If I had 4mm of rear friction zone, I think I would make sure the shock linkage and swing arm pivot point are lubed well. The bike is a year old,---and the factories are notorious for not putting much, (if any) grease on those spots. Just for a reference, my YZ250 2-stroke has 2mm of rear friction zone. it was really easy to measure accurately with the Motool slacker too. :)
4:36 I think you have that backwards. Too little "free sag" (I prefer "bike sag" and "rider sag" terms), then the spring is too soft. But you had it right just before 4:36. I think using the word "pre-load" made it a bit confusing at the moment. Not enough "bike sag" (under 15 mm), means the spring is too soft, and you needed a lot of pre-load to get the right rider sag correct. Paul Thede's motorcycle suspension bible, is a great book. Man,in my racing days of MX, I would have crashed less if I knew the front end "rake and trail" that I much later learned from that great book.
Try the Motool "slacker", for a one man job setting sag. Digital read out on the bar, in real time even if you shift your weight. Nothing works better IMO. You just have to balance yourself against a wall or something, but that is pretty easy. Just barely touch the wall so you know all your weight is on the bike.
Using weight on the bike, is probably not the same as your body distribution. I could expect a 2 or 3 mm error. You can check that with the Motool slacker also. :)
I’m 63 kg and love plushy front end even though I use mostly on tarmac. What spring rate should I use - 0.40 or 0.42 could you please recommend. Thank you 🙏
Free sag - the amount the bike sits under its own weight. A high free sag indicates a spring which is too stiff for you. Meaning you don’t have enough preload tightened down on the rear spring so initial travel is too soft. In your vid you say that your high free sag indicates stiffer springs which is incorrect. The stock rear spring is really soft stock, in your case I wouldn’t go higher.
I meant my free sag number was high, which is a low directional free sag (although now i can see the confusion of what is high, the number or the direction, lol). My free say was 48mm and recommended was under 40mm.
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Great presentation! beeing new to this kind of bike, my front suspension is way to stiff, finally some clear explanations on why and how to! thanks!
If I had 4mm of rear friction zone, I think I would make sure the shock linkage and swing arm pivot point are lubed well. The bike is a year old,---and the factories are notorious for not putting much, (if any) grease on those spots. Just for a reference, my YZ250 2-stroke has 2mm of rear friction zone. it was really easy to measure accurately with the Motool slacker too. :)
Thanks. Looking forward to following along on my bike.
4:36 I think you have that backwards. Too little "free sag" (I prefer "bike sag" and "rider sag" terms), then the spring is too soft. But you had it right just before 4:36. I think using the word "pre-load" made it a bit confusing at the moment. Not enough "bike sag" (under 15 mm), means the spring is too soft, and you needed a lot of pre-load to get the right rider sag correct. Paul Thede's motorcycle suspension bible, is a great book. Man,in my racing days of MX, I would have crashed less if I knew the front end "rake and trail" that I much later learned from that great book.
Try the Motool "slacker", for a one man job setting sag. Digital read out on the bar, in real time even if you shift your weight. Nothing works better IMO. You just have to balance yourself against a wall or something, but that is pretty easy. Just barely touch the wall so you know all your weight is on the bike.
Using weight on the bike, is probably not the same as your body distribution. I could expect a 2 or 3 mm error. You can check that with the Motool slacker also. :)
Sag measurement is the same for the front and the back then?
Hi like your Content
Keep up the good work I enjoy following you cheers
Thanks for watching!
Im planning on buying a 2019 crf450L, but Im 320lbs... am I to big for the bike???
I’m 63 kg and love plushy front end even though I use mostly on tarmac. What spring rate should I use - 0.40 or 0.42 could you please recommend. Thank you 🙏
Since you weight a little less than me, so yeah I think 0.4-0.42 would do nicely.
@@lexdfoxthanks for your input, appreciated. I ordered 0.40 let’s see how it improves 👍
I felt my crf 450rl front forks so hard. How could i do sir? Because I am first rider
Free sag - the amount the bike sits under its own weight. A high free sag indicates a spring which is too stiff for you. Meaning you don’t have enough preload tightened down on the rear spring so initial travel is too soft. In your vid you say that your high free sag indicates stiffer springs which is incorrect.
The stock rear spring is really soft stock, in your case I wouldn’t go higher.
I meant my free sag number was high, which is a low directional free sag (although now i can see the confusion of what is high, the number or the direction, lol). My free say was 48mm and recommended was under 40mm.
@@lexdfox That part was confusing - I rewound it a couple of times to try to understand what you meant.
Love the CRF content, keep up the great vids.
Im planning on buying a 2019 crf450L, but Im 320lbs... am I to big for the bike???
According to the owners manual, yes, should be fine though