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Post by hopwheels on Jul 14, 2006 11:03:00 GMT -5
Considering some of the spark issues of late, thought this was worthy of its own thread. Found a source in Canada for rebuilding the stator on SR's. $200 plus shipping and same day service! That seems like a great price to me. I'll be sending one (or perhaps two) soon, and will report my experience. So far, they answered my initial email inquiries within 30 minutes. Pretty cool! www.rmstator.com |
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Post by tradrockrat on Jul 21, 2006 0:16:40 GMT -5
Keep us informed - I have two that need fixing
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Post by shibuyagas78 on Aug 29, 2006 8:51:25 GMT -5
Does anyone have the part number for the original SR Stator???
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Post by G Man on Aug 29, 2006 10:35:13 GMT -5
This was the number that we crossed over to in late '02: 4R8814005000. Yamaha Canada special ordered it for me through Yamaha Japan. Hope this helps, G Man  |
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Post by sjef on Aug 29, 2006 16:55:24 GMT -5
There are 3 original stators
for the 2j2/2j4 it is 4R8-81400-50-00 as Gman already stated
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Post by shibuyagas78 on Sept 1, 2006 6:39:30 GMT -5
Thanks for the parts #'s guys, i appreciate it.
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Post by hopwheels on Oct 15, 2006 9:45:55 GMT -5
Sent one stator out last week to RM Stator. I'll let you guys know what the result is. Hopefully the "heart" of my '79 will be good as new and I can get 'er running.
Gary
Hopwheels
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Post by yamatopdog on Oct 15, 2006 12:54:06 GMT -5
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Post by yamatopdog on Oct 15, 2006 13:02:26 GMT -5
shi, for some reason that won't go directly there,for that page go home,click on sport in mid of page,click on parts+service on top, click view parts catalog on left then fill in the info for the model you want.Bob
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Post by hopwheels on Oct 17, 2006 13:32:05 GMT -5
UPDATE: I am a DOOFUS. Not that that is any big news flash... ;D
Well, let me be more specific... an electrical system doofus. A nice gentleman from RM Stator just called me, and he's getting all the correct resistance readings from my stator. They did all the checks they can, and he thinks it's fine. And since he can't bench test it on the motor, or in its full system, they can't do anything more.
So, my ability to use a multimeter gets called seriously into question (for some reason ALL electrical stuff is like magic to me, my electrical engineer brother got all that gene junk), and my part gets a nice tour of our friendly neighbors to the north countryside.
It's winging its way back to me now. Gotta really compliment RM Stator, 'cause they could have futzed around for a couple of days and sent it back to me full charge, and I would have been none the wiser. Great company obviously.
I should be clear too, the unit I sent is a spare. Not even the one on my '79. So, when the good unit arrives back, I'll swap it out on the '79 and see what happens.
Humbled by my ignorance once again, and keeping my fingers crossed, I remain...
Gary
Hopwheels
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Craig
Junior Member
Posts: 66
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Post by Craig on Oct 26, 2006 8:11:23 GMT -5
Hopwheels, keep the flywheel and stator together - don't mix the two sets up - the flywheel and stator are a matched pair. Rgdz CL |
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digiroc
Junior Member
1978 SR500E
Posts: 85
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Post by digiroc on Jun 19, 2007 17:40:00 GMT -5
... keep the flywheel and stator together... the flywheel and stator are a matched pair.Rgdz CL This is not true as I just swapped stators and kept the original flywheel as it was cleaner. The bike runs great, and starts on the first kick. |
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Post by frankyb on Jun 19, 2007 18:49:57 GMT -5
Hi guys, im with digiroc on this matched pair thing. I sourced a stator from Melbourne, had it modified, and used a flywheel that came from southwest wreckers in Sydney. No problems with it, and four years later, still no problems.There must be a reason for this matched pair story, but i dont know what it is. Anyone out there know? Cheers Franky b.
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Post by wotavidone on Jun 20, 2007 2:00:05 GMT -5
I speculate that when Yamaha say these things are matched, it is to do with accuracy of the ignition timing marks in relation to Top Dead Centre, etc.
They are probably saying "we only reckon this flywheel mark is truly indicating the spark is firing at the correct degrees if it is used with this particular stator."
For an unmatched set, the only way to check everything is spot on would be to confirm all the marks with a dial guage, a degree wheel and a timing light.
If the bike is running OK, not pinging, not getting hot, starting easy, isn't gutless, etc, then no need to worry.
It may also be that machining and manufacturing tolerances weren't as good as they would have liked, and maybe they could not guarantee the correct flux gap, unless they matched them up. The result of too large a gap between the stator cores and the flywheel magnets would be poor output from the generator, i.e. low charge rate.
Mick
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Post by colinjay on Jun 20, 2007 2:17:19 GMT -5
Hi all,
I was also told of the matched stator/flywheels sets years ago but have never had problems with unmatched sets in all the years I have been playing with SR. In fact I doubt if any of my bike (except my SR400 which I havn't had the engine a part) are running with their original stators and flywheels.
Back in about 1997 or 2000 (I can't recall which year) I had one of my stators rewound by Small Coil Rewinds in Geelong, VIC, who did a good job if anyone in AUS is looking to have a stator repaired.
From my knowledge of electrics (25 + years in the electrical/electronics trades) I can't think of any electrical reasons for the matching pairs thing. It is posible that it come about due to the clearances between the stator iron core and the rotor magnets, as this measurement can be critical in some systems and there could be a posibility of poor performance if the clearance was to large and or mechanical contact if the clearances were too small. Mind you this is just a guess.
CJ
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