|
|
Post by liffy16 on Jun 13, 2019 19:50:59 GMT 1
When assembling crankcase do you three bond around seals As well as the crankcase faces or just three bond the faces ?
|
|
|
|
Post by dusty350 on Jun 13, 2019 19:53:41 GMT 1
You only need to put 3 bond on the mating face of the lower crank case. New, genuine seals will be fine without goo around them  Dusty  |
|
|
|
Post by andy748 on Jun 13, 2019 20:01:35 GMT 1
What Dusty said! Don't forget to put a smear on the crank drive side woodruff key to seal that. Andy.
|
|
|
|
Post by liffy16 on Jun 13, 2019 20:02:13 GMT 1
Thanks Dusty anyone risked using pattern seals
|
|
|
|
Post by midlifecrisisrd on Jun 13, 2019 20:04:44 GMT 1
Thanks Dusty anyone risked using pattern seals I would only use genuine crank and sprocket oil seals The rest are fair game as easily changed Steve |
|
|
|
Post by dusty350 on Jun 13, 2019 20:19:31 GMT 1
+1 on genuine seals. Can be an expensive nightmare otherwise  Dusty |
|
|
|
Post by bazzer5115 on Jun 13, 2019 20:46:27 GMT 1
Yambits crank seals are known to fail in as little as 1,000 miles.
They’re made of cheese!!!
Only ever use genuine crank seals unless you enjoy taking your engine apart instead of riding your bike!!
|
|
|
|
Post by pdxjim on Jun 13, 2019 21:10:37 GMT 1
Ugh. Done Shambits seals on my recent rebuild. Where were you two months ago? Cyls are off for porting. Split the cases and swap for genuine or crack on forward? What Dusty said! Don't forget to put a smear on the crank drive side woodruff key to seal that. Andy. More on this ^ please. |
|
|
|
Post by midlifecrisisrd on Jun 13, 2019 21:27:47 GMT 1
Ugh. Done Shambits seals on my recent rebuild. Where were you two months ago? Cyls are off for porting. Split the cases and swap for genuine or crack on forward? What Dusty said! Don't forget to put a smear on the crank drive side woodruff key to seal that. Andy. More on this ^ please. Personally I'd split and change while you can A lot less painful than a seal failing and the lean mixture causing a seizure of your newly sorted cylinders As for sealant on the primary key I have never done this The old air cooled motors has a special o ring but it was deleted. As well as the keyway there is the complete inner face of the gear and the thread on the end Personally I build the motor with nothing on that area other than some thread lock then pressure test. I've only had one leak which I then removed the nut/washer, apply a thin s.ear on the conical washer then nip back up with thread lock again. Steve |
|
|
|
Post by stusco on Jun 13, 2019 21:37:19 GMT 1
+1on thread lock
|
|
|
|
Post by pdxjim on Jun 13, 2019 21:46:49 GMT 1
Anyone point me toward a genuine seal kit or UK Yam dealer willing to ship?
I'm in the states, so can't just pop over to my local dealer ... unless the seals are same as aircooled/YPVS/Banshee?
A little leery to order off theebay as no telling how old and dried out they'll be.
|
|
|
|
Post by midlifecrisisrd on Jun 13, 2019 21:49:18 GMT 1
Anyone point me toward a genuine seal kit or UK Yam dealer willing to ship? I'm in the states, so can't just pop over to my local dealer ... unless the seals are same as aircooled/YPVS/Banshee? I'm sure Fowlers or norbo will ship I think they may be the same as ypvs/banshee Steve |
|
|
|
Post by oldelsieboy on Jun 13, 2019 21:50:46 GMT 1
|
|
|
|
Post by fozzy17 on Jun 13, 2019 21:51:22 GMT 1
Anyone point me toward a genuine seal kit or UK Yam dealer willing to ship? I'm in the states, so can't just pop over to my local dealer ... unless the seals are same as aircooled/YPVS/Banshee? A little leery to order off theebay as no telling how old and dried out they'll be. see if these ship they pretty good www.fowlersparts.co.uk/browser/manufacturer/yamaha/bike/rd350lcor pull the part numbers and search that in usa |
|
|
|
Post by pdxjim on Jun 13, 2019 22:03:41 GMT 1
LOL. Thanks for enable-ing my extreme laziness and saving me the arduous task of finding the part numbers and a simple google search. Have ordered loads of stuff off boats.net thru the years. ... and yes, same part numbers as Banshee. |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 14, 2019 1:39:40 GMT 1
i think you will have to go through Partzilla now, Boats.net doesn't seem to advertise their motorcycle parts on that side of the company
Partzilla is part of Boats.net
|
|
|
|
Post by JonW on Jun 14, 2019 3:14:07 GMT 1
Don't forget to put a smear on the crank drive side woodruff key to seal that. Andy. Andy, do you mean to hold in the seal or the key itself? Ugh. Done Shambits seals on my recent rebuild. Where were you two months ago? Er, the forums are all awash with the info that you should avoid Yambits crank seals, Im shocked youve not seen that info to be honest :/ Partzilla and boast are the same company as Howard says, easy to buy from tho and cheap enough when in the USA, its unlikley your dealer will be cheaper unless you are well acquainted. |
|
|
|
Post by pdxjim on Jun 14, 2019 4:10:14 GMT 1
I take full responsibility
I ordered the seals months ago before I got into the forum.
Now that I’ve received some more bogus parts (besides the seals) I know what the fuss is about.
Plenty of cheap online sources for US market parts here, so anything that cross references to the RZ or ‘Shee is fair game
|
|
|
|
Post by JonW on Jun 14, 2019 4:34:07 GMT 1
Yep, weve been buying them for years |
|
|
|
Post by andy748 on Jun 14, 2019 6:31:08 GMT 1
I take full responsibility I ordered the seals months ago before I got into the forum. Now that I’ve received some more bogus parts (besides the seals) I know what the first as is about. Plenty of cheap online sources for NA market parts here, so anything that cross references to the RZ or ‘Shee is fair game just put a small smear on the end or the steel key and a smear in the groove it sits in, don’t over do it though. Andy. |
|
|
|
Post by JonW on Jun 14, 2019 6:49:47 GMT 1
Ahh i see, to avoid any leakage past the machined edges etc. Good call.
|
|
|
|
Post by dusty350 on Jun 14, 2019 6:55:19 GMT 1
I do now put some 3 bond on the square key that locks the primary gear to the crank. I never used to, and never had any obvious problems, but I did read a member had a leak from this area, so it does no harm to do as Andy says, and put some on the key when fitting. I'm sure threadlock works in the same way. I always use a new, genuine key, and normally a new/refurbed crank so that makes a difference too Dusty |
|
|
|
Post by jackjabba on Jun 14, 2019 8:37:10 GMT 1
The great Yambits crankshaft seals debate continues. My 250 had them in for years with no problems at all. Only changed them last year due to doing a complete engine rebuild. My guess is that most of the failures are caused by the people fitting them. The forums and Facebook groups are full of people who have no idea what they are doing. Fitting seals in back to front. Asking if they can be changed without splitting the cases, etc. There are lots of clever owners out there, but it doesn't make them mechanics.
|
|
justyr
Thrash Merchant
Posts: 331
|
Post by justyr on Jun 14, 2019 9:01:25 GMT 1
No the Yambits seals are inferior quality. It’s not due to people not knowing what they’re doing, although obviously a percentage of fails of both pattern and genuine seals could be due to poor assembly.
I’ve rebuilt several motors and only one ever failed, when I used a Yambits rh crank seal. I learned my lesson.
|
|
|
|
Post by alankelly on Jun 14, 2019 18:34:17 GMT 1
I do now put some 3 bond on the square key that locks the primary gear to the crank. I never used to, and never had any obvious problems, but I did read a member had a leak from this area, so it does no harm to do as Andy says, and put some on the key when fitting. I'm sure threadlock works in the same way. I always use a new, genuine key, and normally a new/refurbed crank so that makes a difference too Dusty Hi As Dusty said i had a big leak from this area.  IMG_5825[1] by Alan Kelly, on Flickr In fact it was quite a surprise and never would have suspected a leak from here. As the leak as shown in the video above was down the key way, and then between the primary gear and pump gear. But all sorted it with a blob of Threebond as Dusty recommended Best wishes Al. |
|
|
|
Post by stusco on Jun 14, 2019 18:41:25 GMT 1
Yep mine leaked there as well I used some thread lock on the key
|
|
|
|
Post by liffy16 on Jun 14, 2019 18:56:45 GMT 1
Just to add to the yambits debate I have some seals off them and they have the same makers mark on them as original??
|
|
|
|
Post by midlifecrisisrd on Jun 14, 2019 19:03:36 GMT 1
Just to add to the yambits debate I have some seals off them and they have the same makers mark on them as original?? I think the problem may be they are not always getting the same make of seals so there are some sh1tters out there Just not worth the risk if you can avoid it Steve |
|
|
|
Post by pdxjim on Jun 14, 2019 19:17:33 GMT 1
Just to add to the yambits debate I have some seals off them and they have the same makers mark on them as original?? I seem to remember seeing KOYO on the Yambits seals but may have been wishful thinking on my part |
|
Deleted
Deleted Member
Posts: 0
|
Post by Deleted on Jun 15, 2019 9:11:51 GMT 1
Just to add to the yambits debate I have some seals off them and they have the same makers mark on them as original?? Me and a mate pulled gen yam ones out of the bag and the same with the yambits. Same mark . Didn't believe it till he showed me. |
|
