@eugenbizzz fork oil that old will be very thick, and if the forks are cold, the rebound will be very slow as you state. If you ride the bike after 50 miles or so, the forks will pogo as the oil breaks up and gets thinner due to friction producing heat. We recommend fork oil changes every 5,000 miles ideally, and 10,000 miles is a worst case scenario. OTT offers an e-download to show you how to change fork oil for a few $'s.
@eugenbizzz with fork oil that old and if the ambient temps are cold, there's no surprise that the forks won't return as the fork oil is essentially glue. Fork action will improve after 50 miles or so once the oil gets hot. Change the fork oil and fork rebound action will return - we have a download for that task via onthethrottles web site!
@Sarksoul123456 Phillip. 1.5 to 2 inches for the front and 1.25 to 1.5 inches for the rear for standard 4.5 to 5 inches of travel. Increase the inch measurements for longer travel suspension.
Can I put the bike up on rear and front stands and set the sag that way? I don't have a wheel chalk to hold it straight up. I have Pit Bull rear and front (the one that holds the bike up via the fork legs) stands.
Can I put the bike up on rear and front stands and set the sag that way? I don't have a wheel chalk to hold it straight up. I have Pit Bull rear and front (the one that holds the bike up via the fork legs) stands.
@AgentBetlog if you can, get some friends over to help. You can put the bike on the side stand and measure the extended sag that way by lifting one wheel at a time off the ground. Once you have those measurements you can have someone hold the bike and a 3rd person measure. That's the only way to get it right. You can use the stands but you will still need a second person to measure correctly.
@SportbikeWrench, thanks Dave. Ok so to be clear, setting the bike's suspension when up on both front and rear stands will be the same as it is when setting it using a chalk? Like you said however, I will still need an extra person with this. So the plan is for me to set up the bike on the stands, measure the extended sag, sit on the bike with full gear and in full tuck, then have a friend measure the sag on rear and front, adjust/re-adjust, then repeat.
@AgentBetlog not quite. Use the kick stand to elevate the front and rear wheel to measure extended length. Put the bike up on stands and then sit on it and measure compressed length.
Hi Dave , great shows !! i think i suffer from a geometry tear on the front of my 2004 gsxr750, i see a tear following the circumference of the tyre of about 5-10mm.
i have the preload all the way in and only 1.5 turns out from full in on compression so i thought things were pretty hard up front .
I have dialled in a little preload into the rear so i guess its sitting over the front ?? whats the best way to equal this out ? Thanks a million ....KFOR
@kfor750 As long as the tire pressure is correct, it sounds like this could be a geometry tear. Set fork compression at 1/2 a turn out and set shock compression at 2 turns out. You could also change the forks position in the triples to take weight off the front tire. The forks had soft springs in them, so this is not unusual.
@SportbikeWrench ...Dave thanks again i reset sag and took off 2.5 turns out on the preload (being it the gross adjustment) and half out on the compression. Seems to have cleaned up the tyre !! As a thank you i have bought your double set dvd and wow im so glad i did your clear straight forward approach in explaining set up really works.....anyone reading this you obviously are interested in suspension set up, if you havent yet , may i suggest you get Dave's DVD's ..All the Best Dave ....KFOR :)
@kfor750 Glad that all worked out for you and saved the tyre while giving you an understanding of why that happened. Thanks for purchasing the DVD's - no doubt they will be very helpful to you!
Spring tension will stay much the same irrespective of hot or cold unless the spring is "tired" and is losing its stable rate of travel.
Oil must indeed be hot to set rebound correctly front and rear to get the bike balanced.
Compression should be tested when oil is hot, all for braking and corner entrance optimization by running through different settings to get the feel you are looking for.
Comment removed
pengasus 7 months ago
mi front forks with ribound all open(no ribound) don"t pogo , its turning back slow! ( fork oil 10.000 miles street)
eugenbizzz 1 year ago
@eugenbizzz fork oil that old will be very thick, and if the forks are cold, the rebound will be very slow as you state. If you ride the bike after 50 miles or so, the forks will pogo as the oil breaks up and gets thinner due to friction producing heat. We recommend fork oil changes every 5,000 miles ideally, and 10,000 miles is a worst case scenario. OTT offers an e-download to show you how to change fork oil for a few $'s.
Dave Moss
Host
SportbikeWrench 1 year ago
@eugenbizzz with fork oil that old and if the ambient temps are cold, there's no surprise that the forks won't return as the fork oil is essentially glue. Fork action will improve after 50 miles or so once the oil gets hot. Change the fork oil and fork rebound action will return - we have a download for that task via onthethrottles web site!
Dave Moss
Host
CatalystReactionSBW 9 months ago
dave moss u are a mith !! u helpt me o lot ! thanks from italy
eugenbizzz 1 year ago
nice how to setting sag but if you could to write the inches to mm I appreciated!!
Phillip from Greece!!
thanks for all the videos you done for our bikes!
Sarksoul123456 1 year ago
@Sarksoul123456 Phillip. 1.5 to 2 inches for the front and 1.25 to 1.5 inches for the rear for standard 4.5 to 5 inches of travel. Increase the inch measurements for longer travel suspension.
Dave Moss
Host
SportbikeWrench 1 year ago
@SportbikeWrench YOu are the best!!thank you very much for your reply!!!
Sarksoul123456 1 year ago
Can I put the bike up on rear and front stands and set the sag that way? I don't have a wheel chalk to hold it straight up. I have Pit Bull rear and front (the one that holds the bike up via the fork legs) stands.
AgentBetlog 1 year ago
Can I put the bike up on rear and front stands and set the sag that way? I don't have a wheel chalk to hold it straight up. I have Pit Bull rear and front (the one that holds the bike up via the fork legs) stands.
AgentBetlog 1 year ago
@AgentBetlog if you can, get some friends over to help. You can put the bike on the side stand and measure the extended sag that way by lifting one wheel at a time off the ground. Once you have those measurements you can have someone hold the bike and a 3rd person measure. That's the only way to get it right. You can use the stands but you will still need a second person to measure correctly.
Dave Moss
Host
SportbikeWrench 1 year ago
@SportbikeWrench, thanks Dave. Ok so to be clear, setting the bike's suspension when up on both front and rear stands will be the same as it is when setting it using a chalk? Like you said however, I will still need an extra person with this. So the plan is for me to set up the bike on the stands, measure the extended sag, sit on the bike with full gear and in full tuck, then have a friend measure the sag on rear and front, adjust/re-adjust, then repeat.
AgentBetlog 1 year ago
@AgentBetlog not quite. Use the kick stand to elevate the front and rear wheel to measure extended length. Put the bike up on stands and then sit on it and measure compressed length.
Dave
SportbikeWrench 1 year ago
Hi Dave , great shows !! i think i suffer from a geometry tear on the front of my 2004 gsxr750, i see a tear following the circumference of the tyre of about 5-10mm.
i have the preload all the way in and only 1.5 turns out from full in on compression so i thought things were pretty hard up front .
I have dialled in a little preload into the rear so i guess its sitting over the front ?? whats the best way to equal this out ? Thanks a million ....KFOR
kfor750 1 year ago
@kfor750 As long as the tire pressure is correct, it sounds like this could be a geometry tear. Set fork compression at 1/2 a turn out and set shock compression at 2 turns out. You could also change the forks position in the triples to take weight off the front tire. The forks had soft springs in them, so this is not unusual.
Dave Moss
Host
SportbikeWrench 1 year ago
@SportbikeWrench ...Dave thanks again i reset sag and took off 2.5 turns out on the preload (being it the gross adjustment) and half out on the compression. Seems to have cleaned up the tyre !! As a thank you i have bought your double set dvd and wow im so glad i did your clear straight forward approach in explaining set up really works.....anyone reading this you obviously are interested in suspension set up, if you havent yet , may i suggest you get Dave's DVD's ..All the Best Dave ....KFOR :)
kfor750 1 year ago
@kfor750 Glad that all worked out for you and saved the tyre while giving you an understanding of why that happened. Thanks for purchasing the DVD's - no doubt they will be very helpful to you!
Dave Moss
Host
SportbikeWrench 1 year ago
it doesnt matter if the bike is cold when setting sag correct?... i know u want it hot when adjusting hydraulics tho but not spring tension?
TreeK7 2 years ago
Spring tension will stay much the same irrespective of hot or cold unless the spring is "tired" and is losing its stable rate of travel.
Oil must indeed be hot to set rebound correctly front and rear to get the bike balanced.
Compression should be tested when oil is hot, all for braking and corner entrance optimization by running through different settings to get the feel you are looking for.
Dave Moss
Host
SportbikeWrench 2 years ago
Can you help me set up my suspension? I sent a video response to show you what its doing.
123djb 2 years ago