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| MR250 Bearing kit https://vintagedirtbikeforums.alp-sys.com/viewtopic.php?f=21&t=3905 |
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| Author: | t.read [ Fri Dec 14, 2012 7:23 pm ] |
| Post subject: | MR250 Bearing kit |
I'm finally getting around to actually rebuilding my motor for this. Got slammed with work this past year and had a lot of racing going on last year. Didn't even get to this year unfortunately. But I finally was able to get that stubborn flywheel to come off which was a nightmare. Got the cases ready to split, so I'm looking around for bearings and seals. I was curious if the CR250 or MT250 of this year had the same bottom end, bearing sizes and all? I did a few searches, but didn't see anything that said for sure. I found a place on Ebay that has a bottom end bearing and seal kit for the CR for $70. |
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| Author: | safetyfast [ Sat Dec 15, 2012 9:12 pm ] |
| Post subject: | Re: MR250 Bearing kit |
You can compare the part numbers on a site that has the original microfiche. I've been using this one: http://honda.woodsfuncenter.com/fiche_select.asp |
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| Author: | t.read [ Sun Dec 16, 2012 9:57 am ] |
| Post subject: | Re: MR250 Bearing kit |
That's what I ended up doing. I looked at the Western Hills Honda parts fiche. Seems that all bearings from CR, MT and MR are the same except for the countershaft bearing. The mainshaft I guess you'd call it. I don't have my numbers in front of me, I wrote it all down, but I think the MR has a smaller one. I think the CR and MT were the same though. I'll put up a chart later on here for future reference for others. I found an eBay store, Boss Bearings, that had a CR bottom end kit that had every bearing but that one oddball. The MR has a 6304 which are easy to find as opposed to a 63/22 I think was the CR, MT number. |
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| Author: | b-joe [ Tue Dec 18, 2012 12:59 pm ] |
| Post subject: | Re: MR250 Bearing kit |
t.read wrote: I found an eBay store, Boss Bearings, that had a CR bottom end kit that had every bearing but that one oddball. 2 or 3 jears ago i bought there an engine bearing & seal kit for my 80 cr250. bearings were cheapest no-name, not C3 spec where needed. seals hat not the same spec as original, no dustlip , some were not as thick as it has to be. all shit, never more.... 
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| Author: | t.read [ Fri Dec 21, 2012 11:25 am ] |
| Post subject: | Re: MR250 Bearing kit |
Well, I was hoping I wouldn't have the same experience. All the bearings are either HBC(Chinese) or no name or part number at all. I'm sending them back and just ordering the part numbers from a bearing supply place I get other stuff from. Should've just done that in the first place. Thought if I get a kit, it would be easier. At least they will give me a refund, but it's going to be a pain in the ass shipping them back and waiting for one. Moral of the story, Boss Bearings lies. They told me all kits were Koyo, Nachi, or similar Japanese bearings. |
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