just fork oil - SV650.org

13-08-07, 08:58 PM

could i just change the fork oil to 15w on my 99 naked instead of doing the springs as well? i weigh prob 13.5 stone if this make a difference. its not too bad on my own but with my 8 stone mrs on the back on the cat n fiddle it got a wee bit scary

thanks

Sid Squid · 13-08-07, 10:24 PM

It can certainly be done, but the front suspension will still be softly sprung but now damped more heavily, the springing and damping are the two important factors of your suspension that need to be suitably balanced.

fizzwheel · 14-08-07, 07:28 AM

you could, but whilst you've got it apart to change the oil its not much more work to do the springs at the same time. You IMHO might as well do both whilst you've got it apart.

johnnyrod · 15-08-07, 11:42 AM

The damping's rubbish but not nearly so rubbish as the springs. I changed the springs last out of forks mods, and it made a big difference. I weigh nowt as well. Worth getting the preload adjuster tops too. If you take apillion ofetn I'd suggest the progressive rather than linear springs.

embee · 15-08-07, 01:22 PM

Just to confirm what the others said.

I went the cheapo route and put in thicker oil, which does help a little, but eventually decided to splash out on some springs and it's chalk and cheese. At 13stone plus, and with a pillion to boot, you really do need more spring in there.

I was going to fit 0.8kg/mm springs, from the various calculators available and my weight ( http://www.racetech.com/ ), but the place I went to only had 0.85 in stock, so I went with that ( http://www.k-tech.uk.com/ ). They're not too hard for me (12st), and would probably suit your needs fine. The stock springs are 0.706 IIRC.

It'll be the best £70 you spend on it!

13-08-07, 08:58 PM	#1
leemole Guest Posts: n/a	just fork oil could i just change the fork oil to 15w on my 99 naked instead of doing the springs as well? i weigh prob 13.5 stone if this make a difference. its not too bad on my own but with my 8 stone mrs on the back on the cat n fiddle it got a wee bit scary thanks

13-08-07, 10:24 PM	#2
Sid Squid No, I don't lend tools. Mega Poster Join Date: Jul 2003 Location: Skunk Works, Nth London Posts: 8,680	Re: just fork oil It can certainly be done, but the front suspension will still be softly sprung but now damped more heavily, the springing and damping are the two important factors of your suspension that need to be suitably balanced. __________________ If an SV650 has a flat tyre in the forest and no-one is there to blow it up, how long will it be 'til someone posts that the reg/rec is duff and the world will end unless a CBR unit is fitted? A little bit of knowledge = a dangerous thing. "a deathless anthem of nuclear-strength romantic angst"

14-08-07, 07:28 AM	#3
fizzwheel Super Moderator Mega Poster Join Date: Dec 2003 Location: Somerset Posts: 3,614	Re: just fork oil you could, but whilst you've got it apart to change the oil its not much more work to do the springs at the same time. You IMHO might as well do both whilst you've got it apart. __________________ Look Dave, I can see you're really upset about this. I honestly think you ought to sit down calmly, take a stress pill, and think things over. K5 GSXR 750 Anniversary Edition

15-08-07, 11:42 AM	#4
johnnyrod Member Mega Poster Join Date: Jul 2003 Location: Doncaster, oop norf Posts: 2,128	Re: just fork oil The damping's rubbish but not nearly so rubbish as the springs. I changed the springs last out of forks mods, and it made a big difference. I weigh nowt as well. Worth getting the preload adjuster tops too. If you take apillion ofetn I'd suggest the progressive rather than linear springs.

15-08-07, 01:22 PM	#5
embee Member Mega Poster Join Date: Jul 2003 Location: Warwickshire Posts: 2,802	Re: just fork oil Just to confirm what the others said. I went the cheapo route and put in thicker oil, which does help a little, but eventually decided to splash out on some springs and it's chalk and cheese. At 13stone plus, and with a pillion to boot, you really do need more spring in there. I was going to fit 0.8kg/mm springs, from the various calculators available and my weight ( http://www.racetech.com/ ), but the place I went to only had 0.85 in stock, so I went with that ( http://www.k-tech.uk.com/ ). They're not too hard for me (12st), and would probably suit your needs fine. The stock springs are 0.706 IIRC. It'll be the best £70 you spend on it! __________________ "Artificial Intelligence is no match for natural stupidity"

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