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Post by pmatulew on Aug 16, 2015 10:53:56 GMT -5
So, my new Prodigy variator didn't come with a bushing/boss. I guess they assume you will re-use your original. Unfortunately my original is part of the problem.
The bushing has a little rust on it and I think that is what wore out the bushing inside my variator housing. I can't see installing the old and suspect part in a new variator and wrecking that one too.
So where do I purchase just the bushing/boss? Not having a lot of luck searching the web so far. Looks to be the standard size. 15mm inside, a bit over 24 outside and a bit over 51 long.
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Post by lain on Aug 16, 2015 21:07:39 GMT -5
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Post by tvnacman on Aug 17, 2015 6:18:14 GMT -5
no on the bushings I do have stock and performance variators for 50cc's.
John
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Post by beenriding on Aug 17, 2015 15:18:16 GMT -5
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Post by pistonguy on Aug 17, 2015 17:37:25 GMT -5
So, my new Prodigy variator didn't come with a bushing/boss. I guess they assume you will re-use your original. Unfortunately my original is part of the problem. The bushing has a little rust on it and I think that is what wore out the bushing inside my variator housing. I can't see installing the old and suspect part in a new variator and wrecking that one too. So where do I purchase just the bushing/boss? Not having a lot of luck searching the web so far. Looks to be the standard size. 15mm inside, a bit over 24 outside and a bit over 51 long. Match up with straight bore Wrist Pin, Tool Steele bunch a piston co. ou there that have a bunch of 24x15- wiseco.com, jepiston.com, cppiston.com |
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Post by pmatulew on Aug 17, 2015 17:49:27 GMT -5
Guess I'm going to just have to bite the eggroll.
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Post by lain on Aug 17, 2015 22:45:21 GMT -5
Guess I'm going to just have to bite the eggroll. Just clean it up, use some sort of rust remover (wd40 brand looks promising), lightly grease it, and reuse it. Just don't use sandpaper or anything abrasive to remove the rust. |
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Post by onewheeldrive on Aug 17, 2015 23:28:16 GMT -5
Whatever you decide just make sure the bushing (or boss) you do use fits with no play between it and the variator, when inserted. It probably will fit, but these variators are not all the same and mixing parts from different variators isn't always compatible. I would at least double check before using to be extra safe.
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Post by pmatulew on Aug 18, 2015 5:24:51 GMT -5
Definitely concerned about a replacement bushing fitting correctly. Every internet listing I find seems to have slightly different specs listed, (or none at all). Plus this is one of those Znen BN157QMJ motors that you always have to double check to everything to make sure which parts are standard and which are different. I was more than a little disappointed that there wasn't one included with the new kit that I could count on to mate up correctly. Especially since I spent the extra dollars to purchase a better quality name brand variator instead of a generic.
The original bushing seems to have lost it's chrome plating, (if it ever had any). Been through the normal learning curve of trying grease, and light oil, and graphite, and they all quickly gunk up and stick. I've needed to remove and clean the variator bushings at each oil change to keep it working correctly.
I'm surprised that the bushings are not more readily available as an individual item. That leads me to believe that they don't fail and require replacement all that often. Mine may be a one off defect. Or maybe the oilite bushing in the original variator was an inferior piece. Who knows? I'll just have to order a new bushing and twiddle my thumbs until it arrives.
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Post by spandi on Aug 18, 2015 8:20:36 GMT -5
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Post by pmatulew on Aug 18, 2015 11:13:12 GMT -5
Case in point: The one listed in the link is listed as 17mm inside. My current bushing and shaft are only 15mm.
This BN motor application is such a hybrid mash of parts I have to double check everything.
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Post by JerryScript on Aug 18, 2015 11:29:52 GMT -5
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Post by lain on Aug 18, 2015 13:21:43 GMT -5
A long time ago when I got my first variator repl,acement I did not get a boss also, I searched and searched and searched but all the ones I bought ended up being very slightly different. Like I have one with the same exact length and thickness and everything, but the ends instead of being flat are like curved sort of and it changes the way the variator works by a lot and even limits my "100cc" engine to 30mph because of the way it's made! I ended up finding another variator set that included the boss instead at the end as I was unable to find just the boss.
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Post by pmatulew on Aug 30, 2015 17:35:30 GMT -5
Just to close the loop... I purchased a new drive boss from www.scooter-assassins.com (Tainin City Taiwan). It was a bit more money than some of the other ebay listings, but I was fairly confident in the listed dimensions and that it would be a quality part. It arrived promptly and was a perfect match to the old part. Standard 125/150 boss even though it is a BN157qmj motor. 15mm inside, 24mm outside, 51 and change long. Also it was a nice clean shiny machine steel part, whereas some of the other ebay listings looked kind of suspect. Would have been a bummer to order a bargain part only to get a nasty slug. |
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Post by horace on Aug 30, 2015 17:45:08 GMT -5
Give a call to Scrappydog Scooters....... Talk with a human that maybe able to point you in the right direction.
Just a shot in the dark guess.
GOOD LUCK!!!!!!!!
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