mainly because it ensures maximum tyre compression and contact area under a hard panic brake
Quotemainly because it ensures maximum tyre compression and contact area under a hard panic brakeThe opposite is true. If the load is being taken care of by the forks, the tyre isn't being planted on the road as hard. Less dive = more load on the tyre as the tyre walls will have to do the flexing instead.
[Noggy-esque post alert!] What I think you will have, is more weight transfer to the front, which puts the front tyre under more load,I would upgrade, either with fresh/thicker fork oil, and/or better springs, simply because the bike will be much more enjoyable, and somewhat safer to ride than with loads of dive.Just my thoughts, but always open to learning if I've got it wrong (again ).[/Noggy-esque post]
Quotemainly because it ensures maximum tyre compression and contact area under a hard panic brakeThe opposite is true. If the load is being taken care of by the forks, the tyre isn't being planted on the road as hard. Less dive = more load on the tyre as the tyre walls will have to do the flexing instead.If the front is more stable, you will get more confidence.
can excessive fork dive affect braking...............noyou have brake discs of a given size and a maximum amount of hydraulic pressure generated by the master cylinder.what it will affect is the steering (change of trail/rake) and at max compression the ability to absorb a bump shock.measure the amount of travel used with a cable tie around the fork, if you are using all the travel then either preload the spring or fit a firmer one until you have @15mm travel left after max compression.but tbh they're a pig on stilts anyway
Quote from: sadlonelygit on 02 July 2015, 11:04:56 amcan excessive fork dive affect braking...............noyou have brake discs of a given size and a maximum amount of hydraulic pressure generated by the master cylinder.what it will affect is the steering (change of trail/rake) and at max compression the ability to absorb a bump shock.measure the amount of travel used with a cable tie around the fork, if you are using all the travel then either preload the spring or fit a firmer one until you have @15mm travel left after max compression.but tbh they're a pig on stilts anyway Makes sense fella.....just couldn't get it straight in my head. Tend to do all my main braking before a corner and maybe adjust mid corner with rear brake, weight transfer or throttle so mullers those Fazer Thous in the twisties.
Will check the amount of travel I use.
You still get your braking done before committing, even with less dive, but with a well-controlled front set up, you can brake later, harder, and flip it in with everything working to it's optimum still. If you brake and get a lot of dive, and then if you have a low rate of rebound damping, the forks will spring out again when the main braking force is removed, so unsettling the bike, too much movement just as you want to turn in. ??? That makes a lot of sense Nick, must be my riding ability that has been compensating for a soggy front . That alone steers me towards progressives when I change the oil So let me have another stab at this . Once at full compression, the suspension has no further ability to adjust to keep the tyre on the road, and this is where the tyre risks becoming excessively loaded for the available grip? Errrrr, totally beyond me that one . And I think I get the rake/trail change thing too (me also) - compression effectively steepening the steering angle, much like dropping the yokes down the forks, to give quicker turn in (yep, got it). But it still needs more travel available to deal with any bumps etc. So it's a compromise between the two - you need some compression, but it needs to be controlled (damping, spring rate), both in total amount of travel, and rate of travel Errrrr, I think so . This suspension thing is confusing, but getting the idea that it's about the ability to adjust for different situations, so you can't generalise about one thing or the other. And you can't treat compression damping or too weak springs as an individual thing, but have to look at the whole operation of the various functions of the unit together. This is why I don't mess around with settings myself Good call
Quote from: Frosties on 02 July 2015, 02:05:29 pmYou still get your braking done before committing, even with less dive, but with a well-controlled front set up, you can brake later, harder, and flip it in with everything working to it's optimum still. If you brake and get a lot of dive, and then if you have a low rate of rebound damping, the forks will spring out again when the main braking force is removed, so unsettling the bike, too much movement just as you want to turn in. ??? That makes a lot of sense Nick, must be my riding ability that has been compensating for a soggy front . That alone steers me towards progressives when I change the oil So let me have another stab at this . Once at full compression, the suspension has no further ability to adjust to keep the tyre on the road, and this is where the tyre risks becoming excessively loaded for the available grip? Errrrr, totally beyond me that one . And I think I get the rake/trail change thing too (me also) - compression effectively steepening the steering angle, much like dropping the yokes down the forks, to give quicker turn in (yep, got it). But it still needs more travel available to deal with any bumps etc. So it's a compromise between the two - you need some compression, but it needs to be controlled (damping, spring rate), both in total amount of travel, and rate of travel Errrrr, I think so . This suspension thing is confusing, but getting the idea that it's about the ability to adjust for different situations, so you can't generalise about one thing or the other. And you can't treat compression damping or too weak springs as an individual thing, but have to look at the whole operation of the various functions of the unit together. This is why I don't mess around with settings myself Good call Glad you agree, but I have been known to be wrong ya know Funny how for years and years, I always just rode to my own (sometimes beyond ) limitations, and only bothered with the suzzies if they were obviously shot (also guilty as sin on all my bikes). This one has more serious mods in that department than I've ever had before, so now it's interesting to me to know why it works better, even if I'm not a good enough rider to explore it's limits (Noggy is ). It's quite possible that if I gave it to someone who really knew what they were doing, it could be better still, but it still handles far and away better than anything I've had in a long while. If you're happy with it then stick with it Nick.Hmmm...... I have become Noggy And glad to hear you're a brilliant rider Frosties, someday we'll have to get together and you can show me how it's done - maybe in return, I can give you a little topiary lesson; you'd like that, wouldn't you?
I had one of these ,and they are bouncy on the front I bought a kit from Jack Lilley Triumph I think which had up rated springs some preload spacers to sit on top of the springs and heavy fork oil But I don't think they still stock it now
LATE ENTRY:: More weight over the front wheel resulting from the nose dive (forks compressing) helps the bike slow quicker.Does your front often bottom out? Back wheel feel like it's leaving the road, skipping sideways? If yes to either then compression is probably too soft.
But as you met ion it feels harsh over poor rutted ground (I presume you're still talking about the front) this is indication of compression too hard. Oh a contradiction.
Also when riding give this a go...........DON'T PANIC
Quote from: midden on 02 July 2015, 03:48:45 pmLATE ENTRY:: More weight over the front wheel resulting from the nose dive (forks compressing) helps the bike slow quicker.Does your front often bottom out? Back wheel feel like it's leaving the road, skipping sideways? If yes to either then compression is probably too soft. But couldn't this also be due to lack of rebound damping on the rear shock? (I'll have Frosties' head exploding before I'm through here )Absolutely but that just adds to confusion. Question answered by dive essentially being good for breaking.QuoteBut as you met ion it feels harsh over poor rutted ground (I presume you're still talking about the front) this is indication of compression too hard. Oh a contradiction.Yeah leave out the contradictions will ya, ya goat shagger who let that one out the bag. More lover than shaggerQuoteAlso when riding give this a go...........DON'T PANIC Yeah, hospital food ain't that bad these days, and hedges are soft
Quote from: midden on 02 July 2015, 03:48:45 pmLATE ENTRY:: More weight over the front wheel resulting from the nose dive (forks compressing) helps the bike slow quicker.Does your front often bottom out? Back wheel feel like it's leaving the road, skipping sideways? If yes to either then compression is probably too soft. But couldn't this also be due to lack of rebound damping on the rear shock? (I'll have Frosties' head exploding before I'm through here )QuoteBut as you met ion it feels harsh over poor rutted ground (I presume you're still talking about the front) this is indication of compression too hard. Oh a contradiction.Yeah leave out the contradictions will ya, ya goat shagger QuoteAlso when riding give this a go...........DON'T PANIC Yeah, hospital food ain't that bad these days, and hedges are soft
My main advise is to renew the oil working on the basis that over time it most probably has lost its full efficiency. So to replace with the original spec 10w should in theory return damping to its original. Perhaps by slowing or smoothing the dive without reducing it. Going 15w could compensate any wear in the springs without going straight to the next problem of what rating spring should I go for. Which to me sounds like a minefield of opinions. Also since you found it springy when you first got it 15w may have helped then. I think if it does end up feeling too firm you might get away with taking a little out of each stanchion (how say others on this)I have two bottles of unopened 10w oil which I got on the panic of my weight making the front jumpy but as yet haven't used it due to this argument of putting 15w in. I should be a real candidate for the heavier oil but I rarely bottom out, if indeed I actually have and I improved things by lowering the preload from hardest setting.
Nick did you see my forks dive on entry to that one bend,,oh so did yours ,oh and also PieEaters ,a hell of a lot of late braking going on there
Ahaaaaaa - nope, no way Nick. Got an all singing/dancing 2 way upgraded Nitron rear shock fitted so
Orrrrrrrrrrrr, I could see if a certain someone wants to swap his Gen1 for it Nick knows which one...........and it's yellow!