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Post by hudson on Nov 21, 2019 1:13:41 GMT -5
If we are looking for a replacement starter clutches, I thought it might be of use to have the dimensions for reference. Outside diameter ( Inside of Sprocket) 2.614 inch ( 66.4mm ) Inside diameter ( Starter gear hub ) 1.955 ( 49.66mm) Width .730 ( 18.54mm ) There is enough material in my opinion to add up to 5mm O.D. By boring the sprocket hub or 5mm smaller I.D. by turning down the starter gear and possibly another 2 mm of width if needed. I think both of these parts are thru hardened ( heat treated ) if they are only case hardened ( Shallow hardness on the surface ) would require re case hardening and probably not worth the trouble to do then. If replacements are found close to original dimensions or with one or two matching dimensions then this could be an affordable repair, especially if we are remachining worn surfaces. Also I.D. or O.D. could be sleeved if needed. Parts would need to be machined with a cylindrical grinder as was done originally or done in a lathe with a tool post grinder because of their hardness. I'm sure this would be less expense that getting a small batch made. I am also curious if the failures mentioned are the early version shown in Suzuki's technical bulletin "RE-6 " ( listed under resources "service bulletins" on this site ) used before engine # RE5-12054
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Post by goandy on Nov 21, 2019 3:28:56 GMT -5
Nice reference material there Hudson, good job.
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Post by timpa136 on Nov 21, 2019 15:11:28 GMT -5
Thank You for that valuable information. I see the early style sprag washer and from memory, the new starter clutch must use
the new clutch washer. Years back I had a late washer tested for hardness but am unable to recall now.
I have not experienced any slippage with the late design.
EDIT: I experienced my first late type starter clutch slip once this AM.
Temps had been cold and I was not using my normal gear lube, not sure what caused it. Tim
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ap951
2nd Gear
Posts: 280
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Post by ap951 on Nov 22, 2019 17:50:11 GMT -5
That's good observation & the material can be removed properly with the right equipment. You would need to find a machine shop with an O.D. & I.D. precision grinder along someone that knows what they are doing
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Post by charles on Nov 28, 2019 1:21:24 GMT -5
Got an E-Mail for an Ebay item for the SV/VStrom Series: www.ebay.com/i/382659588418?ul_noapp=trueThere are several Sprag Clutches shown, one or two of them look like our wayward One Way Clutch. It's Suzuki so there might be a chance that they are using a supplier that makes a Sprag Clutch that would be what we are looking for. I'll keep tryin'. CW
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Post by rpr851r on Apr 15, 2020 18:06:18 GMT -5
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Post by timpa136 on Apr 24, 2020 15:16:28 GMT -5
I was somewhat hopeful when I saw the NSK Warner on the box and I found a Distributor in Michigan less than an hours drive from
my buddies. I figured that Jess, Charles and others had exhausted all possibilities but figured I would call the next day during business hours.
Well my calls went to a discontinued message and I wasn't too surprised. I'm posting this less than an hours of ebay closing.
and as the service bulletin states, the early design requires the new matching Clutch washer which was discontinued early.
Tim
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Post by jm0406 on Jul 17, 2020 9:38:13 GMT -5
I have not had the need to replace any on my Suzukis, but have had experience with sprag clutches on Nortons. There are quite a few companies that make these, not sure about that size, but would be worth an inquiry. Jeff
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Post by billybowwow on Feb 25, 2023 11:13:53 GMT -5
Does anyone have starter clutch gear. My gear broke in half, Thanks Bill
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Post by wayne on Feb 25, 2023 22:04:38 GMT -5
Send an email to JESS at rotaryrecycle@gmail.com
He'll have them for sure.
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t140v
3rd Gear
Posts: 422
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Post by t140v on Apr 21, 2023 10:20:47 GMT -5
A bit more info on the starter clutch if anybody is looking with alternative manf part numbers.
Sprag clutch Starter sprag clutch . Google X-134398 Size 49.720 x 66.383 x 19.10 Hesketh Part. No. 126-122 Renold Part. No. REGP 4972 (4C) Borg-Warner Part.No. BWX 1310003 Formspragg-Steiber Part. No. DC 4972 (4C) Ringspann Part. No. 3677.049.602.000000
Regards Stuart.
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