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Post by blackbag on Jun 18, 2014 22:27:03 GMT -5
Still no go with original pilot and new  main. Cranks over like crazy but not starting. I even pulled the plug out and tested it against the engine again to ensure spark and its definitely sparking. Any recommendations on a plug & play carb? Also, just to double check does not having the uni filter on make any difference? I never had a problem getting it to start without in on the old engine so just wanted to check. Frustrated! Blackbag |
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Post by blackbag on Jun 18, 2014 19:55:21 GMT -5
Perfect thanks alleyoop I'll tear em apart and swap em and let you know how it went. |
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Post by blackbag on Jun 18, 2014 15:50:26 GMT -5
alleyoop Do you know what stock is on a 50? I put an main on my original carb and just wondering if swapping the main and the pilot off the original would be better? BTW "You people" don't believe dumping a ton of gas in will make it run better. It's become very clear to me that carbs with these mods is a delicate balance of getting the right amount of air and gas into the engine. I'm just trying to make what I was sold work.
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Post by blackbag on Jun 18, 2014 15:06:32 GMT -5
Just realized I joined here a couple weeks ago and didn't give a proper introduction so here it is.
My name is Adam and I live in the San Francisco bay area. I'm a single father with a daughter who is 16. I work in the technology world as a digital media engineer. I'm a major geek but I'm not afraid to get good and greasy from working on autos. This is my first experience with 2 wheeled vehicles so it definitely has been a learning experience. I bought a cheap Geely for my daughter for her 16th birthday and figured it would be a good project for us. She likes helping out and doesn't mind a little grease either. I figure by the time we are done this thing will pretty much be a brand new scooter but on the positive end we will know how to fix it when it breaks down the road. How did I become known as blackbag? I lost a 17 year old daughter 2 years ago in a house fire and after that happened I discovered peace through fishing. When I first started all I had was a small black bag with a few bass lures and a rod and reel. Hence the name blackbag.
Thanks for having me,
Blackbag
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Post by blackbag on Jun 18, 2014 14:42:42 GMT -5
Oh I should add, intake at .003 and ex .004. I have spark, checked it against engine.
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Post by blackbag on Jun 18, 2014 14:37:36 GMT -5
Ok guys need help. Here's my current setup.
139QMB 50 with...
52mm Cylinder (looks to be the same scrappy sells but I bought it brand new on craigslist for $25)
scrappy performance head with the large valves
red hot coil
Orange CDI
220 CCA Duralast AGM battery
Scrappy high torque starter
24MM Carb that came with performance head
150 intake
So my issue is it just cranks and cranks but won't start. I pull the plug and I'm flooded half the time. Anyone with experience with the 24mm carbs? I think they are just basically the stock 150 carbs with a 105main and not sure on pilot I think 35?
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Post by blackbag on Jun 16, 2014 16:37:03 GMT -5
By the way, you won't ever find a true 100CC BBK for a 50CC engine. About the biggest I've seen so far as a bolt in is 83CC. At 54mm (90CC) You'd have to bore out your case.
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Post by blackbag on Jun 16, 2014 16:22:24 GMT -5
google 1e40QMB Big Bore Kit plenty of kits out there
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Post by blackbag on Jun 16, 2014 14:59:31 GMT -5
Don't believe what they say on the box. They say ready to go with no charge needed. I bought a 220CCA and when I converted to the 83CC BBK It still didn't have the power to crank even after rewiring to thicker gauge wires. Charged it on a trickle for a few hours and it cranked the 83 over no problem.
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Post by blackbag on Jun 16, 2014 12:41:46 GMT -5
I had the same exact issue. Literally built the whole 83CC kit this weekend with the new carb but throttle cable wasn't long enough so I went back to old carb and could not get it to start. Tore the whole thing down and went back to old head and cylinder but with new cam, CDI, coil but STILL no start. Just cranks and cranks. Then I figured what the I've tried everything (vaccum, gas pumping out of the tube, valves, etc.) Put the new carb on and boom started right up! So obviously my issue is the old carb. Now I've got to tear the whole thing back down again and put the new head and cylinder in and try again with new carb.
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Post by blackbag on Jun 14, 2014 1:01:46 GMT -5
Head stood up to the light leak test. Put a super bright 500 lumen light on the ports in a pitch black room and no light coming through the valves! Thanks millsc I'll downjet if needed. |
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Post by blackbag on Jun 13, 2014 19:00:21 GMT -5
millsc what size main did you run in your carb for the 52mm? This one has a 105 which I'm worried might be a bit too large.
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Post by blackbag on Jun 13, 2014 18:08:31 GMT -5
FYI, for anyone that is thinking about buying the scrappy head make sure you have gaskets. The order didn't come with one but luckily I had just ordered the full engine gasket kit from them last month.
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Post by blackbag on Jun 13, 2014 17:53:57 GMT -5
Just measured them. They are exactly 21 and 17.
I'm looking forward to getting this all together. A9 Cam, Big valve head, big carb, and intake. I think I'm good to go. Hopefully I'll be able to kick it over on e-start. If not I'll probably rip what's left of my hair out. LOL
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Post by blackbag on Jun 13, 2014 17:24:10 GMT -5
sorry still editing the post. Now you should see all the pics buford1488 |
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main. Cranks over like crazy but not starting. I even pulled the plug out and tested it against the engine again to ensure spark and its definitely sparking. Any recommendations on a plug & play carb?