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Post by 90GTVert on May 13, 2013 8:28:31 GMT -5
I don't usually check air gaps either, till something starts acting up. .28mm would be good.
From what I've seen soldering on ends, if they hold the first few times I pull the throttle wide open, they usually last.
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Post by oldgeek on May 13, 2013 18:02:41 GMT -5
I don't usually check air gaps either, till something starts acting up. .28mm would be good. From what I've seen soldering on ends, if they hold the first few times I pull the throttle wide open, they usually last. Brent, Do you solder them on with just plain old 60/40 solder? Just keep riding, Scott |
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Post by 190mech on May 13, 2013 19:43:22 GMT -5
Plain old 60/40 with acid flux works well,big soldering iron or small butane torch for heat..  |
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Post by oldgeek on Sept 8, 2013 19:31:52 GMT -5
Time to bump this thread! We have been having a great summer riding whenever we get a chance. The wife LOVES her 250 Nighthawk, it has been flawless for her. My 70cc has also been doing fine. Work is slowing down a bit, so its time to get the 21mm Dellorto PHBG I ordered a while back installed. Plus the end of the throttle cable broke again, so I decided to fix it all....yeah...right! For me, it has been much easier said than done. the carb fits the reed valve intake ok, but the filter side has been a pita. The carb came with the large filter intake which I have decided is useless for me. I ordered the 38mm? adapter I saw, and its also a little to big for the stock airbox tube. I then realized there is a 36mm adapter, so I have ordered it and am waiting for it to arrive. I think that it will seal up just right to the stock airbox tube that I have connected to the Kart style airbox. I love the sound I get using the kart style airbox! The throttle cable connection to the carb has also been hell trying to attach. I could not get the carb end of the cable to go through the 90 degree cable thingy I bought with the carb. I even tried to straighten it out a bit but the dam cable would not go through. I finally drilled the threads out of the top of the carb, and used the 90 degree tube from the stock carb...problem solved. I got the airbox hooked up good enough for testing, then I hooked up the fuel line, and then the petcock vacuum line...what??? Where the hell is the fitting for the vacuum line??? There isn't one!  Damit, now I gotta find a fitting for the tank to eliminate the stupid vacuum petcock. Anyway I put vacuum on the line to open the petcock and let the bowl fill up. She fired right up with the choke on, and seemed to run ok as long as it had gas in the bowl. I am using Corrosions set up for inital jetting (thanks,Corrosion) and I will resume setup when I get the petcock issue straightened out. Just Keep Riding Scott |
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Post by 90GTVert on Sept 9, 2013 15:16:23 GMT -5
I know it feels slow or like a constant problem, but it'll be a nice setup once you get it all worked out.
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Post by oldgeek on Oct 3, 2013 21:47:45 GMT -5
Well its been almost a month without having the 70cc to ride. I have been riding the bone stock red RX8, and its just not as much fun.LoL! Ive had a bunch of krap going on around here. Monday Last week I was with a good friend of mine when he had a heart attack. He is ok, and already back to work after they placed 2 stints (he is just 44!) But just before my friend had his heart attack my wifes primary ride a 95 isuzu rodeo blew its head gasket, I think it is down for the count cause I think it would be a waste to do just the head gasket on a motor with 188000 on it. And then my secondary ride, a 94 geo tracker broke down. The clutch lever arm on the transmission broke. While I was waiting for a lever for the tracker to arrive from feebay, I borrowed my dads car, and my wife clipped my work van with it when she pulled into the driveway. Not too bad but damm I need a break! Enough of the whining for now! A couple weeks ago I was able to finally do away with the stupid vacuum fuel petcock, and tried to tune the dellorto up, but I had so much of what I will call bog that it was un rideable. Then I got busy with all of the other stuff I mentioned above and have not touched it since. Its fall Harley ralley week here in Myrtle Beach, and tonight I decided to try again to get the 70cc working with the dellorto carb. I changed the 48 pilot jet to a 60 basicly because that is the only other one I had, and changed the main jet from a 92 to a 96. I fired it up and to my suprise it bogged even worse than before!  In desperation/aggrevation I snatched the kart style air box off, and the damm scooter came to life with a vengance! I set the air screw about 1/2 turn out from all the way in and took off! I rode all over for about an hour and a half, and it seemed to be tuned pretty good. The Harley riders got a kick out of it I am guessing by their looks at me. The scooter is pretty loud with no filter at all. I guess the kart style airbox was not breathing as well as I thought it was. I gotta get a uni filter, or something on the intake, because I know its stupid to run without anything at all. GPS said 49 mph when I checked it after the ride, but I held back while I was riding because I couldn't see the tach, so I know it has a bit more in it put out. I need to do a plug chop before I push it much harder. Also the mods I have done so far to the fixed half of the variator pulley have really helped with the launch, I should be able to get everything working much better this time around. I was able to get the variator pulley chucked up in my vsr drill, and I used a scraper type blade to shave the center of the pulley down, sort of like a crude lathe.(learned that from another one of Brents tutorials) It sometimes amazes me how slow a project can move, then you make so much progress in a single day. Just Keep Riding. Scotty |
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Post by moofus02 on Oct 3, 2013 22:27:48 GMT -5
Glad to hear it's getting there sorry about the other set backs like dad always said if it's got teets or wheels it's bound to cause you trouble lol never stops us just slows us down
Sent from my SPH-L720 using proboards
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Post by 90GTVert on Oct 4, 2013 6:57:03 GMT -5
Usually those Dells have too large of a pilot for an airbox, at least a stock one. Usually end up in the 30s with a stock airbox, snorkel removed.
Def check up on the jetting. You don't need any more problems from the sound of it. Hope your luck turns around.
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Post by oldgeek on Oct 4, 2013 18:00:56 GMT -5
Usually those Dells have too large of a pilot for an airbox, at least a stock one. Usually end up in the 30s with a stock airbox, snorkel removed. Def check up on the jetting. You don't need any more problems from the sound of it. Hope your luck turns around. I don't have any of the right jets yet, but I got to thinking how well it was running last night without any airbox at all, and I really want to ride it some this weekend, but not without some kind of filter! So I went looking for a filter locally at a auto parts shop or 2 and came up with nothing. Then it occurred to me that a small engine shop should have something that will work temporarily. I went to the one uptown, and they kindly escorted me to the "filter area" and let me loose. I had all three inlet adapters for the dell with me, and found a great setup that I think is perfect if you are looking for a free-flow setup. I gladly paid him $10.00 for the filter because it gets me on the road this weekend, but I see the same filter on feebay (clone) for much cheaper. Overall It is a little louder than the kart style air box, but the pipe is already loud anyway. I put about 3 wraps of black electrical tape around the 38mm inlet adapter to help it seal just a tad better, and 2 more strips to cover the hole on the other side, that's it. I rode it a good bit today with no problems at all. The filter is light enough that it easily stays in place. I need to get a slightly smaller pilot jet so i can back the air screw out some because for now its less than half a turn out. I probably need to go up to a 97 or 98 main jet, but I wont know until I get around to a plug chop.    |
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Post by 90GTVert on Oct 4, 2013 20:15:43 GMT -5
That's a new one to me. Nice find.
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Post by Corrosion on Oct 5, 2013 13:59:15 GMT -5
Kinda missing the action here few weeks. Its Emission testing time @ work, And been under the Gun, to get the Generators to pass The 2014 standards.
I have 5 vents in my air box from the previous owner. I also am running a 50 degree slide. So that is why I have a larger than normal, Pilot.
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Post by aeroxbud on Oct 5, 2013 17:48:28 GMT -5
Would of never thought of using a filter like that  |
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Post by oldgeek on Oct 31, 2013 16:03:35 GMT -5
Some parts I ordered came in today, so I made a few changes I have been wanting to try out.
I changed out the 50 slide in the 21mm Dellorto, and put in a 40 which should run RICHER from just off idle to about 1/2 throttle if my research is correct. The jets I ordered did not come in yet, so I will have to wait until they do before I can play with jetting.
I also changed out the 1500 contra spring to a 1200 I picked up from autotech355. The 1200 spring is a short type, and The 1500 is a long one. The 1500 is just too much in conjunction with the ball bearing torsion base I have been using, as the torsion base makes the setup even stiffer due to its thickness I think, so I hope the 1200 will work better with my setup.
I installed a new belt Monday because after I shaved the fixed side of the variator pulley even further, the belt started slipping just a bit. The old belt had worn to 16.25mm wide, the new one measured 17.40mm. Its amazing what a difference a mm or so can make! The new belt totally changed the CVT action. Top speed dropped almost 5MPH, and the launch was definitely slower.
My test ride after installing the 1200 contra spring, and the 40 throttle slide was a bit of a suprise. I almost wheelied coming out of the yard, and top speed was 52.97 @ 10500rpm, barely 1 mph slower than my fastest run so far. I had 4.5 gram sliders in the variator, so I think I will try a mix of 4 & 4.5 sliders next to see if I can get the top speed up just a little. Is it ever enough? LoL!
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Post by oldgeek on Oct 31, 2013 17:10:11 GMT -5
Happy Halloween night!
Working on the scooter, passing out a little candy.
Just got back from a ride with the mix of 4g & 4.5g sliders. Top speed was 52.54 just a tad slower, at the same 10500 rpm.
Next try is a mix of 4.5g & 5g sliders, they are the combination that worked best in the previous setup.
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Post by aeroxbud on Nov 1, 2013 5:53:13 GMT -5
Sometimes when you put a new belt on that replaces a really worn one, its like you have fitted heavier rollers! Some of those Kevlar belts are quite stiff too, till they wear in a little.
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