there was talk at some stage about getting some poly cush bushes made up, i wonder if anyone ever had any joy with them...

i read that somewhere as well???

...but seeing i am in the states i guess i will miss out if they are made, but i am in a very industrial area right now so maybe i could get some made where i am or somewhere else, do you remember exactly what they were made from?

obviously some type of polyurathane but which one?

if you know let me know

thanks

paul

i did find this place http://www.universalurethane.com/cus...FQXqnAodCWZMiA

i'll give them a call next week and see what the minimum quantity order is and an estimate of how much

good thing is i am working in a reverse machining shop right now so i can do that part for free and if need be machine the mold

so what i need to know is how many people are interested and if someone would be willing to purchase a large quantity if we have to buy a large quantity and be our own personal supplier, i would do this but being on a RTW ride i can't, also living in the states would make individual shipping too expensive...CaptMoto any suggestions?

Hunday in South Africa has made some, several people showed an interest in buying, but he hasn't been around the forum since.

See post #37 in this thread: http://www.xt660.com/showthread.php?t=10861

The thing about urethane is it comes in many guises. As far as I understand, there is a hardness rating for polyurethane which translates as an 'A' system. They basically stick a needle into a piece of PU and the machine tells them how much pressure/force it has exerted to pierce the item. The pressure reading translates to the 'A' rating. As far as skateboard wheels go, 95A is quite soft where as 101A is hard, bear in mind though with a skateboard, any shock transferred through the wheels is going to be amplified by the 7 layers of ply and ali trucks under your feet. I guess the chain/sprockets set up of bikes will be similair but I don`t really know. Sooooo, if we can pull something like this off, which IMO will be a good mod, we need to find out about what the optimum hardness/memory factor will be for the PU.
Here`s to hoping and good call paul :D

let me see if i can get a price and we can go from there, really it would be better if someone bought a quantity and became a supplier for us,

it seems to be a big failing on the bike

....mine have 40,000 miles on them right now :wtfk:

Yamaha South Africa said it's best to stay with their rubbers
A harder compound can damage the gearbox apparently
Maybe it's just that they can get their rubbers to be sold ever so often

Yeah, they would say that!

I will have a word with my boys at the franchise tomorrow and see what they think. Also it is their anniversary year this year and they are having a bigass open day. One of the more famous RTW dudes will be there doing the whole talk thing. I shall find out details and post up a thread for those who are interested. The whole shebang is in June and located in High Wycombe.

...also keep in mind here that's a good comment from a dealer so it creates consistent income, small but consistent... polyurethane can be made in the same density as rubber but it is more durable (longer life) if you read what FECK said above, he is right it comes down to density.

by contacting polyurethane experts i would think they have a better view from an engineering point over a dealerships "opinion"