Cjanssen83 Posted May 21, 2023 Share Posted May 21, 2023 (edited) Which point do I measure from? Red, green, or blue? And I go diagonally, not straight down, yes? How much pressure should I be putting on the chain with my finger? The manual and the service manual are kinda vague in my opinion. It’s a bit jerky at times shifting gears, like it’s trying to catch up…assuming tightening my chain will help? Edited May 21, 2023 by Cjanssen83 Link to comment Share on other sites More sharing options...
sweetscience Posted May 21, 2023 Share Posted May 21, 2023 Measure slack at the tip end of the second crest. Just left of where the green mark begins. You can check this by measuring the midway point between the front and rear sprockets' chain contacts. Measure slack perpendicular to swingarm. Put as much pressure on the chain until it can no longer stretch, which is not much. The important rule is to measure slack at the TIGHTEST point on the chain, as you will see there are loose and tight spots. So, I go with a 56 mm slack at its tightest spot on a paddock stand. Or 51 mm with the bike on its side stand. Happy trails! 1 Link to comment Share on other sites More sharing options...
ElGonzales Posted May 21, 2023 Share Posted May 21, 2023 Blue, shows the drawing in the user manual, using the sidestand. 15N pressure with the finger (or whatever) to the chain, says the user manual. 15N = 1,52 kg (15N / 9,81 m/s^2) 3 1 Link to comment Share on other sites More sharing options...
sweetscience Posted May 21, 2023 Share Posted May 21, 2023 Yes, I stand corrected, the blue zone is the right choice. +1 to ElGonzalez. The rollers on the chain will contact the track of the chain guide first. Link to comment Share on other sites More sharing options...
Cjanssen83 Posted May 21, 2023 Author Share Posted May 21, 2023 Ok, so blue mark. I think I did it from green last time. Cheers, mates! Link to comment Share on other sites More sharing options...
Cjanssen83 Posted May 21, 2023 Author Share Posted May 21, 2023 5 hours ago, ElGonzales said: Blue, shows the drawing in the user manual, using the sidestand. 15N pressure with the finger (or whatever) to the chain, says the user manual. 15N = 1,52 kg (15N / 9,81 m/s^2) How do measure Nm with finger pressure? …I googled and found that 1 Nm is like holding an apple, so I just push down on the chain with the force of 15 apples? …I feel like I’m in elementary math class again, lol! Link to comment Share on other sites More sharing options...
ElGonzales Posted May 21, 2023 Share Posted May 21, 2023 N is not Nm The pressure - force you should put onto the chain is 15N, which corresponds to a weight of 1.52 kg. Thats the weight of ~1.5 liters of water. You can convert it in any other unit of measurement, 3,30693 pounds for example. Don't blame me, thats the instruction of Yamaha and you asked the question Kick the chain up with the tip of your boot, if it moves approx. the width of a cigarette box chain slack is allright, this is my method 3 Link to comment Share on other sites More sharing options...
Global Moderator Pursuvant Posted May 21, 2023 Global Moderator Share Posted May 21, 2023 2 hours ago, ElGonzales said: Don't blame me, thats the instruction of Yamaha... ...Kick the chain up with the tip of your boot, if it moves approx... width of cigarette box...chain slack is allright, this is my method So much yes here for the cig method Kudos to @klx678 as a source, he checked the perpendicular distance with swingarm at bottom & top of travel, because he knows manuals have been wrong in the past. Link to comment Share on other sites More sharing options...
crakerjac Posted May 22, 2023 Share Posted May 22, 2023 A smiling chain is a happy chain. Link to comment Share on other sites More sharing options...
7fold Posted May 22, 2023 Share Posted May 22, 2023 Another tip for chain slack I read here a while back (I don't remember who posted it to give them credit, unfortunately) is that you can use a credit card to measure. The manual calls for slack between 51-56 mm (or 2.01-2.2 in) and your typical credit/debit/gift cards are ~54 mm (or ~2.1 in) so almost the middle of proper slack. Link to comment Share on other sites More sharing options...
Triple Jim Posted May 22, 2023 Share Posted May 22, 2023 I have a wedge of wood I cut so at one end the chain is at 2" slack, and at the other end it's at 2.2". If the 2" end goes in, but it doesn't go all the way though to the 2.2" end all is good. You just have to cut the wood at the slack specs minus 1/2 of the chain width. With the stock chain, that's 1.71" at the short end and 1.91 at the long end. 4 Link to comment Share on other sites More sharing options...
FZ not MT Posted May 23, 2023 Share Posted May 23, 2023 Right or wrong, I've been using the blue line - When I push the chain up toward that lip, if it touches the lip, it's time to tighten the chain.... seems to work for me. Link to comment Share on other sites More sharing options...
Triple Jim Posted May 23, 2023 Share Posted May 23, 2023 4 minutes ago, FZ not MT said: Right or wrong, I've been using the blue line - When I push the chain up toward that lip, if it touches the lip, it's time to tighten the chain.... seems to work for me. That's actually a pretty good way to check it. I just adjusted mine today with my wooden block, and if I use one finger to press the chain up pretty snugly, there's just about 0.2" of clearance. More fingers and I can make it touch, so the one finger thing is relevant. Link to comment Share on other sites More sharing options...
shinyribs Posted May 23, 2023 Share Posted May 23, 2023 If in doubt, make it looser. It won't hurt anything. Talked to a young guy once that was terrified of letting his chain get to loose and worried it would derail, get tangled and make him crash. Reddit had him worried to death. Unless your chain is obviously drooping like this, it's never gonna derail from being a bit loose. You're fine. 1 Link to comment Share on other sites More sharing options...
mt7fan Posted May 23, 2023 Share Posted May 23, 2023 Blue line. Difference between measured on centerstand and sidestand is 2 mm. Link to comment Share on other sites More sharing options...
Premium Member DewMan Posted May 23, 2023 Premium Member Share Posted May 23, 2023 15 hours ago, Triple Jim said: I have a wedge of wood I cut so at one end the chain is at 2" slack, and at the other end it's at 2.2". If the 2" end goes in, but it doesn't go all the way though to the 2.2" end all is good. You just have to cut the wood at the slack specs minus 1/2 of the chain width. With the stock chain, that's 1.71" at the short end and 1.91 at the long end. I like the Go/No-Go gauge functionality of your wood block. It's very much K.I.S.S. method. I'm gonna make my own now. Thanks for the idea Jim. 1 DewMan Just shut up and ride. Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now