90 carbs on a 70 yam

[bloodline]

Any suggestions on the jets? Motor has a hydrotec rec head on it. No airbox.

[Fast Fred]

160 take the choke plates out

[Boatnut]

Then wot do for cold starts? Rag over carb? add a primer squirt? a shot from a bottle of petrol in each carb? which is best? got to take choke plates out of mine.Is this a hijack? I hope it's not a hijack, sorry if it is

[Fast Fred]

use a flap wheel to open up the intake, make it the same size as the 90hp carb bace gasket.

witch ever choke you like best,

[Fast Fred]

i like the shot from a squeeze bottle, Dragster style

welded crank, ya should have one of them

[bloodline]

Thanks for the help.

[bloodline]

took the 90 carbs apart a bit ago. Stock jet is 165. Removing the silencer box and you still say 160? With a 150 psi head?

[Fast Fred]

160, yes. if you are guna spin it up past 6000 and hold it, max timin has to go DOWN or she Will detonate right in front of the exhaust port window.

you will have to make a new throttle cam, think may have a shot or two of said setup.

[Fast Fred]

[Fast Fred]

them is the premix carbs, the other ones work as well. on the pre mix carbs, you have to put counter sunk screws in the top of number 2 and 3.