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New Project Bike: '99 YZ400f

bwdmax

Forum Supporter
Joined
Oct 20, 2010
Messages
1,811
Location
Victoria
First Name
Gary
Last Name
Turner
If you don't get a response try moving the intake cam one tooth CCW. The intake is retarded right now and may still be open when the piston starts back up on compression stroke pushing part of the air fuel charge back into the intake/ carb. Just be sure and roll it through by hand after the change with the plug out to check for any tight spots.
 
Joined
Jul 15, 2018
Messages
122
Location
US
First Name
Trevor
I just pulled the plug so I could feel the engine by hand. It's not easy to turn by any means but I can make it turn by hand, and I don't feel any irregular tight zones.

I'm thinking this might be fuel related. When I cleaned the carb, I just went through the Jets and accelerator pump. Maybe there's some blockage in the body of it. I'll do some testing and/or cleaning to see if it's fuel related.

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