sparkieb Posted August 11, 2019 Report Share Posted August 11, 2019 Has anyone ever had any made, mine are de-laminating and to be honest are knackered. Keep looking for good 2nd hand ones but none popping up so considering getting some made but the cost (looks like £350/400) is seriously putting me off. Cheers Mark Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 11, 2019 Report Share Posted August 11, 2019 (edited) Man that sounds a lot of $$$ for those yokes. They are so plain and simple. I know Jared Bates advertised NOS ones about 6 months ago for very low $$$. Jared no longer sells Montesa parts but the person who bought Jared's stock advertises Montesa parts on eBay (USA) Have you looked at the Spanish shops that sell trials bike parts from that era? Edited August 11, 2019 by feetupfun Quote Link to comment Share on other sites More sharing options...
barnesy Posted August 11, 2019 Report Share Posted August 11, 2019 A well know UK Bultaco parts supplier are breaking a 348 they may still have the the yokes available .. 1 Quote Link to comment Share on other sites More sharing options...
sparkieb Posted August 11, 2019 Author Report Share Posted August 11, 2019 Are they on the internet or phone based ? Quote Link to comment Share on other sites More sharing options...
bigshineybike Posted August 12, 2019 Report Share Posted August 12, 2019 I think he means Inmotion in staines. https://www.inmotiontrials.com/ Quote Link to comment Share on other sites More sharing options...
sparkieb Posted August 12, 2019 Author Report Share Posted August 12, 2019 Sorted ? the internets a wonderful thing. Thankyou everyone. Cheers Mark Quote Link to comment Share on other sites More sharing options...
dr nosh Posted August 13, 2019 Report Share Posted August 13, 2019 Not sure what you mean by 'de-laminating' The yokes are a one piece casting, machined, anodised. There is nothing there to 'de-laminate' If you mean the look of the yokes is poor, then polish them up/get them re-anodised. (Anodising is a surface modification microns thick, not a coating). I linished my yokes and then vapour blasted. Look like brand new. Quote Link to comment Share on other sites More sharing options...
MartinH955 Posted August 13, 2019 Report Share Posted August 13, 2019 I've got an early 247 that I brought for spares, the top yoke on that is doing the same thing, it looks like a bit of slate that is blowing apart. 1 Quote Link to comment Share on other sites More sharing options...
sparkieb Posted August 13, 2019 Author Report Share Posted August 13, 2019 Was told they are rolled aluminium, when im home i will send you a picture, they are corroding apart in layers Quote Link to comment Share on other sites More sharing options...
sparkieb Posted August 13, 2019 Author Report Share Posted August 13, 2019 On 7/26/2019 at 12:51 AM, feetupfun said: Corroded yokes is a common thing with 348s but there are usually some being broken down for parts in the UK. Be aware that the yokes from a 247 look very similar and will fit, but have slightly different geometry. Both 247 and 348 yokes were made from rolled aluminium plate which lends them to that sort of failure. I saw some NOS 348 yokes advertised a while back in the US. Sorry not allowed to mention suppliers on here. As for water getting inside things, one of my 348s came with collapsed forks and I found they were full of water. Lots of corrosion on the insides of the tubes. Was told they are rolled aluminium, when im home i will send you a picture, they are corroding apart in layers 1 Quote Link to comment Share on other sites More sharing options...
sparkieb Posted August 13, 2019 Author Report Share Posted August 13, 2019 Rolled aluminium plate ? Quote Link to comment Share on other sites More sharing options...
dr nosh Posted August 13, 2019 Report Share Posted August 13, 2019 Well that's a surprise. Rolled plate. I wonder why ? Picture of my yokes during assembly. Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 14, 2019 Report Share Posted August 14, 2019 5 hours ago, dr nosh said: Well that's a surprise. Rolled plate. I wonder why ? They used rolled plate because that was an economical way to make them. What do you think the expensive modern aftermarket yokes are made from? Quote Link to comment Share on other sites More sharing options...
feetupfun Posted August 14, 2019 Report Share Posted August 14, 2019 19 hours ago, sparkieb said: Was told they are rolled aluminium, when im home i will send you a picture, they are corroding apart in layers Don't worry I've got a set like that on my spares bike. Not pretty 1 Quote Link to comment Share on other sites More sharing options...
dr nosh Posted August 14, 2019 Report Share Posted August 14, 2019 6 hours ago, feetupfun said: They used rolled plate because that was an economical way to make them. What do you think the expensive modern aftermarket yokes are made from? Well I'm sure that some 'claim' to CNC machine from solid billets. Maybe they are using rolled plate also. I have never looked into it closely to be honest. 1 Quote Link to comment Share on other sites More sharing options...
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