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Post by re5man on Nov 27, 2010 17:12:43 GMT -5
Ok,looks like I have the classic worn starter sprag clutch as Jess has stated in another post.The replacement starter clutch ,I put in is worse than the one on the bike,ie- starter bulks when trying to start engine and ends up spinning on it,s own.Getting quite an expert at removing/replacing starter clutches.I have 1 starter clutch left which I am currently fitting[3rd time lucky?]What I don,t understand is that Suzuki Service Bulletin RE-6 dated April 25 1975 states the one way clutch was modified to increase durability and the thrust washers outside diameter increased.The new style starter clutch and modified thrust washers installed on RE5,s on and after engine no. RE5-12054.My 2 slipping starter clutches are from engine no,s RE5-12490 and RE5-12751.The one I,m currently fitting is from an A model-eng. no. RE5-14872.All of them after the modification date.So I,m thinking they should all have the stronger starter clutch fitted already.Mileage on them is 12490 24000 approx. 12751 63000 approx. and the one I,m fitting 14872 24000 approx.Cheers,Shaun.  Anyone any comments? |
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Tonny
2nd Gear
Posts: 124
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Post by Tonny on Nov 28, 2010 3:11:41 GMT -5
I had the same problem and was told to try another gear oil. Sound crazy, but it worked.
When I bought the bike back in 2007 it didn't had the problem, but when I changed the oil to Castrol 20W/50 the starter was spinning over. Then I changed to Statoil ClassicWay 20W/50 on the gearbox, and have not had the problem since.
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Post by re5man on Nov 29, 2010 7:23:11 GMT -5
Thanks Tonny,interesting post as I AM running with Castrol XL 20/50 in the gearbox.Will try a different oil as you suggest.Cheers,Shaun.
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Post by ziggystardust on Nov 29, 2010 12:50:20 GMT -5
I don't have a problem with the starter clutch, I'm using Motul two stroke gearbox oil in both my RE5s.
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Tonny
2nd Gear
Posts: 124
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Post by Tonny on Dec 4, 2010 5:06:49 GMT -5
Let me hear about your experiences.
-Tonny
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Post by snowrench on Jan 30, 2011 14:19:39 GMT -5
I'd like to know the best course myself, as my Re5 has only 2700 miles on it, so I'm a bit suprised to find the starter clutch failing...even my old shovelheads did better than that.
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Post by Jess on Jan 30, 2011 15:57:12 GMT -5
Castrol GTX 20-50 can be used in the transmission. However, It is a very thick oil when cold, and does not flow well... The reason we say you can use it in the gearbox, is that you can, (Suzuki did) and it will work fine. It also makes it easy, as there is only one oil for the bike. I have suggested to many people over the years with starter clutch issues that they might try a different gear oil. ( I may have been the person who recommended to Tonny, I don't remember) Many many years ago, I had an re5 that would not start when cold. When it became warm, there was no issue. I had a small space heater (radiator type) that I would set near the bike for 15 minutes before riding. After the oil was warmed slightly, the bike would start immediately. After that I started experimenting with other transmission oils. I found that Bel-Ray 85 weight two stroke transmission oil worked the best for me. Understand, this will not fix a broken starter sprag. What it might do is help a worn one to work better... There is also the kick starter...  Just my 2 cents... Best, Jess |
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Post by re5man on Feb 1, 2011 15:35:37 GMT -5
Just about to replace the clutch cover after receiving my new gaskets from Jess.Taking Tonny,s advice and using Lee,s Motul two-stroke gearbox oil instead of Castrol XL20/50.Hoping this solves the slipping starter clutch! Cheers,Shaun.
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Post by re5man on Feb 22, 2011 6:17:39 GMT -5
Hi Tonny,starter clutch is now working fine with no slipping and spinning of the starter.Have been trying to sort out errattic tickover probs with heavy smoke and banging in the exhaust.Found some jets in the carb were blocked.All sorted now and rotary running good.Cheers,Shaun.
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Post by bdalameda on Oct 1, 2011 0:05:29 GMT -5
The slipping sprague type starter clutchs as used in the RE5 are used in other motorcycle engines as well. The reason that they slip with some lubricants and not others is that if you use an oil that has the Energy Conserving mark on it, the anti-friction additives in Energy Conserving oils will allow the clutch to slip. Many racing type oils do not have this additive as well as oils made for gearboxes as anti-friction additives play havoc with synchromesh transmissions. The Energy Conserving oils can also cause clutch chatter with wet clutches on some bikes.
Dan
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Anyone any comments?
