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Post by scottish1 on May 15, 2011 20:58:52 GMT -5
i cleaned my carb.. due to some hesitation problems i've been having. at first it seems fine then i notice it will hesitate some but not as bad as before. so the carb cleaning may have helped, i don't think the jets were clogged but the holes are sooooo tiny that i'm sure it helped them to clean them out and break up the surface tension inside. wow bosco.. the dreaded nine mile bog down, i had that FOREVER.
i'm going to do an oil change pretty soon and i may as well re do the right side cover on my scoot which is a bear to do because it's a gy6-B motor not a standard gy6. my home made gasket didn't work out very well, lol. I had to order a new gasket from the q-link place, not a bad price but the shipping was a huge rip off price and it's not even gonna be here for a long time.
it seems like my scoot is broken in now with about 1300 miles on it. i had it up to about 60 mph on a nice road but that's not a speed that gives you a lot of confidence on a scooter. and of course the pressures of the motor performing like that really showed off my good gasket work, lol.
i tried a new spark plug to try and even out my hesitation problem. it even does it on the stand and at idle, pretty much all the way up the power band. runs like crap basically. but now and then it smooths out so i guess i should feel lucky the $%$ thing even runs. time for a new cdi for me too i think, i never did order a new one for a back up i think it would be a good idea now to see if it's giving my motor some crappy timing data.
one day soon i hope to stop posting on this problem because.. well it runs now. that's more than i can say for back at 700 miles on the odo. at this point i won't be happy until it runs perfect. that may be a lot to ask.
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Post by apittington on May 16, 2011 0:50:03 GMT -5
Since it seems like you have a new problem now, have you checked the plug? New carbs may come tuned enough to run out of the box, but running well is another questions. Warm up the scoot, ride it around in the throttle range it hesitates up to your house, and kill it with the kill switch while still moving/throttle held in that range, and check your plug color. If its tan its not a carb problem, if its dark/wet/sooty, your rich and flooding the engine when you give it gas. If its whiteish/crusty, your lean and are starving it of fuel and power. If it is hesitating off the line/at slow speed, your low speed needle/jet needs adjusting, if it hesitates over 1/3 throttle/at speed, its your main jet, which you can adjust with the needle on top of the carb, or by replacing the main jet. Your carb was set from the factory to run at their altitude and ambient air temp, to yours.
Adrian
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Post by sprocket on May 16, 2011 17:02:53 GMT -5
1300 miles time to set the valve gaps.. may smooth out the engine...
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Post by Premier Scooters on May 16, 2011 21:41:08 GMT -5
Since you said you were having trouble finding tdc. Here is how to properly adjust the valve gaps on the CF150 motors. remember the engine has to be cold Remove valve cover slowly, be careful not to let the little spring loaded oil channel fly out of the camshaft. To do this when you get the valve cover halfway over the oil channel you can compress it with a screwdriver. You need to find tdc of the compression stroke. Remove the little vent on you belt cover and rotate the crank. You are going to line the 2 bolts holding the timing gear to the cam with the top of the head. There is no hole on the cam gear to let you know you are on the compression stroke but both cam lobes will be facing down. Now look in the little inspection hole on you stator cover, you should see a little V lined up with the notch in the hole (shine a flashlight in there you will see it if you are at tdc). Set you intake valve to .05mm and your exhaust to .15 mm. In the service manual it has .15mm for the exhaust in one place and .20mm in another place. I've always done it at .15mm and haven't had any isuses.
Also you said you were overheating. have you tested your thermostat yet?
And you should def get the right gasket for your case cover. Oil leaks are bad.
Hope you get this worked out, they are great bikes, I've sold a bunch of the CF Motos and we have very little trouble with them.
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Post by scottish1 on May 18, 2011 1:16:26 GMT -5
valves are right on the money they held their last adjustment perfectly. spark plug looks a bit on the lean side so i upgraded to the next larger main jet. runs a lot smoother now i think the extremely tiny jets on the previous one were just too small. finally i am at the point where small tweaks are making a difference. can't wait to get my new gasket and re-do the right side casing.
now i can chop the rear fender and remount the license plate bracket so i have a racing style rear end. i commuted to work on it 3 days now and other than the occasional notice of some hesitation it seems to be able to go cross country a lot better. my commute is 20 miles one way so each day it gets a pretty good run. my friends at work always as me if i drove my 'hog' in to work. haahaaa!
there were days when i just hated this machine. nothing i could trade out was stopping it from bogging down after about 8 -10 miles and having to restart it then limp home stopping and restarting. now the entire, and i do mean entire ignition system is replaced as well as the carburetor and finally it seems to run. it's more fun to ride now that is for sure, but the memories of what it did still lurk and make me think that at any moment it's going to bog down and quit.
on my scooter there is no V on the flywheel. none. i know this because i had my right side cover off to replace the stator and the trigger pick up and i looked. and i looked again using a jeweler's loop to make sure i didn't miss anything. so the inspection port is of course useless but it's no big deal i am able to adjust the valves using the top cam stroke of one valve allowing me to adjust the other valve method.
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Post by boscowtx on May 22, 2011 6:50:36 GMT -5
Finally took the scooter for a ride, runs perfect, rode it for 30 miles, no sputtering! The mechanic replaced the CDI and cleaned the carb, told me the float was sticking. All perfect now, my only concern is the fuel filter. The is not hooked up, just a direct line from the tank to the vacume pump. Hate to mess with it, since the scooter is finally running great, but know it needs a fuel filter installed. What is the best way to prime the fuel filter?
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Post by Bluefront on May 22, 2011 8:21:29 GMT -5
^^^^^^Not necessary. Just get one on there if you want the jets to remain clean.....
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Post by sprocket on May 22, 2011 11:34:32 GMT -5
I use a Briggs and Stratton.. easy to get at a riding mower shop You don't need to prime the fuel filter.. Good filters you can look through Visu-Filters www.bikebandit.com/brand/visu-filterThey are designed for gravity and low pressure use, but the filtering is only about 75 microns Car filters are a no, no... they cause fuel shortages sometimes at WOT... Attachments:
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Post by TERRA NUVO on Nov 5, 2011 23:02:43 GMT -5
I have a high flow, but it now is very slow, a guy told me to add a little 2 cycle oil to the fuel, I don't think that clogged it, i think just general crap in the gas did. next time i will buy 3 of them., i used to be 90 percent filled, now it is 15 percent and god knows what at half throttle. Attachments:
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