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Looking fir advise on where to start jetting


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This is just a WAG.

needles middle clip

27.5 pilots

280 mains

1.5 turns out on the airscrews from fully seated.

Do Not Over Tighten the airscrews!

Just seat them, take note of the screw head slot and turn them out 1.5 turns.

They should be the same.

Do you still have TORS?

Make sure your carb slides are sync'd.

 

The bottom end is going to suck with CPI In Frame Drag Pipes.

You will have to slip the clutch more to keep the stock port motor on the pipe.

 

I can't imagine you're riding trails with this pipe set-up, but stranger things have happened.

 

If you are riding dirty/muddy wet areas?

 

Do you plan on keeping the airbox and lid?

If so, get the Pro-Design billet intake kit that fits in the airbox and allows you to replace that stock POS stock filter set-up with a K&N Filter and an Outer Wear.

http://www.farmandsandtoys.com/partdetail.asp?partid=457

 

If you do not ride in dirty/muddy areas, then get two K&N Filters and Outer Weasrs for the stock carbs and remove the entire airbox entirely.

http://www.farmandsandtoys.com/partdetail.asp?partid=330

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  • 3 weeks later...

well i did the install today

 

cpi small bores

vforce 4's

uni drop in

290 mains

27.5 pilots

 

as someone mentioned, the bottom end is sluggish but it pulls like a raped ape in powerband

idle is perfect as well

 

would changing anything on the mains help me with the low end, i have 310's i could slap in real quick

 

i understand the pipes are killing me but why not ask

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No worries, just trying to learn here

 

I understand these pipes aren't designed for what I'm doing

 

I have not moved the needle yet ethier

 

Would that or is that still necessity?

 

I'm okay with it as it is really

 

I also have a +4 timing plate I need to install, maybe that'll do something

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The timing will get you some bottom end back. Also, a new head and domes will help liven it up a bit. Maybe have a stock head milled and re chambered by mull. Just order a used one online and drop ship it

I always read different thing regarding timing plate. Some say it will give more top end and others say it will give more bottom.

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^ timing gets the bike low end. Excessive timing up top makes the motor fight itself and won't rev out as well. This is why guys with programmable ignitions set up curves with heavy advance early on, and then retard the timing further up in the revs.

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^ timing gets the bike low end. Excessive timing up top makes the motor fight itself and won't rev out as well. This is why guys with programmable ignitions set up curves with heavy advance early on, and then retard the timing further up in the revs.

So does adding a timing plate sacrifice top end?

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