installed BBK, No start By lacrosseguy (Read 1,164 times)

[lacrosseguy]

if i have time im going to check my spark, because i dont think im getting it.

[lacrosseguy]

Okay, did a spark and compression test one more time.
I had great spark after changing my boot. i did a compression test and it blew my finger off.
im thinking possibly a starter problem ?
heres a video

[Alleyoop]

Ok, after cranking like that and it is not firing take the PLUG out and see if it is WET or DRY.
If WET that means the plug is NOT FIRING IF DRY no fuel is being sucked into the intake.

Also have you checked the timing and adjusted the VALVES?
Alleyoop

[Alleyoop]

I re-read your previous posts,
Take the Vavle cover off and align the CAM SPROCKET as if your going to adjust the VALVES(the two little holes lined up with the top of the head.


And then take a picture of your FLYWHEEL I want to see where the timing is set.
Alleyoop

[lacrosseguy]

20130603_145845 by TreWalker26, on Flickr

20130603_145837 by TreWalker26, on Flickr

20130603_145818 by TreWalker26, on Flickr

20130603_145809 by TreWalker26, on FlickrTreWalker26, on Flickr

20130603_145757 by TreWalker26, on Flickr

20130603_145734 by TreWalker26, on Flickr

20130603_145722 by TreWalker26, on Flickr

sorry for the obsessive amount of pics

[Alleyoop]

Here is how the Lower Chain goes in and there is a tab on the guide which fits into the SLOT on the right of the head.

www.scooterdoc.proboards.com/index.cgi?board=techtips&action=display&thread=6884&page=3

The timeing Is at TDC BUT I QUESTION the PICKUP COIL it looks in bad shape which may be the problem.

You can get one at Scrappydogs look in the section for your motor size:

[lacrosseguy]

could my pick up coil cause me not to start ? what does installing a new one consist of ?
ill post my timing with a video tomorrow.

[Alleyoop]

Yes, that is the coil that sends a signal to the CDI to tell the CDI to release the voltage to the coil to fire the plug. And all it takes is two little bolts and plug it in 5 minute job you do not even have to take the flyhwheel off. As the Flywheel rotates the pickup coil picks up juice and sends it to the CDI.
Alleyoop

[Alleyoop]

Did you put in the lower chain guide?
Alleyoop

[lacrosseguy]

Could you send me a link to one ? And yes I got the lower guide in , that tutorial helped out a lot !

[Alleyoop]

If your motor is a 139qmb here it is SCROLL down you will see the TRIGGER PICKUP
Alleyoop
www.scrappydogscooters.com/Replacement_Parts.html

[lacrosseguy]

And that's what you think the problem is ? Also does a air filter replace the air box?

[Alleyoop]

Hard to tell, since it never was running before, and it looks like an old scoot and in bad shape. So it could even be the STATOR as well BUT unless you have a MULTI METER and test them you will have to replace parts until you hit the right one.

You could switch out the AIR BOX for just an AIR FILTER but do not do that until you get the scoot running. That is a mod which allows a lot more air in so you will have to adjust the carb to feed it more fuel maybe even have to put in a bigger MAIN JET.
Alleyoop

[lacrosseguy]

mhm. okay, and my air box is trashed .

[lacrosseguy]

oh and it was running last fall, sorry if i didnt make that clear. it bogged out at a stoplight and never started again

do i need to get a "positive crankcase ventilator" if i get a air filter? i wasen't going to install until after i got it started, but my airbox is falling apart .