help have 4mm stroker bought timing plate where do i set it on there

[runger]

Help i bought a adjustable timing plate and i have a 4mm stroker and i need to know where to set it on the plate for timing

[yamaha04]

+4 or +5 i guess if you have a cub they like timing but for stock, ported cylinders iv always seen people run +4/5

[runger]

+4 or +5 i guess if you have a cub they like timing but for stock, ported cylinders iv always seen people run +4/5

 

 

I have 180 lbs in both clylinders there ported 18cc dome with cool head and a 4mm storker 5mm long rod at 66mm bored and the machinist is asking because there are marks on new plate but that is for stok no for a stroker

[yamaha04]

ok im not quit following you but i will try this again. when you put the plate on there should -10-9-8-7-6-5-4-3-2-1,0+1+2+3+4+5+6+7+8+9+10 so when your adjusting it you line whatever # you want to set it at you line it up with the case halfs when they come together so turn the plate till the +5 lines up with the line that the case halfs makes then tighten it down.

[dajogejr]

I have 180 lbs in both clylinders there ported 18cc dome with cool head and a 4mm storker 5mm long rod at 66mm bored and the machinist is asking because there are marks on new plate but that is for stok no for a stroker

 

Timing marks are timing marks, regardless of the stroke. However...whatever your engine builder recommends for timing is what should be followed. The stroke is longer, but the crank key and flywheel position are the same, the pickups hit the coil at the same time, etc. I personally would set it at 4 or 5 and start there.

Obviously, with that much compression and timing you'll want race fuel.

 

I generally like more timing for shorter runs, less for longer runs... More timing and compression = more heat....

[runger]

ok thats guys ill try it

[Hilarious]

Set it a +5. It should run good there. :teehee: