Re: alittle encouragement needed
Generally, 4 strokes dont require as drastic changes in jetting as 2 strokes do. However, if you removed the lid, you will need to get excessively more rich.
When you say modified, did you drill holes, and install those 1" foam vents or?
Also, a problem ive encountered when saying jetting sizes, is how people refer to them. Mikuni main jets go in increments of 5 IE: 370, 375, 380. So is it one size frm 370 to 375 or 5 because of 5 numbers?
On Kehin carbs, main jets go in numeric individual order IE: 138,139,140,141.
In addition to that, i understand that the Raptor has "2 sizes larger main jet" in one carb. So being Mikuni carbs, i would have to assume that is 10 numbers richer.
Without knowing what jets are in the Raptor to start with and assuming sea level heres what i say:
With the pipe and 1" holes drilled in the lid of the box, go up one size(5 numbers) for example.
With the pipe and NO lid on the box, i would go up 4 sizes(20 numbers).
Let me know how it turns out.
What style paddles did you run on it? Ive never ridden a 4 stroke with paddles. Would be interesting.