180 on an SV

[ophic]

Originally Posted by yorkie_chris

I don't believe you about the lean angle. Surely F = mv^2 / r and the F is a sin of the weight at some angle to the vertical.

I had to think about that statement. Easier to visualise if you imagine an insanely wide tyre - wider than the height of the bike. As you lean, the contact patch could move so far that the bike "falls" in the wrong direction, so you'd turn the wrong way.

You'd have the bike equivalent of a weeble

Originally Posted by fastdruid

I'm once again going to refer back to the book I referred to before

That book is great but keep on mind it breaks down things in to individual aspects. Many of those work against each other when put together in one package as motorcycle. So, even though it is correct real world experience can be different. Simple thing like tire profile can negate your shorter wheelbase turning.

[fastdruid]

Originally Posted by yorkie_chris

But speed of turning is not the be all and end all of handling, everything is a compromise. I bet the SV can put its power down without wheeli-ing more easily for example.

Absolutely, its all a compromise, if the SV had the same wheelbase it would be impossible to keep the front end down.

Which is where one of the advantages of the NC comes in, it has no power, so it doesn't wheelie even with a silly short wheelbase.

*ahem* ok so it needs to be really provoked to wheelie

Was that ohlins fresh out of box or has someone revalved it?

Freshly serviced 3 trackdays ago, dunno about revalving.

There is nothing _wrong_ with the handling of the SV, I've tried a lot of bikes and mine is the second best handling bike I've ever riden, its just that the RVF400 is better.

Druid

[fastdruid]

Originally Posted by zadar

That book is great but keep on mind it breaks down things in to individual aspects. Many of those work against each other when put together in one package as motorcycle. So, even though it is correct real world experience can be different. Simple thing like tire profile can negate your shorter wheelbase turning.

Too true but only to a certain extent, I take it back though, it's not 10cm, it is 8.5cm shorter (1335mm against 1420mm). It is *also* claimed 165kg dry weight, identical to the SV[1].

Now I'd accept that you could get tyre profile to work against it but only if one was on something with a stable profile and the other on something sporty. As it stands both are on road/trackday rubber, BT090's for the NC, D209RR's for the SV. If anything the Dunlops have a more pointy profile. The NC still turns in quicker than anything else I have ever ridden.

Druid

[1] and my SV is *much* lighter than stock.

Originally Posted by fastdruid

The NC still turns in quicker than anything else I have ever ridden.

It is different bike
Wheelbase alone may not be reason, it is ratio between wheelbase and cog, and than you have trail and rake, swingarm, tires, weight distribution and even rotating parts inside motor.

[fastdruid]

Originally Posted by zadar

It is different bike
Wheelbase alone may not be reason, it is ratio between wheelbase and cog, and than you have trail and rake, swingarm, tires, weight distribution and even rotating parts inside motor.

Too true and it *is* a combination of everything, but the biggest single difference is still the wheelbase.

NC35 dry weight 165Kg
SV650S dry weight 165Kg

NC35 25° Rake, 92mm Trail
SV650 25° Rake, 100mm Trail

NC35 150/60R17
SV650 160/60R17

NC35 swingarm length 540mm
SV650 swingarm length ???

NC35 wheelbase 1335
SV650 wheelbase 1420

Druid

That is huge difference in trail, even my race sv does not have that low trail number with rear up 3/4" at shock and front down 1".

Originally Posted by fastdruid

SV650 swingarm length ???
Druid

SV650 swing arm s 545 mm to the middle of the adjuster...

535 mm is the shortest it can be with axle all the way forward...

Luis

[fastdruid]

So nearly same length swingarm then.

Druid

Can someone tell me something. I have a standard k8 sv 650. I need to change my tyres. At te rear it has the 160 70 17 and i want to put a 180 55 17 because i can the buy a combo for like r1700 where if i buy a cr2 size 170 70 17 i will pay 1449 for the rear and r1049 for the front. Anyone done this cause the bike shop says it will affect cornering etc. I use the bike for driving to work and back. thats about it. Thanx in advance