Thanks for the advice Dave.
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| Question about fork clunk http://www.kawi2strokes.com/forum/viewtopic.php?f=14&t=12658 |
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| Author: | GUTS [ Wed Apr 05, 2017 5:29 pm ] |
| Post subject: | Question about fork clunk |
When I ride my S2 around if I hit big enough bumps to top out the forks the have a solid clunk when they get there. When I was test riding the S1C yesterday the forks act the same way. Do all the S1's and S2's do this or do I need to fix something? When I filled the fork oil I used actual fork oil and put just over 7oz in each leg. Maybe I should use heavier oil? |
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| Author: | Ja-Moo [ Wed Apr 05, 2017 6:37 pm ] |
| Post subject: | Re: Question about fork clunk |
They all clunk |
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| Author: | H2RTuner [ Wed Apr 05, 2017 7:33 pm ] |
| Post subject: | Re: Question about fork clunk |
I am old skool, but it seems to work. I use a straight viscosity engine oil on the forks, and, I only put in enough to cover the top of the spring stand by about an inch. I will put in say, your 7 oz, then, gently pump the forks to get the oil down into the tube, and then, finish the level off to go above the fork seat. What happens is that as the forks are being worked while riding, the fork oil is actually pumped out of the dampers, up onto the springs, and, if the amount of fork oil is too low, the damper goes dry at its top area. I also built a fork oil level filler, syringe, plastic clear tube, length of steel tubing, with a stop. This way, I can set the stop to the level I want, and install the oil, then, suction it off to get it to the height I want, both sides the same. This way, not much clunking at all. Lots of work, but, I like making tools and specialty items, keeps me active. |
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| Author: | GUTS [ Wed Apr 05, 2017 7:58 pm ] |
| Post subject: | Re: Question about fork clunk |
Thanks for the advice Dave.
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| Author: | H2RTuner [ Thu Apr 06, 2017 1:03 am ] |
| Post subject: | Re: Question about fork clunk |
I think at this point, I'd get the bike up on its center stand, front wheel off the ground, and pull the springs out of the tubes. Use a flashlight to see if the damper tops are under oil, or if the oil level is lower than them. Fill as needed to go over the top of the spring seats on the damper tops, buy an inch or so, not much more. And, I'd use a straight 20W motor oil, but, then, that is just me, and has worked for over 4 decades. I would also think you have the rebound springs in the dampers as well, the small ones that cushion the front end when it reaches the fully extended position??? |
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