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Post by camojeremy on Oct 3, 2013 8:51:06 GMT -5
I started my scooter to allow break-in after BBK left it for 10 minutes came back to it and it was off so naturally I went to start it again and it sounds like the bendix is free spining. I turned crank by hand it feels like it has compression.... is there a way to check engagement of the bendix? what caused it to go up in 10 minutes of not even cranking on it....
Also I installed a new rocker arm assembly and the vent to crank case is smoking alot.... is this just the chemicals for assembly burning off or something else to look for.... is that the reason it shut off and wont start again?
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Post by wilds on Oct 4, 2013 5:26:21 GMT -5
Maybe a bad battery... have you tried to kick start it?
Smoke might be a result of a leaking head valves. Piston rings not sealing properly
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Post by camojeremy on Oct 4, 2013 7:05:45 GMT -5
Battery tested fine, don't have kick start it broke. . . and the valves are set at .003 for both. . . and it's a new BBK with new rings compression is fine. . . any other ideas
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Post by urbanmadness on Oct 4, 2013 7:33:19 GMT -5
pull the belt cover and check it out.... see if the bendix is engaging the gear (it's a 50 so the starter is on the belt side, behind the variator)
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Post by camojeremy on Oct 4, 2013 10:27:21 GMT -5
Well I have found out that the bendix IS engaging. .. . but it got fuel, Spark, compression everything needed it was running great plug color but why die 10 minutes later and not start up again even days later. . . valves are set .003 on both is that to tight for a 47mm BBK with proformance head?
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Post by JerryScript on Oct 4, 2013 10:50:12 GMT -5
When you did your BBK, did you gap your rings? This is a long shot, but if you didn't gap them, they could have been too large, and once heated up they could have expanded and given you a soft sieze in that first 10 minutes, or damaged the sleeve.
Note - I wouldn't tear it apart unless someone with more experience here says to.
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Post by sailracer on Oct 4, 2013 10:53:30 GMT -5
no, not really, I set them to .004, but you're ok .will it turn over at all? Since you can't kick start it, you need to check out the bendix. take it out, snd see if you can turn it with your hand. It should extend one way and not the other. Check also the small gear on the starter nose. If you dont see a problem put it all together again and try again.
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Post by camojeremy on Oct 4, 2013 11:25:33 GMT -5
JerryScript- No didnt Gap ring just kind of assumed it would be right because even if it wasnt i didnt know how to fix it...but not seized im turning crankshaft by hand got compression but turns....
Sail Racer- Yeah thats what I did yesterday. took CVT cover off and using 8mm socket to hold it in place so I could see everything turning the way it should bendix engaged turning everything like it should...
I just dont know. . . almost done fooling with the damn thing. . . I really does have everything it needs but there is almost to many varibles to be able to check everything at once.... I keep tearing the motor apart every night and everytime I fix it some other weird problem presents. . . . very frusrating lol
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Post by alleyoop on Oct 4, 2013 12:03:56 GMT -5
Motor needs Fuel being sucked into the intake, Spark and Compression.
First check if its a fuel problem take the Vacuum line off going to your petcock hold it up and pour a teaspoon of gas down it and reconnect and IF it is firing it will attempt to start or start and die.
Second get a spare Plug pull the boot off the plug stick it In the boot hold it against the Valve cover and see if it is Sparking.
Third take the valve cover off bring it up to Top Dead Center as if your going to adjust the valves and Look at where the CASE POINTER is pointing to on the timing marks on the FLYWHEEL. It should point to the "T" or JUST BEFORE the "T". Since it is set RE-CHECK your Valve Gaps.
Last but not least check the compression, should be at the VERY LEAST 120PSI. If you do not have a compression gauage take the plug out and stick your finger in the hold and hold it nice and snuge and HOLD THE THROTTLE WIDE OPEN and crank it. If it has descent good compression it should push your finger off the hole.
Get back on which one is your problem.
Alleyoop
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Post by camojeremy on Oct 5, 2013 8:59:44 GMT -5
Ok well I checked fuel first which lead me to a compression issue... it has some form of compression but not enough vaccum to open petcock to allow fuel into carb so thanks but screwed I guess... time to break it down again. . .
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Post by creaseuk on Oct 11, 2013 9:29:23 GMT -5
If it ran and then stopped - its something simple. Opposed to "I ran it, it went BANG, now it doesn't run", which is a problem.
Did you check the hose is connected To the bottom of the carb. It needs to be connected to to that weird valve thingy bolted to the cvt cover, otherwise no vacuum .
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Post by camojeremy on Oct 12, 2013 11:15:14 GMT -5
I thought was fuel drain. . . ? but yeah it's connected....
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Post by alleyoop on Oct 12, 2013 11:55:33 GMT -5
LOL.. Sorry but that is funny,
Cameo, yes that is just your carbs drain hose. But before you tear down check the valves especially the exhaust valve. It may just be that it is tight and is a little open and that alone will cause low compression.
Alleyoop
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Post by tvnacman on Oct 12, 2013 12:07:14 GMT -5
did you recheck the valves as Alley suggested ? if so I would remove the carb and dump some fuel down the intake hole while cranking see if you get some sputter .
John
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Post by jjoshua20213 on Oct 12, 2013 15:30:02 GMT -5
I'd check the valves if I were you. Set them to .004. Make sure the adjusting nut is not coming loose. Sounds like a valve is stuck open a little and letting out some of your compression.
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jet
..BAD TO THE BONE..
