Started taking apart my engine today, got it completely stripped down today and got a few things done.
Started with basically a stock engine - boyesen reeds, exhaust mod, lighting coils removed and nukaru coils.
Get the crank welded
Get the crank/flywheel balanced
remove flywheel ring gear
get the head shaved 1mm
polish pistons, head, ports etc.
yamaha 70 carbs
D1 exhaust tuner
BR8 HIX plugs - Think these are correct for a shaved head?
Mikuni triple fuel pump (reliability not performance)
Here's the coils:
Here's the yam 70 carbs next to the standard D2 carbs:
They're the square bowl type. Very tight fit on the tohatsu! Had to shave a bolt to get them to squish together enough. Think these are automatic choke? Not sure how I'm going to the get that to work...
Another small problem - the 50hp carb bolts are too short, so I've had to order 90mm long ones.
I was speaking to fast fred before I started so I knew this one -
You have to use the link from the tohatsu 50 on the 70 carbs. The 70 ones aren't adjustable whereas the 50 ones are.
Another small job -
You can see the step at the back of the carbs, to take advantage of the extra diameter of the 70 carbs you have to open up the reed block.