Venus 50 (Now 96cc!)

[90GTVert]

I took my throttle assembly and carb off and stuck everything on the work bench to make getting the cable right easier. I took my time measuring up exactly what length I would need before I cut anything. Made a much better cut on the brass tube with the tubing cutter and did a little more neat job of soldering. Everything looks like it's just right! With no slack taken out at the handlebar adjuster, the slide sits all the way at the bottom of it's path. With the throttle open, it will pull the throttle valve as far as it can go.



Now the stupid part. I don't think I even needed to do this. I had said I could either get it to a good idle position but not all the way up or all the way up but in a position for a high idle. Well, I must not have had my glasses on when I saw the throttle vavle clear the venturi. I installed the new cable, on the bench still, and tried adjusting it and I was still not clearing the opening with the slide. I took the cable out and put jus tthe slide in with nothing attached and screwed the top on. With the top all the way on, the slide can't actually clear. I'll have to see what I can do there. I don't really wanna leave it partially unscrewed since there's an o-ring up there that wouldn't seat that way.

[190mech]

The RD guys carefully trim the top of the slide to get max throttle,but caution that too much will get the slide above the locating pin,leading to an exciting WFO ride!This is on Mikuni's,maybe a Dellorto has more meat up there...

[90GTVert]

That's actually what I was thinking. I was worried about it clearing the top of the passage when closed, never even thought about that locator. Thanks for the tip. I'll have to do some checking.

[stepthrutuner]

Just like I tell my Middle Eastern buddy.... "Build it better, Yousef."

[2strokd]

"you will get it Daniel son"

[90GTVert]

Does this mean I need to wear a gui and a turban when I work on it? I'm too fat for White Crane, so I do White Turkey.

[stepthrutuner]

Oct 29, 2010 13:11:57 GMT -5 90GTVert said:

Does this mean I need to wear a gui and a turban when I work on it? I'm too fat for White Crane, so I do White Turkey.

Wild Turkey sounds pretty good to me. It got down in the 30s last night and a couple of shots would have been good.

[90GTVert]

Wild Turkey is sounding good to me right now too... and I never drink.

I worked the top of the slide with glass and sandpaper till it cleared, checking to be sure it still had room left without leaving the locator multiple times along the way. Got it all set up and went to fire it up. Nothing. Pulled the plug. It's sparking, but it's fouled. After messing around with filter on and filter off and enrichener on and off and changing the mixture screw around I decided to put fresh gas in to be sure what was in the tank was still good. Figured it should be, but just wasn't 100% sure. Still nothing. I can get it to fire with propane (no carb cleaner or starting fluid around), but that's very brief. I tried leaving the tank in there while I started it, but it tried to take off when it started. I used my hand as a choke and got it to start once. Cleared out a bunch of smoke then died when I tried to let it idle for a second. Tried to fire it up a few more times, said ___ it, and walked back in. I used to like DellOrtos... or I still do likethe big suckers. I literally installed them and fired them up in both cases. In one instace, the main jet was even spot on. Kinda what I hoped for when I got this one. Oh well, someday it will run... I hope. Just don't have the patience for it right now with other stuff going on.

[190mech]

Sounds like trash in the carb or float level...

[90GTVert]

I went out and pulled the plug to see how it looked before I did anything. It has been sitting with the manual petcock turned off. The plug was damp. I cleaned it off and dried it. I let the engine sit with the plug out while I removed and checked the carb. I cleaned the carb thoroughly. There was some fine black debris on the float needle that I cleaned off. I stuck it back together and blew air through to make sure the float needle and seat weren't leaking. Before I stuck the carb on, I went over and stuck the spark plug back in loose and kicked the engine over a couple of times. The plug came out wet. I cleaned the plug off again, blew air into the cylinder, and dried the threads . Stuck the plug back in and repeated. Wet again. I blew air in through the cylinder and intake while kicking the engine over numerous times, then stuck the piston at BDC. I'm gonna let it sit like that for a while and maybe it'll clear out some.

[2strokd]

Good idea. Maybe the case is full of fuel? I did that
on my sled once and it was hell getting it all cleared up!

[90GTVert]

I went out a few hours after my last post and it started on the 3rd kick. Nice. I let it run for a minute, then shut it down.

I went out later after it cooled off completely and it didn't wanna start again. Wet spark plug. I ended up getting it started by putting my hand over the inlet of the carb to choke it while holding the throttle wide open. It chugged out smoke for a few, then I had to set the manual enricher on to keep it running. After it warmed up for about 10 minutes, I adjusted the idle mixture and idle speed. The idle mixture wasn't very responsive.

I took it out in the yard and the first time I hit the gas it slid almost out from under me. I'm used to the SunL where you could "floor it" and nothing was really gonna happen. lol The grass was wet so it just spun and occasionally caught to try and throw me off another way. lol I put it up for the night. It was obvious I wasn't gonna learn anything about the tune by fighting to stay on the scoot.

I went out this morning and it didn't wanna start again. Got it started the same way as last time. Warmed up, tried to adjst the idle. Again, very unresponsive. I pulled the plug, swapped in a new one, fired it up to take a test trip. It was 40 degrees and winds are about 20MPH today. Not exactly good for tuning. The wind is head on in my little 1/8ish mile test strip leaving, and of course at my back on the way home. Leaving I managed 45MPH letting on and off the throttle a little at first against the strong winds. lol I forgot how much beef this thing has. On the way back I was up to 55MPH when I killed it a little early. Judging from how it pulled against the wind, I'd say it's gotta be in the right neighborhood with the 92 main jet. The plug was caramel colored after that 1/4 mile or so.

Going to WOT there is hesitation. I'll need to mess with the needle. My main concern at this point is what's up with the hard starts. I think I might need an even smaller pilot than the 35.

[2strokd]

Sounds like your getting there! I was starting to wonder if your carb was "bad" or had a piece of metal stuck in a port from the factory??? Yeah, try a smaller main.

[190mech]

Could be the choke enrichening orfice is a bit small(my VM22 was) making it lean,but youre getting a wet plug??Sounds like the pilot jet is off too..

[90GTVert]

I went out and fired it up today and it was fine. Had to use the choke to start it. Too little fuel in the midrange. Can't tell on top for sure. The midrange is solean at one pint that it will die if I hold it at that position. Does it with the needle set all the way rich or in the middle. I'm gonna mark my throttle so I can tell what position I'm at and what is going on better before I change anything. Just haven't spent much time on it. Yesterday morning I spent most of my time getting the tail light on so I could be a little safer on the street test runs. Got tied up in the afternoon/evening and never got to work on it anymore. Today I spent half the time I could be out there with a multimeter trying to figure out why the brake light is on all the time. I figured I had probably done something wrong so I wasted time checking different stuff out when it was just a problem with a brake lever switch that happened to pop up when I installed a new light. I have the best timing. lol

The good news is that I dig the new light. I'll get a pic as long as I remember once I get all the panels on eventually. It's as bright as the stock light at least and when I don't have my side panels on for test runs it's nice to know I have working rear turn signals built in. ;D