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Post by wpfleet on Jul 24, 2014 21:16:27 GMT -5
I just bought a sb50 it had not been run in 4 years as per the last owner but was running when parked. I got it home every thing was clean and worked starter, fuel vslve, auto bystarter (choke), and oil pump. So I put a small amount of gas in the tank which had hardly no rust in it upon visual inspection. Turned the key on kicked it twice and it started up nicely and ran great. A week later it started back firing or popping and had little power and now it won't start I have fuel, fire, compression with a no start condition, using kick starter or electric starter. I even tried using starting fluid to get it running with no success. As far as I can tell there is no suction at the carb inlet. The carb has been cleaned, oil injector does work according to oil level in resivoir, reeds are good, new intake gaskets, new standard spark plug (bpr6hsa - ngk) and 140 psi compression. What am I missing here
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Post by Rebel on Jul 25, 2014 0:59:53 GMT -5
Any way the timing has gone off?
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Post by wpfleet on Jul 25, 2014 8:23:17 GMT -5
Checked and timing seems to be right
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Jul 25, 2014 15:28:08 GMT -5
Reeds did you check them
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Post by Rebel on Jul 25, 2014 16:10:14 GMT -5
He posted they were good. |
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Post by wpfleet on Jul 25, 2014 18:05:32 GMT -5
Could someone verify my check of the timing. Piston at top dead center with the mark on the flywheel aligned with mark on crank case. I'm assuming this means that the flywheel key is ok
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Jul 25, 2014 21:59:41 GMT -5
Normally a no suck is reeds it could be a blown crank seal or bad base gasket
Not sure about the timing marks on a Honda
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Post by wpfleet on Jul 26, 2014 17:36:06 GMT -5
When I take reed assembly out are reeds supposed to be flat and closed or slightly open
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Post by Rebel on Jul 26, 2014 18:08:03 GMT -5
does it look like this?  any chipping on the reeds at all? |
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Post by Rebel on Jul 26, 2014 18:14:37 GMT -5
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Jul 26, 2014 18:39:59 GMT -5
They should be sealed tight any chips is bad any gap means they aren't closing
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Post by wpfleet on Jul 26, 2014 19:33:50 GMT -5
I downloaded the manual. Pics of reed valve aren't too clear. My reed valve is flat no chips or deterioration. At the point now where I'm thinking break it completely down and get new seals and gaskets all way around. That way I know I fixed the problem. Any one know if I can still get seals for a 88 sb50. I found a site in london with parts but they don't have seals and don't have most gaskets.
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Post by wpfleet on Jul 26, 2014 20:17:23 GMT -5
I downloaded the manual. Pics of reed valve aren't too clear. My reed valve is flat no chips or deterioration. At the point now where I'm thinking break it completely down and get new seals and gaskets all way around. That way I know I fixed the problem. Any one know if I can still get seals for a 88 sb50.
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Post by Rebel on Jul 27, 2014 0:11:07 GMT -5
It might be a bit hard to find seals for a motor that old but Honda may just be using the same parts on something else today. Give your local Honda dealer a call and ask them or go to one of the online motorcycle parts dealers that sell Honda parts and see if they offer them.
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jmkjr72
contributing staff
Commander 132nd Northern Cav. Division
Posts: 2,779
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Post by jmkjr72 on Jul 27, 2014 8:42:45 GMT -5
Cheap cy lye parts a multitle oem dealer lists the oils seals but no gaskets gaskets you may have to make your own or use yamabond or something along tha t lines to seal the cases
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CAN YOU HELP ME OUT MAN,AS i LOST ME JOB DUE TO NOT BEING ABLE TO GET THERE?ANY INF