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Roger Clifford
Nottingham,
United Kingdom
Posts: 4
Daytona T595 (97-98)
12 Oct 2008 19:59 |
Hi,
I'm new to the forum and hope someone can help. I own a sprint ST and have just bought a T595. At 30-40mph the T595 starts to weave. I have also noticed that it seems to drop suddenly into very low speed corners which then require a definate counter-steer to correct. The tyres are new pirelli diablo with 36psiF and 42psi rear, the head bearings feel smooth. At 50mph plus there is no weaving and she feels rock solid at 70.....more so than my ST.....Can anyone make suggestions?
Thanks
Rog
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bradtx
Pearland, TX,
USA
Posts: 830
Premier Member
Daytona 955i (04->)
12 Oct 2008 20:40 |
Roger, I've the same tires on the '04 and run 33F and 36R.
For the weaving problem, take a look at the dampening adjustments. When I first got the '04 it did the same thing, primarily with a quartering crosswind. Rear rebound was very mal adjusted. Set both ends to 'normal' and problem solved.
Brad
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Roger Clifford
Nottingham,
United Kingdom
Posts: 4
Daytona T595 (97-98)
12 Oct 2008 21:12 |
Thanks Brad,
I set the pressures to be the same as my ST which runs on Bridgestones and seems very happy at 36F and 42R. My first thought on the turn in was to drop the pressures....particularly as the Daytona is much lighter than the ST. Cn you tell me what the "normal" suspension settings are?
Regards
Rog
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Red Monkey
Swinging in a tyre,
United Kingdom
Posts: 18,987
Premier Member
Daytona 955i (99-01)
12 Oct 2008 22:50 |
All Daytona's drop into slow corners. There are 2 solutions.
First, just check that no one has drilled the dog-bones to raise the rear ride-height : too much will accentuate the problem.
The second solution is simple and was taught to me as the technique used by California Superbike School. Do all of your braking in a straight line and then gently apply throttle from the minute you turn-in. This stops the front from loading and helps immensely with the sensation that the bike is about to tuck.
As for the weave, the obvious things are head bearings, tyres (profile and pressures) and suspension adjustment although I suspect the first 2 more than the last at the speeds you describe.
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Guy G
Southport,
United Kingdom
Posts: 75
Premier Member
Speed Triple 955i (99-01)
12 Oct 2008 23:22 |
Hi Roger it sounds like your head bearings are to tight . It gives the same effect as having a flat front tyre . A mechanic tweaked mine up once with out asking me first thats how I know . If you can get holed of a Vauxhall fan spanner (I think thier 36mm) they are very flat & slid in between the top yoke & the head stock where the adjustment bolt lives that way you dont have to mess with the multi holed bolt on the top yoke as the tool to remove it is expensive
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bradtx
Pearland, TX,
USA
Posts: 830
Premier Member
Daytona 955i (04->)
13 Oct 2008 00:34 |
Roger, Here are the settings and locations:
Fork Rebound; 1 turn from full CW located atop the spring preload adjuster.
Fork Compression; 1 turn from full CW located just above the front axle at the rear of the fork.
Shock Rebound; 1.5 turn from CW located on lower end of shock on the RHS.
Shock Compression; 1.5 turn from CW located on the RHS of the shock reservoir.
My '04 did the push-pull thing when it had BT010 tires, but that stopped with the Pirellis. My '98 still has BT010s and it's still a push-pull turner.
Brad
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trevski
canterbury,
New Zealand
Posts: 664
Speed Triple T509 (97-98)
13 Oct 2008 07:36 |
roger, i had dunlop race profile 207's (triangular profile) on mine once and the handling was as you describe but came good at 50+mph. fitting pirelli's (rounded profile) transformed the bike. running conti road attack now, and they also very good.
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Roger Clifford
Nottingham,
United Kingdom
Posts: 4
Daytona T595 (97-98)
13 Oct 2008 22:02 |
Thanks everyone for your suggestions and help. I have checked some things out this evening ......Firstly there was virtually no preload on the front.....Sag was about 50mm!! I have tightened the preload adjusters so there are 4 lines showing which is giving me 30-35mm. Front screw adjusters were 2 turns out....corrected to 1 turn.............Rear were 1/2 turn out..........now corrected to 1.5 turns out. I have not had chance to road test yet, but the rear suspension now goes down when i sit and the front doesnt dive, so i'm quite hopeful that this and the tyre pressure drop will sort it.............
Thanks again and i'll update you when I get to road test
Regards
Roger
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Martin R
09 S3 1050,
Finland
Posts: 467
Speed Triple (05->)
14 Oct 2008 11:07 |
Steering head bearing is loose. Very common issue on a Triumph.
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Fret.
South.,
United Kingdom
Posts: 38,534
Premier Member
Tiger 1050 (07->)
14 Oct 2008 21:55 |
Don't drop the tyre pressures, they may overheat or not work correctly.
Manufacturers set their pressures at the best optimum all round performance and 36F 42R works on about 95% of all known bikes.
Of course, it could actually be the fact that it now has new tyres that have exaggerated the problem that was ridden around before.
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Guy G
Southport,
United Kingdom
Posts: 75
Premier Member
Speed Triple 955i (99-01)
14 Oct 2008 23:43 |
Roger ,seriously check your head bearings . I had exactly the same problem after a mot station tightened them up to much . The bike started to weave at slow speeds but was ok at speed .It also felt smooth when turning the bars at a stand still . I just slackened it off about 1/4 turn & all went back to norm . Any Garage should have a spanner that will fit in between the top yoke & the head stock ,as I say the spanner made to adjust Vauxhall fans fits perfectly . Its a very flat 36mm & it takes seconds to do & you can always adjust it back if it doesnt work
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Roger Clifford
Nottingham,
United Kingdom
Posts: 4
Daytona T595 (97-98)
16 Oct 2008 19:04 |
Hi again.......
Took the bike out for a quick spin to check on my handy work.......I put the pressures back to 36/42. Now I can feel its the headbearings!!! they are too tight....It just holds any position I steer into, thats why I was having to counter-steer........it feels so obvious now. I will be buying a spanner tomorrow to loosen it off a bit. Thanks for all your help everyone.
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Pete Barnett
Evesham,
United Kingdom
Posts: 116
Daytona 955i (99-01)
16 Oct 2008 22:24 |
If that doesn't cure the problem, it wold be worth having a look at the bearings. Over tightening them may have caused some permanent damage.
Good luck.
By the by, I use Dunlop D208's and 36/42 feels terrible, I'd never suggest you run any less, but I do and the handling and grip levels suits me much better.
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