carb clean and shimming 86 ninja 250

james250ninja · August 27th, 2014, 07:50 PM

hi everyone

can I shim my 250 im goanna leave it stock and how many washer..??

also I cleaned my carbs real good change my vacuum diaphragm I used one from 2000 ninja 250 great condition EVERYTHING PUT BACK TOGEATHER PROPERLY

question MY BIKE RUNS GREAT BUT SLIGHT LEAN WHILE DRIVING IS IT POSSIBLE TO HAVE YOUR BIKE DRIVE SLIGHT LEAN AFTER GOOD CARB CLEAN

OH I DID USE ONE WASHER TO SHIM, JUST WANT TO MAKE SURE U CAN SHIM A STOCK BIKE

jkv45 · August 28th, 2014, 06:57 AM

Generally they all benefit from running a little richer than stock in the mid-range. 1 or 2 shims is about right.

Did you adjust the idle mixture screws? They are set lean from the factory also. If you feel it's lean at smaller throttle openings, that's what you need to adjust.

Start at 2 1/2 turns out on the screws. You can also adjust for the highest RPMs, then go just slightly richer (1/8 out or so).

Chances are the carbs need to be synced. If they are not synced no amount of adjusting will get you good results.

james250ninja · August 28th, 2014, 07:33 AM

everything stock carbs were synch,

though someone drill out the idle mixture caps..

August 27th, 2014, 07:50 PM	#1
james250ninja james250ninjette.newbie Name: james Location: cherry hill, nj Join Date: Mar 2010 Motorcycle(s): 1986 ninja 250 Posts: 276	carb clean and shimming 86 ninja 250 hi everyone can I shim my 250 im goanna leave it stock and how many washer..?? also I cleaned my carbs real good change my vacuum diaphragm I used one from 2000 ninja 250 great condition EVERYTHING PUT BACK TOGEATHER PROPERLY question MY BIKE RUNS GREAT BUT SLIGHT LEAN WHILE DRIVING IS IT POSSIBLE TO HAVE YOUR BIKE DRIVE SLIGHT LEAN AFTER GOOD CARB CLEAN OH I DID USE ONE WASHER TO SHIM, JUST WANT TO MAKE SURE U CAN SHIM A STOCK BIKE

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August 28th, 2014, 06:57 AM	#2
jkv45 Rev Limiter Name: Jay Location: WI Join Date: Jul 2013 Motorcycle(s): '06 SV650n, '00 Derbi GPR, '64 CA77 Dream 305, '70 CL450 Scrambler, numerous dirt bikes Posts: A lot. MOTM - Jun '18, Oct '16	Generally they all benefit from running a little richer than stock in the mid-range. 1 or 2 shims is about right. Did you adjust the idle mixture screws? They are set lean from the factory also. If you feel it's lean at smaller throttle openings, that's what you need to adjust. Start at 2 1/2 turns out on the screws. You can also adjust for the highest RPMs, then go just slightly richer (1/8 out or so). Chances are the carbs need to be synced. If they are not synced no amount of adjusting will get you good results.

August 28th, 2014, 07:33 AM	#3
james250ninja james250ninjette.newbie Name: james Location: cherry hill, nj Join Date: Mar 2010 Motorcycle(s): 1986 ninja 250 Posts: 276	everything stock carbs were synch, though someone drill out the idle mixture caps..