chrisk
Drag-strip hero
Posts: 281 
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Post by chrisk on Feb 28, 2017 3:12:56 GMT 1
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Post by JonW on Feb 28, 2017 4:05:05 GMT 1
Same ones TSS and FFTP used to sell i think and proven to work if so.
milage, well... rubber just doesnt like the heat and the oil really and will always eventually die.
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Post by bare on Feb 28, 2017 4:13:03 GMT 1
Take a carefull look at the condition of the PV's Ali Bearing shaft bits.
Even Pressed in oilite bushings are several orders of magnitude harder / longer wearing.
Foolish...pointless actually, to replace those if the PV shafts/bearing surfaces are worn out.
Be surprised if they weren't :-)
CLEVER to have the PV's Sleeved with steel tubes and your Existing Bushes reamed to fit those sleeved shafts.
Likely a helluvalot cheaper and decidedly more durable.
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Post by Norbo on Feb 28, 2017 9:07:49 GMT 1
new gen yam ones are £87 dont think id trust the seals but the bushes should be ok
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chrisk
Drag-strip hero
Posts: 281
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Post by chrisk on Feb 28, 2017 9:39:36 GMT 1
Thanks all.
I've asked them what the seals are made from.
Will post the reply.
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chrisk
Drag-strip hero
Posts: 281
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Post by chrisk on Feb 28, 2017 11:01:31 GMT 1
Reply.... "don't know the the exact terms or specs as we don't make them, but the red seals are silicone based and the black rubber"
Make of that what you will.
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Post by 4l04ever on Feb 28, 2017 19:42:42 GMT 1
Not sure about the quality of their parts.... The YPVS clutch arm bearing and the gear drum bearing they sell are both oversize by about 0.05mm. I am going to bin them and get some OEM Yamaha ones.
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Post by stusco on Feb 28, 2017 20:07:26 GMT 1
Not sure about the quality of their parts.... The YPVS clutch arm bearing and the gear drum bearing they sell are both oversize by about 0.05mm. I am going to bin them and get some OEM Yamaha ones. But they have more needles so must be better😜 |
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Post by 4l04ever on Mar 1, 2017 9:48:30 GMT 1
Not sure about the quality of their parts.... The YPVS clutch arm bearing and the gear drum bearing they sell are both oversize by about 0.05mm. I am going to bin them and get some OEM Yamaha ones. But they have more needles so must be better😜 They must be bigger needles too, which is even better! I was thinking about heating the casing up and freezing the bearings, but the OEM clutch arm bearing is a tight enough fit, so an even tighter fit may not be removable in the future without causing damage. The Gear selector drum bearing would be easy enough to fit with heat/freezing etc, but again would be a lot more difficult to remove in the future. The bearings say the sizes...i.e. 42 36 12 for the gear selector drum bearing, which match the OEM bearings numbers, but not made accurately enough, so are either B-grade parts, or knock-offs from China.... |
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Post by JonW on Mar 1, 2017 12:26:25 GMT 1
Mental... you dont need an uprated shift drum bearing or a clutch arm brg... neither do very much work at all, only ever shifting a fraction of a turn at a time.
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Post by 4l04ever on Mar 1, 2017 12:40:45 GMT 1
I was just only aiming at replacing my 30+ year old bearings as the Legend ones seemed a good price - about half the Yamaha prices, not really after uprated, just newer.
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Post by muttsnuts on Mar 1, 2017 12:46:43 GMT 1
considering the work involved at getting at both those bearings its false economy (IMHO) to fit cheaper aftermarket parts that aren't quiet right, I'd just bite the bullet and fit the genuine Yamaha ones, but that's me !
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Post by stusco on Mar 1, 2017 16:06:00 GMT 1
I had to dremmel the clutch arm bearing as it would not budge even with a puller ,I won't be changing one of them again if I can help it
Never had a problem changing the shift drum bearing
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Post by skydemon on Mar 1, 2017 17:02:04 GMT 1
Well said Dave. Don't spoil a cake for a cherry 👈🏼
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Post by 4l04ever on Mar 1, 2017 18:13:40 GMT 1
Hopefully everyone now knows that the Legend bearings are not fit for purpose....just fit for the bin :-)
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Post by JonW on Mar 1, 2017 23:01:01 GMT 1
Fair points well made, I always swap these bearings as most of my old parts are very well used, but only every fit OEM for those.
There were also some horrors of clutch and other plain bearings that TSS and I think Legend sold, those never fitted either. On the other hand the uprated transmission bearings were fine. pays yer money and takes yer choice as they say...
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Post by bare on Mar 2, 2017 0:27:14 GMT 1
considering the work involved at getting at both those bearings its false economy (IMHO) to fit cheaper aftermarket parts that aren't quiet right, I'd just bite the bullet and fit the genuine Yamaha ones, but that's me ! Yeah I did that.. believing it too... Got New oem yama bushes. All of them. Their tolerances were widely differing. Laughably so imo. Don't believe the Brochure Babble claims by some re clearance sizing to suit temperatures anticipated. Again; Have a capable Shop heat shrink on steel sleeves to the PV shafts .. Then ream the existing Bushes for a considered fit. Easy, fairly inexpensive and a Permanent 'fix' |
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Post by 4l04ever on Mar 6, 2017 11:32:01 GMT 1
Got my OEM Yamaha Clutch Arm Bearing, and that is slightly oversize too. Measures 21.53mm, so the Legend ones look like they will be okay to use at half the price too. They are within 0.01mm of the OEM part.
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chrisk
Drag-strip hero
Posts: 281
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Post by chrisk on Mar 6, 2017 12:54:19 GMT 1
Got my OEM Yamaha Clutch Arm Bearing, and that is slightly oversize too. Measures 21.53mm, so the Legend ones look like they will be okay to use at half the price too. They are within 0.01mm of the OEM part. Quite a few oem parts have changed. One I have noticed visually is the small input shaft bearing, I believe original did not have the groove. I tried old and new (gen) on a shaft, and the old (no groove) had less play. |
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Post by ianboom on Aug 10, 2019 18:27:12 GMT 1
Did a search on Legend as I couldn't fit the gear change drum bearing as it was too big by 0.05mm, seems like I'm not the only one with a problem.
I keep saying I'll stop buying second hand or cheap parts.............
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Post by Yogi on Aug 10, 2019 18:30:09 GMT 1
Did a search on Legend as I couldn't fit the gear change drum bearing as it was too big by 0.05mm, seems like I'm not the only one with a problem. I keep saying I'll stop buying second hand or cheap parts............. I binned 3 of them a few years back,it don’t look like they’ve sorted them still 😡 |
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Deleted
Deleted Member
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Post by Deleted on Aug 11, 2019 14:25:11 GMT 1
Didn't want to hear that, just bought one of the shift drum bearings from Legend, only 10 quid but still !!!
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Post by JonW on Aug 25, 2019 13:23:49 GMT 1
The later supplied TSS ones didnt fit either, originally he supplied OEMs in packets but later they were obviously from another source.
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