UK Monster Owners Club Forum - View Single Post

Mr Gazza · 14-02-2022, 07:44 PM

Nice one Roger I ordered my AG90 this morning.
I'm glad I asked the question because I went and bought what I thought would be the best stuff assuming that GL-5 would be better than 4, 3 or 2.

EP90 was the standard stuff for most bike gearboxes and was recommended by the manufacturers, (as you know). It has only emerged since the "classic era" that the Sulphur eats the yellow metal (brassy metals). When you think about it those still about today could have been marinating in Sulphur for 40-50 years or maybe more, whether in use or not.
Over 40 years in the case of my Norton. I never had any bother whatsoever with any AMC gearbox when I abused Ajay's about thirty years ago, but when I rinsed out the complete 'box off the Norton prior to refurbishment, I got what I thought was a lot of copperslip out of it. My engineer mate, Hutch, said "That will be the bushes!" He kindly replaced all the bushes and did a needle roller conversion on the output shaft, so all should now be good.

14-02-2022, 07:44 PM	#4
Mr Gazza Lord of the Rings Join Date: May 2013 Location: Norwich Bike: M900sie Posts: 5,848	Nice one Roger I ordered my AG90 this morning. I'm glad I asked the question because I went and bought what I thought would be the best stuff assuming that GL-5 would be better than 4, 3 or 2. EP90 was the standard stuff for most bike gearboxes and was recommended by the manufacturers, (as you know). It has only emerged since the "classic era" that the Sulphur eats the yellow metal (brassy metals). When you think about it those still about today could have been marinating in Sulphur for 40-50 years or maybe more, whether in use or not. Over 40 years in the case of my Norton. I never had any bother whatsoever with any AMC gearbox when I abused Ajay's about thirty years ago, but when I rinsed out the complete 'box off the Norton prior to refurbishment, I got what I thought was a lot of copperslip out of it. My engineer mate, Hutch, said "That will be the bushes!" He kindly replaced all the bushes and did a needle roller conversion on the output shaft, so all should now be good. __________________ Last edited by Mr Gazza; 14-02-2022 at 07:48 PM..