The 350 kit will be 351.3 cc

 

Very cool a 351 Cleveland for my KLX. Those were the days.

 

Due to the increased suction of the bigger bore a drop in jetting will be required.

 

That one passed above my head. Can you enlighten me on what that means, Sir?

 

From the increase in bore size you actually get more pumping draw and actually have to drop the main jet size due to the cylinder will actually pull more fuel out of the jet so you will get a rich condition instead of lean.

 

Ok, I should have read your original post more closely. I thought I had read 'drop-in' jettting, when you actuall wrote 'a drop in jetting' (no hyphen).

My mistake; makes sense now.

 

thats interesting.... you have the 340 kit right? did you have to do this for that cylinder?

 

Yes I have a 340 and had to do this. When ever you increase V/E on pulling side (piston) you will have to do this. This doesn't apply to uncorking the stock cylinder due to how bottled up they are from the factory.

 

How's the G450x holding-up?

 

I'm thru the 20 hr service now and run it on the 51 hp setting its a monster. I've got it apart doing some stuff for the spring the engineering on this thing is pretty impressive.