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Post by Bozzy on Mar 23, 2024 0:00:22 GMT 1
Hi All,
So stripped motor and removed the selector drum. I noticed it has a sort of bearing when removing but its looks an odd bearing. I cannot find it anywhere to purchase. Is it a replaceable item?
Way off yet but thought I'd ask as its baffling me... how do people torque down the front cylinder bolts on the YPVS motor as I cant even get a socket in 2 of them as no room ie. its recessed.. Any guidance/link to special sockets etc you use to do this would be appreciated
thanks
Bozzy.
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Post by JonW on Mar 23, 2024 0:05:43 GMT 1
Motion pro do a special spanner. Its talked about elsewhere on the forum, worth a search.
The bearing is still available from Yamaha, are you looking at the parts books?
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Post by Bozzy on Mar 23, 2024 0:15:41 GMT 1
oh thanks... plan to visit local yam shop tomorrow as they going to remove the pressed bearing on gears. will ask.
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Post by JonW on Mar 23, 2024 0:16:34 GMT 1
No need to wait, the parts books are online, look at fowlers or CMSNL etc etc.
Pressed on gears?
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Post by Bozzy on Mar 23, 2024 0:19:14 GMT 1
Hi... The output shaft bearing nearest sprocket appears to be pressed fitted onto the shaft..
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Post by midlifecrisisrd on Mar 23, 2024 0:22:31 GMT 1
Shaft bearings just slide off
NK racing sell an offset spanner to go on the torque wrench
Steve
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Post by JonW on Mar 23, 2024 0:25:02 GMT 1
Hi... The output shaft bearing nearest sprocket appears to be pressed fitted onto the shaft.. As Steve says, it should come off. Do you have the haynes manual? Or downloaded OEM version, maybe from rd350lc.net? The manual is a must for answering questions or at least avoiding them coming up in the first place, all of which saves a lot of time and head scratching. |
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Post by JonW on Mar 23, 2024 0:28:32 GMT 1
Shaft bearings just slide off NK racing sell an offset spanner to go on the torque wrench Steve Once you find the spanner, put the name of it in google and you'll find who sells it. Dont rely on your yam dealer, the parts guy has likely never see or heard of your bike or have ideas about how to do the work. I'll help you out, but its not hard... this is the spanner: www.motionpro.com/product/08-0134 Google it to find the cheapest incl post and youre set. I seriously doubt your dealer will have one. |
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Post by shaunthe2nd on Mar 23, 2024 1:45:08 GMT 1
Make sure you use a Yamaha replacement bearing for that, long story but I accidently fitted a diferent bearing and couldn't select all gears and had to strip and rebuild engine.
I torque the top bolts, then losen off with normal spanner and retighten so I get the feel for strength required then try to repeat on the lower nuts. Hope that makes sense.
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Post by steve63 on Mar 23, 2024 7:59:10 GMT 1
Make sure you use a Yamaha replacement bearing for that, long story but I accidently fitted a diferent bearing and couldn't select all gears and had to strip and rebuild engine. I torque the top bolts, then losen off with normal spanner and retighten so I get the feel for strength required then try to repeat on the lower nuts. Hope that makes sense. I've never tried to find anything to torque those nuts. I'm too lazy and impatient so I've always used a ring spanner. My logic was that it would be pretty much impossible to strip them with a spanner about 120mm long 😆 |
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Post by headcoats on Mar 23, 2024 8:13:18 GMT 1
The barrel nuts like the head bolts may need another nip up after a few heat cycles
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Post by urbantangleweed on Mar 23, 2024 8:30:16 GMT 1
Ring spanner to tighten the barrel nuts, if you use 13mm nuts a ring/open end spanner facilitates the use of a 1/2 inch drive torque wrench if you really want to. If it's the selector drum caged needle bearing you need, Legend sell the right size.
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Post by dusty350 on Mar 23, 2024 8:45:01 GMT 1
The selector drum bearing is still available from Yamaha - 93315 23612, at a heady £16.90 now. The small screw needs to come out first - these can be tricky as they are made from cheese and will chew easily if you dont have the correct screwdriver. Once that and the cup it sits in are off, the star slides off and you then have a circlip to remove. I renew this as well as the bearing on rebuild, circlip part no. is 93440 34025 and that's £4.61 now. It's the same part numbers from Lc all the way through to the late Pv's, and removal and refit is the same between all. Page 1 in the Lc engine thread shows it; rdlccrazy.proboards.com/thread/57666/rd350lc-engine-strip-rebuildRead up on torquing the head bolts first before nipping up the barrel bolts too (YPVS models)   |
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Post by urbantangleweed on Mar 23, 2024 8:58:31 GMT 1
Read up on torquing the head bolts first before nipping up the barrel bolts too (YPVS models) Like Dusty says above, what I do is barrel nuts finger tight, head on, head bolts (with correct washers) on, nip up, torque to 15 then 17.5 then 20 foot pounds in the correct pattern, lastly, tighten barrel nuts. Doing it this way allows the barrels to pull up to the head first, if you tighten the barrel nuts first then the head bolts, it's very possible the head gasket will leak due to any tiny misalignment in height between the barrels. If using the usual black gasket, warm the engine for a minute or two WITHOUT coolant in it. I then let it cool down and then do it a further two times, then add coolant. This allows the black coating to "melt" to the surfaces of the barrels and head to create a seal. Never had a head gasket issue with this method whether using a genuine or pattern gasket. |
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Post by jon on Mar 23, 2024 10:41:02 GMT 1
Ring spanner to tighten the barrel nuts, if you use 13mm nuts a ring/open end spanner facilitates the use of a 1/2 inch drive torque wrench if you really want to. If it's the selector drum caged needle bearing you need, Legend sell the right size. Are you sure Legend sell the correct size? Can’t see it listed on their website. I only ask because a while ago Legend didn’t sell the correct size. Went to use one of their uprated bearings and it was too big on the O.D. To fit the cases. After many others complained about this they dropped the sale of that bearing. Jon |
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Post by urbantangleweed on Mar 23, 2024 11:03:22 GMT 1
Ring spanner to tighten the barrel nuts, if you use 13mm nuts a ring/open end spanner facilitates the use of a 1/2 inch drive torque wrench if you really want to. If it's the selector drum caged needle bearing you need, Legend sell the right size. Are you sure Legend sell the correct size? Can’t see it listed on their website. I only ask because a while ago Legend didn’t sell the correct size. Went to use one of their uprated bearings and it was too big on the O.D. To fit the cases. After many others complained about this they dropped the sale of that bearing. Jon I bought a few of these in October last year just to see, and they were fine www.ebay.co.uk/itm/111719735443 |
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Post by jon on Mar 23, 2024 11:11:23 GMT 1
Are you sure Legend sell the correct size? Can’t see it listed on their website. I only ask because a while ago Legend didn’t sell the correct size. Went to use one of their uprated bearings and it was too big on the O.D. To fit the cases. After many others complained about this they dropped the sale of that bearing. Jon I bought a few of these in October last year just to see, and they were fine www.ebay.co.uk/itm/111719735443Ah, their eBay shop. I was looking on their website. Perhaps after the oversized bearing issue they’ve sourced some that actually fit now by the sounds of it. Jon |
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