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  #41  
Old 4 Weeks Ago
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Ireeman Ireeman is offline
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Quote:
Originally Posted by Toejam503 View Post
Put the valve into a cordless drill and spin it, while holding sandpaper or scotchbrite, to clean off carbon build up.
Barbarian...use lapping compound.
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  #42  
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Hornsmith Hornsmith is offline
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Fascinating find, not sure what it means if anything. I tested the compression earlier, thought it was fine at about 195. I have the battery removed and the rear wheel raised, but I wanted to do some more investigating. I put the gauge in and turned it over by hand. Obviously this isn't as good as doing it on the starter, but I just wanted to do a quick test. It was lower, like 150, but again, I had the throttle closed and when moving it by hand it's much slower so some air probably escaped resulting in the lower number. I then removed the compression tester put a wee bit of engine oil in the spark plug hole. Put the tester back on it and spun the wheel. I expected/hoped that it would be around the same, but it was actually lower! And not just a bit lower, like 140 or even 100. It was like 25 psi, and I don't even know what to think about that. I did it multiple times and it always went to 25 psi. Bizarre. I'll try it again in the morning with a battery in it using starter, and see what happens I guess. I got no freakin clue. Anyone else have any idea what sort of thing is going on?
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  #43  
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Which way did you rotate wheel?
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  #44  
Old 4 Weeks Ago
Hornsmith Hornsmith is offline
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The direction of travel as if the bike was moving forwards. Very good question XD I just might do it again to make sure

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  #45  
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Well, in my frustration and late night energy, I decided to remove the head and inspect everything down there. I'm getting pretty darn good at it, so it only took my like 20 minutes to do it, which involved ratcheting the frame up to take stress off the front mount to get that out so I could lower the front of the engine within the frame to get the head out. Valves looked the same as before, and I checked the rods and rockers and all. All looks good. I didn't bother removing the piston, but poured some oil on it to see if its sealing at all, and sure enough the oil stayed put. I'm gonna wait for that oil to seep down and then put it all back together. Sadly, when I removed the head on of the pushrod cover gaskets/o-rings decided to go flying across the room and I have no clue where it went. I have new gaskets already for the rest of it, because the kit I got was designed for a twin and I only needed half of them, but I don't have replacement gaskets for the pushrod covers, and it needs two of them. Can I just use any old gasket? I've got a bunch of o-rings in the right size, but they're not designed for engine use, and I wouldn't want them breaking down in the heat and leaking oil everywhere.
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Bruce Clarke Bruce Clarke is offline
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I'd advise you go to an auto parts store and buy a couple O rings that are the correct size, most places will charge a few cents for one if they charge at all.
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  #47  
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Yeah, I ended up doing that. Also I think I might have an idea why the tester was wack on compression. There was a bit of oil around the plug hole and I bet it messed with the seal.

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  #48  
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Well, I found out why it wasn't starting. The spark plug was bad. When testing it, the end of the plug would spark to a nearby ground, but no spark could happen where it's supposed to, between the gap. It just would smoke in the front. Spooky. Anyway, I put in the old plug that had probably been sitting in the bike for 10 years, and it starts up fine with that.
The engine runs fine for a few minutes and then totally dies, and can't be started again unless I wait for about an hour. Then it'll fire up and run and then die and then won't start unless I wait for an hour. I'm thinking it's something with the fuel, either it's getting way too much fuel and flooding or fuel isn't getting into the carb fast enough. But I'm not sure, we'll see.
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  #49  
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Parts that sit clog. As a pic from one of my threads will show you





Whole fuel delivery section probably needs cleaning.
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  #50  
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Oh joy that looks real nice XD. I'll definitely check that out. I just cleaned the float bowl and jets and all that looks real good now but I have not opened up the accelerator pump. I will definitely look in there.
Additionally I just added a filter, which not only filters the fuel but lets me see whether or not fuel is flowing. I put a bunch more in the tank and I got it keep going for several minutes. I also shortened the rod to the accelerator pump and it's much better now. After letting it idle for a bit until it was warmer I took off the choke and it settled down to a good speed. Adjusted the idle but found out that the idle screw doesn't quite match up with the part of the throttle it's supposed to butt up against. Added a nut to the end of the screw and now it works good. When I pumped the throttle it died almost immediately, which was odd because that hadn't been a problem earlier. Then I noticed that the plug I put over voes nozzle wasn't there! It must have shot off when it backfired last night. Gonna put another one on it that's a bit tighter fit.
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