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Post by ilovenxstage on Jun 22, 2013 20:43:20 GMT -5
I'm working on getting my '81 Honda NC50 running good. One of the problems I'm having is the exhaust seems to be clogged, probably with carbon buildup after 32 years of being run with crappy quality oil. Is there any way to get rid of that buildup without cutting open the exhaust and re welding it, or should I just put on a new exhaust?
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Post by mileage on Jun 22, 2013 21:44:37 GMT -5
lye dipping. make sure its all steel. metal. iron. dip it in a small container that will cover over it. fill extra space with bricks. leave it like 6 hours or 8 lift it after an hour, dump gunk out. let it sit. lye desitigrates bodies.
use bricks to fill up extra water space. put lye in the bucket, exhaust fill up rest with water. wear, stuff, covers and stuff.
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Post by frederick on Jun 23, 2013 22:22:14 GMT -5
Easiest to change the exhaust. Lye works too. Also you could build a big ole bonfire ,let it coal up and throw your exhaust in it and let bake till its red hot. That will burn up the gunk. I seen a guy use a cutting torch to heat up a exhaust to red hot and then blow oxygen thru it,but one would have to be very carefull not to melt the exhaust using that method.
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Post by scooternewby on Jun 24, 2013 0:24:27 GMT -5
Or melt their hands and faces!!
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Post by scootnwinn on Jun 24, 2013 1:09:48 GMT -5
Why not just replace it with a nice performance pipe?
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Post by prodigit on Jun 24, 2013 1:35:09 GMT -5
Inject it with seafoam or Chemtool B12.
Just pour a cup of it in the exhaust pipe, and close off the ends, shake it somewhat, for the liquid to spread. Leave it there for at least 1,5 to 2 hours (as long as it's still wet inside), then flush it with a water hose; mount it and start riding.
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Post by domindart on Jun 24, 2013 11:32:25 GMT -5
Yeah, I think I would just replace with a performance exhaust  |
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Post by ilovenxstage on Jun 24, 2013 20:22:20 GMT -5
I'd like to put a performance exhaust on it, but I can't find one that fits the NC50.
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Post by prodigit on Jun 24, 2013 21:27:03 GMT -5
Just saw off the muffler part, and mount the performance exhaust over the stock exhaust pipe
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Post by jerseyboy on Jun 25, 2013 7:35:55 GMT -5
Dont forget if you do that exhaust upgrade,,do the intake also,,and UP JET the carb to the proper jet,,cause it will run too lean with all that air in/out...the motor will benefit by breathing better,,running cooler,more efficient,more power,,and of coarse that throaty growl that we all love so much |
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Post by gitsum on Jul 6, 2013 11:15:07 GMT -5
If you mod your engine to produce more horsepower, it's gonna produce more heat, that's physics.
While the engine may be more efficient at making power, it will run hotter unless you can upgrade the cooling.
Most of the time a stock scooter/motorcycle engine is tuned almost too lean just to pass emissions. Lean conditions cause a hotter running engine, especially on a two-stroke.
Re-jetting the carb properly after some minor engine upgrades can improve/correct the fuel ratio so that the engine actually runs cooler than the stock configuration. That being said, if you correct the stock lean conditions without engine mods, it will run even cooler.
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