fish tailing like mad

[yorkie_chris]

Originally Posted by sam hagger

The engine braking can overcome the rear wheel and lock it up though, as editted.

No it cannot. Not in a million years will engine braking LOCK a wheel.
A slide, yes. A lock, no. The difference is pretty marked. Go try it...



Dave is it actually breaking loose? What tyres? How many miles? What pressures?

If it just feels like it's wagging it could be anything on the chassis, swingarm bearings, a collapsing wheel bearing, a faulty tyre etc. Check carefully for any bulges on the sidewall or other obvious fault. It could even be a f##ked shock making it feel like it's moving around (or even a standard shock "working" normally!!)

[yorkie_chris]

Originally Posted by alpinestarhero

no - lower gears are for lower speeds; at 40 mph in 4th, you are running 4000 rpm on an SV-s with standard gearing. Clonk down to third and this goes up to around 4900 - 5000 rpm with increased engine braking...its this increase engine braking that is trying to decelerate the rear wheel....essentially, the rear wheel is trying to drag the bike via the engine braking. The lower the gear and hence the higher the revs, the more engine braking and more snakey snakey fun you get. Or not fun, in this case. Racers use the rear brake heavily for a couple of reasons. One is to stop quicker the other is to settle the bike before going into a turn

the lower gear and the higher RPM's still means the rear wheel is going the same speed

ASH you're a scientific lad, have a think about it.

When braking heavily with the front how much weight is there going to be on the back wheel? How is weight on an interface related to reaction force? How is reaction force related to static friction?

So the collective wisdom of the .org is that something might have gone down on Dave - his rear tyre

[dizzyblonde]

Originally Posted by yorkie_chris

If it just feels like it's wagging it could be anything on the chassis, swingarm bearings, a collapsing wheel bearing, a faulty tyre etc. Check carefully for any bulges on the sidewall or other obvious fault. It could even be a f##ked shock making it feel like it's moving around (or even a standard shock "working" normally!!)

Yeah matts just said that. As for the shock thing, this is why i asked if all the nuts n bolt were nice and tight....remember the odd feeling I had on mine, and there was a bit of a loose one on the bottom of my old shock Its a good job it was due in to see you!

Dave really go over your rear tyre with a fine tooth comb, and check to see if any 'grit and stones' could be really a tiny pinhead of a nail. The roundabout puncture I had, I missed several times, and found a tiny metal pinhead in my tyre. When rob pulled it out it was a giant bloody rivet pin.

Having a puncture itself won't affect your handling.... it's the pressures. Most "punctures" lose a couple of PSI a week..

going on paddock stand for inspection during break in rain

[dizzyblonde]

Originally Posted by Jamiebridges123

Having a puncture itself won't affect your handling.... it's the pressures. Most "punctures" lose a couple of PSI a week..

having a hole in the first place don't help either

To be fair if the hole is enough to let a sizeable amount of air out, IE pressures are running low anyway, a good rider should notice by the end of his/her road. It'd weave and feel very slow to turn in.

Dave I'll ask again have you checked your pressures.....? You don't need it on the paddock stand do to that and it takes all of 30 seconds.

[ophic]

Originally Posted by yorkie_chris

No it cannot. Not in a million years will engine braking LOCK a wheel.

It can if you stall it

[DarrenSV650S]

And it can if you are trying to bump start it. Bloody impossible