would cracked or weak reeds make a motor lean?
- Thread starter jetster98
- Start date
SUPERTUNE
Race Gas Rules
- Location
- Clearwater Fl.
I think just the opposite...
norcal ex
X-H2
- Location
- San Jose, CA
I think they would make it lean... the pulse line would not be working very well.....thus not pumping the supply of fuel the motor needs.
masterblaster
X-H2
one of my cylinders has a weak reed and it runs more rich even with the low screw turned in leaner a half turn
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
Yes sir.
Absolutely the opposite.
The thing would be so fat with a broken or weak reed, it wouldn't even run on top end.
Don't ask how I know....
Brian
Last edited:
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
norcal ex
X-H2
- Location
- San Jose, CA
my stance on the issue is that the reeds can not atomize the fuel so it is just poured into the engine which makes it look like it is running rich but the pulse line is making it put less fuel in it then it would normally have.
hence one of the reasons there is no bottom end.. the pulse signal is so weak it doesn't start pulsing slightly until the higher RPMs
hence one of the reasons there is no bottom end.. the pulse signal is so weak it doesn't start pulsing slightly until the higher RPMs
What happens with a chip reed is that the carb will pick up a dose of fuel as the air passes the low speed circuit and it will pick another one when the reed blows it back up and another one again as the air enters the case. The pulse line just actuates the fuel pump .It is the carbs that actually meters the fuel. A blown through reed as is seen with a big piece gone would cause pulse problems.
atomization happens in the carbs not the reeds. Pulse signal is created for pressure differences in the engine case. Reeds do not effect this.
norcal ex
X-H2
- Location
- San Jose, CA
then whats the point of a 3 stage reed?
norcal ex
X-H2
- Location
- San Jose, CA
from my experience, the carbs start it and the reeds finish it.. same reason you ruff up the intake....
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
tried many different jets already even a different set of carbs w fatter jets. changed my cdi, and put my motor in my brothers ski to eliminate fuel lines that are bad. It ran just as lean in his ski. The motor has new seals in it and the case has been pressure tested/ no leaks. And the motor is pissing out water good! Getting ready to tear it apart and build it up with more H.P.
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
While I would be the wrong guy to steer you away from an engine build, it may not solve your problems and may make a "lean" condition worse, or worse than that, damage your new engine.
Brian
Brian
wsuwrhr
Purveyor of the Biggest Brapp
- Location
- Alta Loma, working in Upland
How about posting up what you are running and your setup and see what ideas come up.
im running stock motor stock head with limited b pipe. and right now im running 140 main and 70 pilot. About to run 147 main and 72.5 pilot and see what happens. Stock cdi is back in the ski. I had msd enhancer in it didnt know if that was the prob. but apparently not. cranking compression on my ski is 150 psi. it has good response and no bawgs at all. just lean!!!!!!