Posts
179
Joined
1/27/2017
Location
Hollywood, MD
US
Fantasy
2773rd
So I got it new, it's a 2020, and it's been a pain to start, idle, and keep running from the first day. I've done some reading and went withthr JD carb kit and jetted for my elevation. But it's still hard to start, doesnt really idle, and today the fuel screw backed out. I guess that was probaly from my constant adjusting. This is my first four stroke, so maybe I'm missing something, but I've spent way more time just trying to get it running correctly, than actually riding. Anyone have any tips on the setup for this bike?
Paw Paw
Starting on carb'd 4-strokes is all about the pilot jet and the fuel screw adjustment. When those 2 are right, the bike will fire up easily every time. If either of those 2 are off, you'll kick until your blue in the face.
Since you've been messing with the fuel screw to the point that it's falling out, I am going to suggest you start there. Get an EZ-adjust aftermarket fuel screw (it's a crime they don't come with these stock) and reset it to the stock setting. Make sure you get the o-ring, washer and spring on correctly and make sure the stock o-ring is not stuck up inside there.
Also, remove the plug on the bottom of the float bowl, loosen the carb clamps, rotate the carb and get the pilot jet out and clean it. Make sure no small bits of dirt or debris are laying in the bottom of the float bowl plug.
Also, since this is your first 4-stroke, you have to know that starting technique is very important and much different than a 2-stroke. Keep your hand off the throttle when kicking!
When cold - engage the choke, kick through slowly until you feel the hard compression of top dead center (TDC), rotate the throttle twice so the accelerator pump squirts some fuel in, reset the kicker and give it a solid kick all the way through.
When warm - no choke and no hot-start, slow kick until TDC, then reset and solid kick all the way through.
When hot - same as warm except hold the hot start lever while kicking.
The Shop
Paw Paw
For cold starting I would follow FGR suggestions but another critical step is take your hand OFF the throttle when cold starting and place it on the throttle housing. On our bike, even the slightest bit of throttle and you could kick that thing all day long and it would not start.
Post a reply to: CRF150RB Carb setup help