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Author Topic: DRZ front tyre  (Read 957 times)

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Offline S - 4 - B

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DRZ front tyre
« on: April 04, 2011, 08:30:46 pm »
Info :
I am 100% new to the DRZ , fitted a new rear tyre , Dunlop D 606 , bike still has original front tyre...bike only has 4600 odd km's on .

The previous owner possibly fiddled with suspension settings , I am not sure.

Took the bike for it's first good ride on Sunday , and the front end just feels completely wrong...as skittish as hell and when cornering on sand the front end keeps wanting to wash out.

There must be a couple of reasons for the way the bike is reacting....can even be my heavy right wrist :mwink:

Am going top reset both back and front suspension to factory settings and start from there.

Anybody in the know:
 Could the front tyre be to blame
 Have you perhaps experienced the same and managed to get it sorted ?

Lastly , please note ....I love this scooter......as I have said before , it is going to get me into serious trouble , BUT , I must also add , I think it is going to help me out of serious trouble as well :peepwall:
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Offline sidetrack

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Re: DRZ front tyre
« Reply #1 on: April 04, 2011, 09:23:05 pm »
Does it only happen on dirt ? If it feels shaky and unstable on tar as well it may be the steering stem bearings. They can be easily checked by putting the bike on a stand and checking for play or roughness in front wheel. Also go back to stock suspension settings and start from there.
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Offline Dux

Re: DRZ front tyre
« Reply #2 on: April 05, 2011, 07:18:38 am »
Info :
I am 100% new to the DRZ , fitted a new rear tyre , Dunlop D 606 , bike still has original front tyre...bike only has 4600 odd km's on


Did the issue only arise since you fitted the rear tyre or was it there before , what front tyre is fitted .
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Offline letsgofishing

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Re: DRZ front tyre
« Reply #3 on: April 05, 2011, 07:21:37 am »
Does it only happen on dirt ? If it feels shaky and unstable on tar as well it may be the steering stem bearings. They can be easily checked by putting the bike on a stand and checking for play or roughness in front wheel. Also go back to stock suspension settings and start from there.

+1
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Offline S - 4 - B

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Re: DRZ front tyre
« Reply #4 on: April 05, 2011, 08:14:29 am »
When I drove the bike home after paying I had to slab it for a bit , and the front was wobbling a bit on the freeway at about 110 and also when you accellerate hard.

The rear knobbly was looking rather sad so I ascibed the behaviour to the square knobbly...had 4600 km's on so I think it had done it's job.

Then fitted the D606 and went for the ride , so I have nothing to compare to.

I checked the steering stem bearings when I serviced the bike, they are fine.

The front tyre is still the OEM one , a Michelin/Bridgestone Grizzly,  ( I am sure tis a Grizzly , not sure of the manufacturer)

The weekend was the first ride.

The previous owner did tell me that he had fiddled with the suspension as he weighs about 110kg's ....I am a 80 kg lightweight.

Will bleed the front and set both back and front back to factory spec and take it from there.

As an aside , I thought the rear was also acting up and gravel roads , then I realised that it was in fact the tyre gaining and then losing traction .... that I think , can safely be written off as bad throttle control  :imaposer:

Thanks for the help guys
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Offline Malibu

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Re: DRZ front tyre
« Reply #5 on: April 05, 2011, 08:28:42 am »
When D got her bike, she had a similar scenario, we set all suspension settings back to factory settings, still had a problem (not as bad), so she threw off the front D606 and put a T63 on and she has been happy as heng since... funny thing was that the front shocks were originally set differently... wonder if the previous owner would have sold if they had figured that one out...? 
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Offline Stevie

Re: DRZ front tyre
« Reply #6 on: April 05, 2011, 09:01:49 am »
This is a really long shot but it caught me when I bought the DR350.
Previous owner had removed the wheel and neglected to replace the spacer on the axle shaft (LHS).
My test ride got interesting at 120km/h!!!!  :eek7: Rode like that for awhile and got concerned when the brakes were starting to squeak and mark the disk. I only isolated the problem when looking at someone elses DR and then checking parts diagrams.

Check, for what it is worth.
 

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Re: DRZ front tyre
« Reply #7 on: April 05, 2011, 09:49:18 am »
Gooi a D606
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Offline Torque Curve

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Re: DRZ front tyre
« Reply #8 on: July 01, 2011, 09:24:27 am »
Howzit S4B,

I suggest the skittish front-end is caused by too hard set-up at rear and or possibly too quick rebound at front. Return front to std and start at rear to solve your problem.
I had my DRZ from new and has spent the last 6000km gettting the suspension working best for my weight. I weigh 75 fully kitted (riding boots, helmet, body armour etc.)
Your tyre is a Bridgestone Gritty, its OME, road legal competition knobbly as required by European enduro rules. My front has 6500km on and still 40% tread left!! Rear went at 5000km. I'm getting Gritty's again for sure! Will even use it on faster, heavier bikes like F800's and AT's.

My set-up.

1. Tyre pressure: 1 bar front, 0.8 rear for off-road. 1.2 front and rear on-road

2. Set rear preload back to factory setting. Don't have manual at hand, but recall 253mm for hard, 256 for medium and 259,5mm for soft. Mine is set to 255mm. If you plan to ride lots of soft sand go for medium to soft setting as this increases the rake angle of the forks when rider is on bike. The range of adjustment on the rear spring I reckon is for riders between 75kg and 100kg. Below or over that range look at custom spring job.
Stock settings on front works perfectly for me. Reason why I spent a year getting it right is because I wanted a suspension set-up that would give fair off-road performance and take my luggage when heading off for a weekend. That meant it had to work well for a 75kg rider and a 100kg rider in theory. So I mostly wasted time in pursuing an unobtainable ideal. I now rather take the trouble to crank up the preload before long trips and leave it set-up for enduro-ish play-stuff the rest of the time.

3. Turn high-speed damping all out. (Big blue nut) This bike is over dampened at rear - this has been discussed at lenght on ADVrider and Thumpertalk.

4. If you fiddle with low-speed damping and rebound settings do so 3-clicks at a time. My damping is left std, but rebound is slowed down by setting rebound 5 clicks in from std. This prevents the bike from kicking me from behind when hitting bumps at speed, but it does not pack up after several bumps following short on each other.
« Last Edit: July 03, 2011, 02:11:12 pm by Torque Curve »
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Re: DRZ front tyre
« Reply #9 on: July 01, 2011, 09:39:55 am »
I found that a TKC on front gives me the best allround performance.

At the back I run a D606.

Suspension : Tune it to standard setting and start tuning from there.
 

Offline N[]vA

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Re: DRZ front tyre
« Reply #10 on: July 01, 2011, 11:36:40 am »
TKC80 is the way forward man (lol at pun)

suspension is an interesting thing to tune hey, what works for one rider maybe totally off for another (of the same weight on the same bike)

All my head shakes have been suspension settings through out my riding history
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Offline MildDog

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Re: DRZ front tyre
« Reply #11 on: July 01, 2011, 12:17:10 pm »
TKC up front, always.

I get some head shake when the tires are really soft (0.8 or less).

But yeah, suspension is the most likely culprit :)
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Re: DRZ front tyre
« Reply #12 on: July 01, 2011, 12:28:18 pm »
TKC up front, always.

I get some head shake when the tires are really soft (0.8 or less).

But yeah, suspension is the most likely culprit :)


When i got my DRZ, it had a terrible headshake from 115 km/h and higher....

I fiddled with the suspension and everything else, but the headshake did not dissapear or
even got better.
Fitted a brandnew back-tyre..................instant solution.
No headshake at all.
 

Offline S - 4 - B

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Re: DRZ front tyre
« Reply #13 on: July 01, 2011, 12:48:42 pm »
Lots of great feedback , thanks guys and girl  :thumleft:

Guess I had better report back , AND own up

I did set everything back to factory spec.

First big problem was that the two front forks had been set  completly OPPOSITE to each other. I should have checked before jumping on and riding.

Second , the back was way too hard for my scrawny behind

After the above the bike was a lot better behaved, but occasionally still shook it's head .

Final piece of the puzzle ????  My friggin oversealous grip :peepwall:

When I realised this and relaxed , the headshake disppareared  :imaposer:

I LOVE MY DRz  :3some:
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Offline Great White

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Re: DRZ front tyre
« Reply #14 on: July 02, 2011, 12:56:50 pm »
Good Job. :thumleft:
 

Offline MildDog

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Re: DRZ front tyre
« Reply #15 on: July 02, 2011, 02:23:21 pm »
When I realised this and relaxed , the headshake disppareared  :imaposer:

I LOVE MY DRz  :3some:

+1 to both.

I had forgotten that. Sometimes I'll ride at high speed only holding the handlebars with my right hand, then there is no headshake at all. Both hands (especially holding on tight) creates quite a headshake. Strange. had the same on my DR650.
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Offline Torque Curve

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Re: DRZ front tyre
« Reply #16 on: July 06, 2011, 02:36:49 pm »
I found that a TKC on front gives me the best allround performance.

At the back I run a D606.

Suspension : Tune it to standard setting and start tuning from there.

I'm curious what sort of mileage you get on a TKC on a DRZ400. The front tyre in this pic has done 6500km, 50/50 on/off, at 1bar pressure always. Rear gave about 4000km usable tread, but loss of centre knob pick-up promted earlier than necessary replacement.
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Offline N[]vA

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Re: DRZ front tyre
« Reply #17 on: July 06, 2011, 02:50:03 pm »
I was doing like 15 - 18k km's on mine 650/690/990, if you run soft pressures they will wear faster
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Offline Torque Curve

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Re: DRZ front tyre
« Reply #18 on: July 06, 2011, 03:05:09 pm »
I was doing like 15 - 18k km's on mine 650/690/990, if you run soft pressures they will wear faster

Yoh! That's serious mileage. I've never managed to get more than 12000km on any bike tyre ever. They've always been ripped to shreads by nails on the road or trail debris long before tread was gone. Lost a brand new set of Bridgestone 020's once on my way from the tyre shop due to an aluminium carpet strip full of nails in the road. As I was between cars I could not avoid it. Ripped 2 large holes in front and 3 in rear tyre.  :'(
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Re: DRZ front tyre
« Reply #19 on: July 06, 2011, 03:28:23 pm »

I'm curious what sort of mileage you get on a TKC on a DRZ400. The front tyre in this pic has done 6500km, 50/50 on/off, at 1bar pressure always. Rear gave about 4000km usable tread, but loss of centre knob pick-up promted earlier than necessary replacement.

I typically get about 4000 - 4500 km on a back tyre.
Dunlop D606

On the front tyre I'm on my first TKC and it has done about 6000 km and
is not even 50% worn.