First Generation Ascots > The Thumper Years: Stock To Lightly Modified

Carb screw backed out?

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michiganadam:
Never had any problem with my ascot before. Took it for a ride today, and went to walmart and went in for a bit, came back out and screwed with the big plastic idle knob. That IS the idle knob, right? Lowered the idle a little too much, the bike backfired and died. Raised it back up and started it back up, and the bike would not stay running. Kept popping (much quieter) and trying to die at idle, but ran fine at high speed. Seemed a little lean but ran fine above 3000 rpm so i limped it home (one mile).....

got home and started messing with it, and saw that the popping was coming out of between the engine and the plastic intake manifold. The top screw is backed WAY out, theres a gap there (air leak), and theres a little gasket material sticking out.

Did i do something worse than what it seems? Looks like i can just pop a new gasket in and torque the screws down. Did i hurt it? :/

scottly:
Hey Adam, don't worry, you most likely didn't suffer any permanent damage. :) What sort of gasket material was sticking out? I've never had my manifold off, but an on-line parts schematic shows it is sealed with "O" rings, rather than a paper gasket. I would try tightening the loose manifold bolts back up first and see how the bike runs.     

michiganadam:
Ok, thanks for that! I didn't see a gasket and what i saw didnt look much like a gasket...figured it was a real thin paper gasket. I dont know what it is and it doesnt even neccessarily look like it came out of the sealing area. Could be flashing from the plastic molding process or black paint for all i know, honestly.

I will tighten it and see how it runs. It did have good power still..

michiganadam:
The o-ring is definitely what is sticking out.

How hard is it to change it and do you have the part number by any chance? :)

J6G1Z:
Here is a couple of links to Bike Bandit motorcycle parts.
http://www.bikebandit.com/houseofmotorcycles/1983-honda-ascot-500-ft500c/o/m151760#sch419923
http://www.bikebandit.com/houseofmotorcycles/1983-honda-ascot-500-ft500c-cylinder-head/o/m151760sch419923

I see that Bike Bandit is stating that the O-Ring is not available. You can probably find another O-Ring the same size or real close at any well stocked old fashioned hardware store like ACE. Sounds like you have a vacuum leak & are sucking air. You might try to take apart the section where the O-Ring is hanging out, inspect the O-Ring for any cuts or flattened spaces & if it looks OK, try to reuse it. You can also add a small amount of black RTV to the O-Ring. Just put a dab of RTV between your fingers & run the cleaned O-Ring between your fingers to apply a light coating.

What are you doing making carb, or any other engine adjustments, in some parking lot away from home? You want to try that stuff from the comfort of your home base, so you don't get stranded somewhere. The Ascot is not a very heavy bike, but pushing any bike home pretty much sucks.

Good luck
J.

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