun 2005
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PostPosted: 08:01 - 06 Mar 2007    Post subject: Reply with quote
Quote:
its only that I have no confidence with this bike


Hmmm.


Maybe it'll be wise to start somewhere a bit further down than the redline (which wouldn't be great for starts anyway).
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G
The Voice of Reason



Joined: 02 Feb 2002
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PostPosted: 09:42 - 06 Mar 2007    Post subject: Re: what will happen if... Reply with quote
For the record, red line and clutch is generally the method I use to get going from traffic lights and clutch on 33hp bike.


As far as dropping into first in the wet, if it's making it step out then do it at lower rpm and blip the throttle slightly as you do.
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carlmalibu
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Joined: 24 Oct 2005
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PostPosted: 10:15 - 06 Mar 2007    Post subject: Reply with quote
1) what is blipping the throttle?

2)why not ride it to redline in first, kal, for speed off the line?

I wasn't proposing that I was going to do the above I just wanted to know what would happen!
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Speedy3
Traffic Copper



Joined: 13 Aug 2006
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PostPosted: 13:12 - 06 Mar 2007    Post subject: Reply with quote
Blipping the throttle is when you change down gears, you pull the clutch in, give the throttle a "blip" so the engine revs higher, then change down the gear, and it will make the gear change smoother.
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Finglonga
World Chat Champion



Joined: 27 Jul 2004
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PostPosted: 18:10 - 06 Mar 2007    Post subject: Reply with quote
carlmalibu wrote:
its only that I have no confidence with this bike

feels like the back end is slipping, it does if I drop to first with back brake on in the wet (VERY WORRYING!) and I worry about taking corners on it. Also not sure what the power delivery is like


When was the last time you CHECKED YOUR TYRE PRESSURES?
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Kal
World Chat Champion



Joined: 02 Jan 2007
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PostPosted: 00:33 - 07 Mar 2007    Post subject: Reply with quote
If you attempt to bang it into the redline the engine will cut out slightly to protect itself.

This drops your rpms and makes for slower take off. Engine power peaks at around 8k.

A CB500 is a very different bike from an RS125. Its not so high strung, it dosnt need to be thrashed to perform.

A CB500 will happily bury most other road traffic in town just flicking it around at the 4k and 6k marks.

To be honest you never need to be in first once the bike is moving. If I am riding around below 20mph then I'll still have it in second and I'll just feather the clutch to stop her stalling out on me.

I'd say that when you are dropping itn into first you are excessively engine braking - I've done the same. The cure its clutch and change up.

Ideally you'll be wanting as much controllable power as you can have off of the line. The key is smooth, quick gear changes. I practise getting into third before clearing the junction.

I am riding a friends bike so I don't want to abuse it too much.

For the record your tyre pressures should be around 36psi at the front and 40psi at the back.
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Kal...
I Like To Hoon It Hoon It I Like To Hoon It Hoon It I Like To Hoon It Hoon It Ya Like To (HOON IT!).
1984 GB250 Clubman,1983 CB250N Superdream, 1999 GPZ500S
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Zimbo
World Chat Champion



Joined: 09 Jul 2004
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PostPosted: 01:10 - 07 Mar 2007    Post subject: Re: what will happen if... Reply with quote
carlmalibu wrote:
I redline my CB500 33bhp restricted and then let out the clutch, like I used to my 125. Would I shoot away from the lights? go at a faster rate than normal? spin the back wheel? pop a wheelie? fall off? all of the above?


please, englighten me?


Don't know, the only sure way to find out is to try it. Let us know afterwards what happened though, will you? I'm interested.
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Kal
World Chat Champion



Joined: 02 Jan 2007
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PostPosted: 01:22 - 07 Mar 2007    Post subject: Reply with quote
Smile Concvincing someone else to try and wreck his bike with summer on it's way is just cruel...
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Kal...
I Like To Hoon It Hoon It I Like To Hoon It Hoon It I Like To Hoon It Hoon It Ya Like To (HOON IT!).
1984 GB250 Clubman,1983 CB250N Superdream, 1999 GPZ500S
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Zimbo
World Chat Champion



Joined: 09 Jul 2004
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PostPosted: 08:28 - 07 Mar 2007    Post subject: Reply with quote
Not at all, you've got me all wrong, I genuinely have no idea what it'll do!
Besides, CB500s crash really well and don't cost much to repair, he'll be fine Smile
If not, Darwinism rules!
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Arfdog
Crazy Courier



Joined: 17 Aug 2006
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PostPosted: 08:56 - 07 Mar 2007    Post subject: Reply with quote
carlmalibu wrote:
its only that I have no confidence with this bike

feels like the back end is slipping, it does if I drop to first with back brake on in the wet (VERY WORRYING!) and I worry about taking corners on it. Also not sure what the power delivery is like

Used to hoon my RS around but that was the only way to get around on it. Been too worried about the CB500, just haven't got used to its power delivery (which is surprising considering the bike)


2-stroke engines don't provide any effective engine braking, while 4 strokes are very good for engine braking, this is why you are having trouble. Drop a gear and let your clutch out fast at any speed while the engine speed is mismatched, tand there is going to be a quick friction battel between your rear wheel and the ground. If this happens round a corner, in the wet, you'll kiss the tar.

Don't gear down around corners: Going towards corner:slow down, gear down, blip throttle, ease clutch out, then enter bend and accelerate out. You won't slip this way.

Rather than using the brake to brake for corners, use engine braking SMOOTHLY by dropping a gear and EASING the clutch out. Even less chance of skidding, and less brake wear, and by doing so you will automatically be curing your problem of jerky changes, too late in a corner.

I don't take off from a redline on my GS450 from a stop, there really is no point, for a few reasons:

The gearing is so low, that with a bit of an accelerator blip then smooth clutch control and plenty of petrol, you can climb through progressively from lowish revs (2-3K) all the way through to redline within a second or 2. This means 2 things:

1: Your clutch is engaged while you accelerate through to redline, so your clutch does not wear as quickly.

2: your engine is loaded. I don't like to redline in first, because with the low gearing, it would be very similar to redlining in Neutral, which I don't do either. An engine does it hardest high revving work against a load when you are going fast in high gears, and the resultant engine wear biases the engine toward this kind of treatment (if this makes any sense at all). Revving under no load conditions fecks your engine, as there is no load, just pistons flapping about unbiased.

Much the same as your knees when running. Think how fast your legs go at full sprint. This is against a load. Now hang from a branch and try emulate that movement in free air, not good for your knees, is it...

I feel nothing redlining my RXS100 for an hour straight going up to london on the motorway. But, if I redlined it in neutral, I would not make any bets about it lasting more than a minute or three before the engine melts down...
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