Bien voici finalement l'explication :content: de la dimension du réservoir
et pourquoi Yamaha ne fourniront pas de réservoir plus gros pour les modèles FX Nytro pour les sentiers :quoi:
Tirer du BLOG de Christ Reed voici le texte....Malheureusement
:triste1: il est en anglais, si vous avez des problèmes faites signe puis on essaiera de vous résumez les propos de Christ en français :réfléchi2:
Lets start with our fuel capacity right across the line. We have reduced the capacity in all our sleds (just a little) but not for the reasons of a lighter wet weight as has been suggested. What really happened is a result of something much greater. EPA regulations have become more stringent including the ones covering fuel-tank permeability or fuel lost to the atmosphere through evaporation. We have had to change the property and thickness of the fuel tanks to reduce the amount of loss and in the process, lost some capacity.
Now lets look at the FX Nytro and its smaller 27 liter tank. The capacity fits the concept of a lightweight bump sled (don’t forget the Nytro weighs the same as the current (non-XP) skidoo REV which has been the ‘holy grail’ of bump-sleds for many riders since 03). We know there is a demand for a larger ‘touring’ type fuel tank and we moved forward to see if we could build one for OE replacement. The conclusion is: we tried and we simply cannot… Why?
As a large international company, we must show due diligence with regards to product compliance regulations and ensure our products pass all the required tests. I took a very quick look at the tests for fuel tanks which are performed by third party, government approved agencies like US Testing Inc. according to SSCC standards to determine compliance. Here’s some of the details. A fuel tank must exceed its rated capacity by a minimum of 10% to allow for expansion (hence the sleeve in the filler neck). The tank must pass a drop test where it is filled full of fuel, sealed, cooled to -40F then dropped from a distance of four feet onto a smooth surface. Next the test is repeated after heating the full tank to +140F before being dropped. It is then sealed and weighed full of fuel and stored for 30 days in a controlled environment before being weighed a second time. It must not loose more than 3% of its weight due to permeation. Then there is a sunlight / UV test which determines the level of opaque, a pressure test, a brittleness test and a thermal cracking test. I probably missed a couple more but you get the picture… If it fails any of the above, it doesn’t go on a Yamaha.
We are now communicating with some after-market vendors who may be interested in producing some fuel tanks for special niche or competition markets. They would be responsible for the design, construction and marketing of their products without our direct endorsement. We are also looking at some accessory ‘fuel caddy’ devices to offer additional fuel storage without replacement of the OE spec tank. I thought I would update you on the facts. We hear your requests and we are trying to provide some solutions. We won’t have the final answers for some time yet.
I can also assure you our engineers are working on counter-measures and tweaks for the majority of the complaints and suggestions we have received from the field including the forums
but like the days of old, we won’t say anything until all the planets are aligned and the ’sun is eclipsed by the moon’ … or will we?
Un gros merci à Chris pour ses chronicles de plus en plus intéressante
We do these thing not to escape life, but to prevent life from escaping us !!!!!!!
Au bout d'une belle ligne droite.... Y'a toujours une courbe!!!!!!!!!!!!!