My suspension on the front is very soft and also im a big guy 6,2 +100 kg I have no leaks and the stroke is smooth so its not a mechanical just old soft springs My question is has anybody fitted washers to stiffen the spring and how many washers and what effect did it have A thicker oil will slow the movement but will not stop it also will fzr 400 springs fit and are they stiffer?
It is not just the springs. The damper rods are set up for Japanese tastes and rider size. I fitted cartridge emulator valves for a big improvement. Racetech and YSS sell them. Rather than preload the springs you can make them stiffer by removing some coils from the tightly coiled end using an angle grinder and then add a spacer. Read this Racetech article to work out how long the spacer should be: http://racetech.com/articles/SuspensionAndSprings.htm
Mine are the same ... I can nearly bottom them out just by pushing down on the bars. Im also 100kg+ so Ill be following Marks advice also......eventually ! Heres whats presently in mine.....
I'm no expert on springs, however a few years back I bought an SV650 Suzuki. Loved the bike, fun to ride until you hit the front brake and drastic sag took place. I purchased off a crowd in Melbourne a set of progressive springs, twice the length of the original so the spacers had to go, result was outstanding. This springs came from California and were great. Certainly made riding so much better.
you can get fzr400 progressive front springs from the states for 145 us dollars including freight.are the 400 forks the same as the 250 ones?
FZR250 front fork part no. 3LN-23103 FZR400 front fork part no. 3EN-23103 Ikon Suspension Fork Spring Application List http://www.ikonsuspension.com/content/application_lists/fork_springs/yamaha_fork_application.shtml http://2fiftycc.com/index.php?threads/cbr250r-mc19-front-fork-springs.1312/#post-7691
Yes as above race tech sell fzr 400 springs has anybody cross referenced the the part numbers the 250 part number is 3ln-23141-00 seems a common spring entered 23141 into ebay and they are used on a good few yamahas
I just put a pair of the FZR400RR RaceTech non progressive springs in the track bike (FZR250RR 3LN) and boy did that make a difference. No more diving for China under hard breaking, much better feed back from the front tyre and super confidence. Can't wait to get back to the Island to beat my lap times. ;-)
what springs did you put in exactly on the race tech site and when you ordered did you do it online or ring them because the list a few spring rates depending on weight but even still its hard to judge because the could be very track orientated rather the fast road setup also do you get both springs its unclear when ordering if its a kit or not?
Track setup can be a lot different from road setup. For the track I run non progressive and for the road I run progressive.
Yea u need to decide which ones u want first..... http://www.moto-racing.co.uk/Guides/LinearVsProgressive.html And Id presume it comes as a kit.
Just finished reading linear versus progressive??? Very interesting points raised on both types and the conclusion is like everything today, on the money. The decision rest with the individual as to what they require from their suspension. Having never raced a motorcycle, my input is nil, the progressive spring fitted to my road bike exceeded all my expectation and provided excellent stability and handling. Seems that most racing bikes use non progressive springs, one would assume that they know what's best. Think I'll leave it at that!!
My way of looking at it very basically ... the progessive springs come as default in a road bike to cover different conditions and rider size that it will be used for straight off the shelf ..... it then covers small bumps and then bigger bumps,rougher conditions etc. Track bikes obviously will be using a track that will in general be very smooth compared to public streets and roads and therefore just have a single rate of compression. (correct me if Im wrong!) Heres some more reading to really fry your brain..... http://www.peterverdone.com/archive/springs.htm
