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Discussion Starter · #1 ·
Hey everyone.



Just got a 1980 CX500 Custom today and am looking for a good source for a carb rebuild kits for it. I've had some luck online finding a couple places (Carb Kit capital and Murph's Kits) for 78-79 CX500's but nothing specific for an 80. Would the 78-79 kit work?



Any insight you guys can give is greatly appreciated.





~Mike
 

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The 78-79 and 80-on kits are slightly different. The ball on the air cutoffs is extended further on one.


A good place to get a whole kit would be.



http://www.randakks.com/



But the website says they are on vacation at the moment.


Thanks for the quick responses Blindstitch. I saw the Randakks website during my search but since their vacation goes through mid August I didn't include it as an option above.



Do you (or anyone else reading this) know if the ball's different lengths on the air cutoff valves are the only difference? If that is the case I can get a 1980-specific air cut-off diaphragm set for the rebuild.



~Mike
 

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The 78-79 and 80-on kits are slightly different. The ball on the air cutoffs is extended further on one.


Stitch, do you or Larry know if those cut-offs are interchangeable despite their differences? I know the ball is extended further on one but it is also shaped differently, the flat surface on the ball on the extended one is longer(deeper) and might actually cover the same area as the middle of the shorter style ball.



The reason I am asking is because if there is enough of a difference that one will not work properly in place of the other, it is something to keep in mind when troubleshooting these carbs, it is very possible that someone somewhere has put the wrong one(s) in a set of carbs over the years and it is not anything I have ever heard suggested anyone check when diagnosing a tricky carb problem.



Also, which one is out of the 78-79 models and which is from the later ones?



edit; after thinking about this a bit more, I think the only problem if these were mixed up would be that the air cut-off might not work properly, you may get some popping on decel if the ball did not close the air passage,, it would not be much different than by-passing the ACV's ,,, as long as the longer shaft did not keep the cover from seating properly.
 

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Though the carb kits come with all the jets and needles, you won't need all that extra stuff. I haven't found the replacement hard parts to be anywhere near the stock OEM parts. I don't suggest using them. But if you can get the kits in Phil's link that's a good deal. Just don't use their needles and needle jets.



If you want to get the parts separately try these links. ACV Valves Accelerator pump Bowl gaskets Most of the time you can reuse yours with no problems.

If your going to split the carb's, I would suggest new fuel cross over )-rings, as well as the new mixture screw )-rings. I have them available in Viton rubber. They are much better quality than what you'll get in any kit.

In case you don't know already, the low jets need to be pulled and cleaned manually with a .018 drill bit to get the carb's back to perfect running condition. This link describes the process Cleaning If you need a full step by step guide, I have a book on rebuilding these carbs available. Look in my signature and you'll find an active link there for it. It takes you through my whole process on how to rebuild these carbs with the confidence that there done right.

Almost forgot the rubber plugs for the low chamber. Rubber plugs

Larry
 

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'84 CX650E that is evolving into a GL500
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If you can, I would recommend waiting for Randall to return. The Randakks kits are made from the best materials (can you say "exotic rubber"?) and some have parts that you can't get anywhere else (like the aluminum "pucks" in the GL1000 kits).



Randall was a good friend of Dick in Raleigh (Charles' Dad) and was a member and occasional poster on the previous forum. I know him from several other forums (including Naked GoldWings). He is a GoldWing restorer and carb specialist who found he couldn't get the quality of parts he required for his own restorations so he started having them made for him and selling the kits to the rest of us.



He stands by what he sells too - he once sent me free replacement parts because he suspected that they might cause a problem at some time in the future. You won't find that attitude in many places these days.
 

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not to bring a thread back to life for no reason. But I am about to rebuild my carbs with larys book. Would randakk's carb kit "b" be the one I need for an 81 CX500C. I don't want to drop 90 dollars on the wrong product. also what are the rubber plugs for?
 

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not to bring a thread back to life for no reason. But I am about to rebuild my carbs with larys book. Would randakk's carb kit "b" be the one I need for an 81 CX500C. I don't want to drop 90 dollars on the wrong product. also what are the rubber plugs for?


I bought that very kit and have the same model bike. Worked great. There is a rubber plug that covers the slow speed jet.
 

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Does Larry's book tell you what parts to get if you were to buy them individually? and would that be cheaper than Randakk's site? One more, should I push the carbs off to the end if I am rebuilding a bit?



Thanks!
 

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I've just gone to buy some ACVs and other carb bits from my usual source, Sirius consolidated only to find their online store appears to be closed and they now only have their ebay store.



I further notice the ebay store doesn't have the 500 ACVs, which they used to carry both variations.



Bugger, I had an account with them which made ordering simple.



Now I'd have to arrange combined shipping of numerous purchases. Too much bovine cakes.



I think they've just lost a customer.



Now.... who do you fellers think I should go to?
 

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I've just gone to buy some ACVs and other carb bits from my usual source, Sirius consolidated only to find their online store appears to be closed and they now only have their ebay store.



I further notice the ebay store doesn't have the 500 ACVs, which they used to carry both variations.



Bugger, I had an account with them which made ordering simple.



Now I'd have to arrange combined shipping of numerous purchases. Too much bovine cakes.



I think they've just lost a customer.



Now.... who do you fellers think I should go to?
cmsl are pretty good mark,as is david silvers

http://www.cmsnl.com/honda-cx500b-1981-australia_model16485/partslist/E22.html#results



http://www.davidsilverspares.co.uk/

 

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I've just gone to buy some ACVs and other carb bits from my usual source, Sirius consolidated only to find their online store appears to be closed and they now only have their ebay store.



I further notice the ebay store doesn't have the 500 ACVs, which they used to carry both variations.



Bugger, I had an account with them which made ordering simple.



Now I'd have to arrange combined shipping of numerous purchases. Too much bovine cakes.



I think they've just lost a customer.



Now.... who do you fellers think I should go to?
This place?
 

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Thanks Bandit. That first links prices are astronomical so I'll just skip girlishly past that one.



I've saved the David Silvers link to favourites for future reference. DS are great but a lot of the Australians complain about paying top dollar for shipping and then the item takes weeks to arrive.



Guess I should have a look at Wemoto too.



I'll have another look at Larrys links further up the page too. They wouldn't open for me before so I thought they must have been dead links. Now I think it's my internet.
 

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Reckon that's the one, - it times out. Same as it does on my favourites bar.


Seems fine from here,,,try woofing some cookies and clearing your cache?
 

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