Help with need Carb for 250r
#1
I been messing with my Carb (stock Keihin) ever since I got my R and instead of trying to fix it I just figure I'll get a new one. It leaks gas everywhere and has a real hard time idling. What is the biggest I could go, my bike is ported has and FMF fatty pipe and K&N filter with boyseen reeds. Do you lose bottom end torque going big on the carb. Thanks.
#2
What kind of riding do you do? GENERALLY speaking, the bigger the carb, the better the top-end (while sacrificing some bottom end). If your riding mx or woods, 38mm would be MAX, IMHO. 36 or 37 would be a better choice (more bottom end and crisper throttle response). Keep in mind that the reed cage has a large effect on the performance also. Try to choose the correct type of reed cage for your application.
lump-dog, esr
lump-dog, esr
#4
I just got a 38mm Keihin carb for my R. I can not find a throttle cable anywhere in Oregon. Does anyone know where I could order one on-line or anything? Also trx250rob, my friend and I both just got 38mm carbs and they kick ***. I've been borrowing a throttle cable and it just got taken back. I need a new one bad.
#6
Motion Pro cable part numbers:
Stock thumb throttle to "aftermarket" Keihin carbs(other than the stock Keihin carb) part number 021-910
Motion Pro "turbo" twist throttle to "aftermarket" Keihin carb part number 021-912
Magura "Duo" twist to "aftermarket" Keihin 657-902B
For MX and aggressive riding I reccomend using a 35mm PWK bored to 36mm's or for a more experienced and very aggressive rider, a ported engine, a 38mm Air Striker. Big bore for MX gets the 38 A/S too.
38mm Air Striker for ported 250-295cc engines in the dunes. 250-295 hillracing and drag racing 39.5mm Air Striker(bored version of 38mm).
For big bore(310cc+) for dunes 39mm PWK, for hillracing and drag racing 40mm+.
Stock thumb throttle to "aftermarket" Keihin carbs(other than the stock Keihin carb) part number 021-910
Motion Pro "turbo" twist throttle to "aftermarket" Keihin carb part number 021-912
Magura "Duo" twist to "aftermarket" Keihin 657-902B
For MX and aggressive riding I reccomend using a 35mm PWK bored to 36mm's or for a more experienced and very aggressive rider, a ported engine, a 38mm Air Striker. Big bore for MX gets the 38 A/S too.
38mm Air Striker for ported 250-295cc engines in the dunes. 250-295 hillracing and drag racing 39.5mm Air Striker(bored version of 38mm).
For big bore(310cc+) for dunes 39mm PWK, for hillracing and drag racing 40mm+.
#7