Am I going paranoid - SV650.org

20-07-06, 06:16 AM

I've had the bike step out at the back on me twice on consecutive days. Both times on LH bends first time at low speed second time at normal out of town speed.

I've checked the tyre and can't see anything obvious

Not cold tyres as on both instances I'd ridden approx 15 miles befor the incident

So the question is can the rear tyre be more grippy on one side than the other?

Any thoughts would be appreciated as I keep waiting for it to happen now and it's taking the edge off the ride

Cheers

20-07-06, 06:23 AM

Quite possibly it is the sealing edging that they use on road repairs (sorry, forget what it's called properly). They are by design softer and less grippy than normal tarmac and with the heat we have been having lately, even less so.

Other thing that I can think of is tyre pressure, even 3 psi can make a difference in how the bike handles round corners. Well it does for me anyway.

TSM · 20-07-06, 07:57 AM

Quote:

Originally Posted by BigApe

Quite possibly it is the sealing edging that they use on road repairs (sorry, forget what it's called properly). They are by design softer and less grippy than normal tarmac and with the heat we have been having lately, even less so.

Other thing that I can think of is tyre pressure, even 3 psi can make a difference in how the bike handles round corners. Well it does for me anyway.

'Banding' i think its called.

20-07-06, 08:20 AM

Have you checked your wheel alignment?

Sir Trev · 20-07-06, 11:29 AM

How old are your tyres? Does your bike sit with one side facing the sun a lot which will make the tyres go off quicker?

Just a few thoughts...

20-07-06, 11:55 AM

Quote:

Originally Posted by BigApe

Other thing that I can think of is tyre pressure, even 3 psi can make a difference in how the bike handles round corners. Well it does for me anyway.

I thought about tyre pressures they were on the button when I checked before riding, but it was F*$%ing hot so I wondered if they could still be wrong. I'll check early one morning perhaps

Quote:

Originally Posted by skidmarx

Have you checked your wheel alignment?

I don't think its alignment, because if nothing else it passed its MOT 3 days before and that's one of the things they check. Isn't it?

Quote:

Originally Posted by Sir Trev

How old are your tyres? Does your bike sit with one side facing the sun a lot which will make the tyres go off quicker?

Tyres 12-18 monts old & Bike lives in a garage so sun shouldn't be an issue

Didn't see any banding on either occassion, but that may just be poor observation

Cheers though for your thoughts

I did wonder if I had managed to lub the tyre (Wurth dry wax stuff) as well as the chain the other day

If I did how do I get it off, or just keep chancing it utill I wear it aware

northwind · 20-07-06, 12:00 PM

Are they 020s?

20-07-06, 12:04 PM

Nope, Metzler Z4s

johnnyrod · 20-07-06, 01:35 PM

I was going to suggest you'd lubed the tyre, or it had flung off the chain - does the rim look dirty (fnarrrr). Rubber doesn't stand up to a lot so best to scrape it off and the last bit will go in the end.

Easy way to check rear wheel alignment is while riding. medium speed, shut the throttle and take your hands off the bars, it should go in a straight line. If it wanders (consistently) left then the left adjuster is tightened more than the right, i.e. the wheel is pointing leftwards. If so, try about half a turn or so of differene between the adjusters and try it again next time you're out. The other symptom, which is less noticeable on bikes these days with quicker steering, is that it'll flop into left-handers but not right-handers if the rear wheel is pointing right (I think, might have it back to front, it's been a while). You don't notice the extra effort required to turn the other way, but you do notice when it is too easy - so only one side feels wrong.

Or it could be the heat, the tarmac will be very hot in this weather.
HTH

20-07-06, 01:57 PM

LUBE LUBE LUBE always the lube. I have done this a couple of times.. Last time I nearly ended up in my neihbours lexus.

Trick I was told from a friend that races is.. Pop the lube on at the end of a trip and then because you leave it a long time it will not fling off. Also makes more stick to the chain so you can get away with putting less on. I always check the back tyre when I roll it out of the hut now just to make sure.

It is easy to do. I was looking at getting a scootoiler too as they are better for the chain apparently.

20-07-06, 06:16 AM	#1
Tris Guest Posts: n/a	Am I going paranoid I've had the bike step out at the back on me twice on consecutive days. Both times on LH bends first time at low speed second time at normal out of town speed. I've checked the tyre and can't see anything obvious Not cold tyres as on both instances I'd ridden approx 15 miles befor the incident So the question is can the rear tyre be more grippy on one side than the other? Any thoughts would be appreciated as I keep waiting for it to happen now and it's taking the edge off the ride Cheers

20-07-06, 11:29 AM	#5
Sir Trev Member Mega Poster Join Date: Jun 2005 Location: High Wycombe, where the chair factories used to be Posts: 1,479	How old are your tyres? Does your bike sit with one side facing the sun a lot which will make the tyres go off quicker? Just a few thoughts... __________________ We are the Goon Squad and we're coming to town, BEEP BEEP!

20-07-06, 12:00 PM	#7
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,083	Are they 020s? __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

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20-07-06, 06:23 AM	#2
Stig Guest Posts: n/a	Quite possibly it is the sealing edging that they use on road repairs (sorry, forget what it's called properly). They are by design softer and less grippy than normal tarmac and with the heat we have been having lately, even less so. Other thing that I can think of is tyre pressure, even 3 psi can make a difference in how the bike handles round corners. Well it does for me anyway.

20-07-06, 08:20 AM	#4
skidmarx Guest Posts: n/a	Have you checked your wheel alignment?

20-07-06, 12:04 PM	#8
Tris Guest Posts: n/a	Nope, Metzler Z4s

20-07-06, 01:35 PM	#9
johnnyrod Member Mega Poster Join Date: Jul 2003 Location: Doncaster, oop norf Posts: 2,128	I was going to suggest you'd lubed the tyre, or it had flung off the chain - does the rim look dirty (fnarrrr). Rubber doesn't stand up to a lot so best to scrape it off and the last bit will go in the end. Easy way to check rear wheel alignment is while riding. medium speed, shut the throttle and take your hands off the bars, it should go in a straight line. If it wanders (consistently) left then the left adjuster is tightened more than the right, i.e. the wheel is pointing leftwards. If so, try about half a turn or so of differene between the adjusters and try it again next time you're out. The other symptom, which is less noticeable on bikes these days with quicker steering, is that it'll flop into left-handers but not right-handers if the rear wheel is pointing right (I think, might have it back to front, it's been a while). You don't notice the extra effort required to turn the other way, but you do notice when it is too easy - so only one side feels wrong. Or it could be the heat, the tarmac will be very hot in this weather. HTH

20-07-06, 01:57 PM	#10
fullstop102 Guest Posts: n/a	LUBE LUBE LUBE always the lube. I have done this a couple of times.. Last time I nearly ended up in my neihbours lexus. Trick I was told from a friend that races is.. Pop the lube on at the end of a trip and then because you leave it a long time it will not fling off. Also makes more stick to the chain so you can get away with putting less on. I always check the back tyre when I roll it out of the hut now just to make sure. It is easy to do. I was looking at getting a scootoiler too as they are better for the chain apparently.