back together for the year- jetting

[Coupelx]

while it was torn apart this winter i did a basic clean up port on the cylinders (widened the exhaust a couple mm) i also put a timing plate at +5 on. before these 2 additions i was at 140 mains (this was verified on a dyno with a wideband to be correct). i put a 145 in there just to be safe the first time i started/rode it but it likes to bog out up top when i opened up the throttle. to big? should i try a 142.5 or go back to the 140. these are 28mm pwk carbs.

 

other specs are:

 

trinity head 18cc domes and 140-150 psi compression

vf2 reeds

kn in airbox/no lid

trinity stage iv pipes

[slc_hillshooter]

while it was torn apart this winter i did a basic clean up port on the cylinders (widened the exhaust a couple mm) i also put a timing plate at +5 on. before these 2 additions i was at 140 mains (this was verified on a dyno with a wideband to be correct). i put a 145 in there just to be safe the first time i started/rode it but it likes to bog out up top when i opened up the throttle. to big? should i try a 142.5 or go back to the 140. these are 28mm pwk carbs.

 

other specs are:

 

trinity head 18cc domes and 140-150 psi compression

vf2 reeds

kn in airbox/no lid

trinity stage iv pipes

 

 

Put your needles all the way down and see if that takes out the bog, I know it seems like its the main jet but it definitely sounds like the needle to me. If the bog gets worse then raise them all the way up. Seems like your midrange "blip" changed when you advanced the timing 5 degrees.