will a pwm38mm carb work
- Thread starter kx80berger
- Start date
mine measures out at 27.94mm would that not be considered a 28mm (inside bore at reed side)
my other 200 2 stroke runs a 35mm pkw ..but it has a power valve
well they have givin their opinions which are all no, now its up to you to decide
Stay away! Yeah, you might be able to get it to fit, but one that big will be Hell to get tuned properly. Most likely the engine will never run right with a carb. this size installed. I'd save your money for whenever a good deal on a 28mm PWK comes along. This carb. fits right in the stock intake boot and is a nice upgrade...
Basically, it's a matter of intake velocity. Your engine wants to draw a finite amount of air for its displacement. As that air goes through the carb (which is a restriction) it has to speed up to go through the carb throat. For equal engine speeds, the same amount of air must go faster to go through a smaller carb, or slower through a large carb. Of course, to a certain extent, a bigger carb means less restriction and more flow, which is why a bigger carb is better for wide open throttle applications like drag racing. The draw back is that when you get too large of a carb, you no longer have enough velocity to create an adequate vaccuum in the carb throat to pull fuel out of the float bowl. The result is a lean condition (like AWK said).
A larger engine or more efficient engine (ported) can succesfully make use of a larger carb (up to a point) because it can achieve the intake velocity to make use of it, but even so, there is a loss of throttle response traded off for the higher flow. That's why there is a limit to how big you can go. Power is great but so is throttle response, so you shoot for a balance that gives you an acceptable amount of both. For a Blaster, the upper limit seems to be about 36mm for a highly modded engine (barring single purpose drag bikes). Yeah, you can use a bigger carb, but you won't be happy with it.
(Geez, is it just me or was that kinda long winded?)
A larger engine or more efficient engine (ported) can succesfully make use of a larger carb (up to a point) because it can achieve the intake velocity to make use of it, but even so, there is a loss of throttle response traded off for the higher flow. That's why there is a limit to how big you can go. Power is great but so is throttle response, so you shoot for a balance that gives you an acceptable amount of both. For a Blaster, the upper limit seems to be about 36mm for a highly modded engine (barring single purpose drag bikes). Yeah, you can use a bigger carb, but you won't be happy with it.
(Geez, is it just me or was that kinda long winded?)
thanks for the time you put in to the write up bro reps given if i win it it will be put on a differnt bike
