IS the year significant, or will any year Raptor 660 petcock work?  

odvelasc wrote on 03/10/09 at 18:03:00:

No you don't have to plug it to start, but unless you converted it to manual, you need to put it on prime.  only reason to plug it is in case it leaks later on.

odvelasc wrote on 03/10/09 at 18:44:25:



If you are setting up a new carb that may not work.  Once it is tuned you shouldn't touch the throttle but it is possible your slide is fully down and that won't allow it to start.  You can either lift it slightly with the twist grip or adjust the idle screw so it lifts the slide a little.  You may end up with a high idle that needs to be dialed back but it should get you started.  Also, have you confirmed you do have gas in the float bowl.  And lastly, depending on the model of VM they either had a pull knob on the choke or a push lever.  Which model do you have?  If it is the knob you need to pull up if it is the lever it will be a push down.  If you have the lever watch the mechanism, the other end of the lever should be lifting the plunger that will reside on the opposite side of the carb from the end you are moving.

odvelasc wrote on 03/11/09 at 06:39:05:


Loosen the float bowl drain to be sure there's fuel. If you've turned idle screw all the way in, it won't start. Loosen it so the slide's off the stop by about 1 or 2 mm which should be reasonably close. If the choke works, idle jet size or air screw position shouldn't be that important for the initial cold start. If it gets gas and you've started it with choke on for awhile maybe the plug's fouled at the moment and there may be a smell of gas at the exhaust.

Update on the bike. I got it to start. It popped and shut down immediately. I may be rich i was told. It started up twice, each time stumbled and  shut down with a stinky poof of air coming from around the air filter box (the seat is off).  Oh yeah, I lost the oil fill cap? I have it sealed with plastic wrap until the new one comes in. Maybe that is affecting it as well? I am going to check my spark plug tomorrow afternoon.

SV og LS wrote on 03/11/09 at 12:32:23:


Yeah it was all the way up. I am thinking that it may be a little rich. Perhaps I may need a pilot jet lower than a 17.5. I had a similar problem when my BS mikuni would die soon after start up. Turned out the plug was fouled beacuse the fuel mixture was to rich. I am thinking the same thing right now. I am gonna try leaning out the fuel mixture bit by bit after I check my plug and replace it.

SV og LS wrote on 03/12/09 at 04:12:43:


thanks SV will try3/4 choke first. I have a couple extra plugs lying around soo, if it is the plug than I will replace on saturday when I have time. Will update then.