Needles/Jets?

Not A 'Berg Question As Such,But I'd Like To Pick The Brains Of The Carby People Here. :wink:
I Need To Richen Up The Settings On My VOR 450.
How Can You Tell What Needle To Use,What The Numbers/Letters To Look For When Going Richer/Leaner? :?
I've Drilled The Side Number Plate To Aide Air Flow Into The Carb,Sound Deeper And Revs Quicker And Harder But It Just Lacks That Fat Mid Range Bit If You Know What I Mean,Bottom And Now Top Seem Ok,Just Starts To Lift The Wheel In Second And Third Then The Power Just Flattens Out. :roll:
If This Was A 'Berg What Would You Do First,Needle+Clip Position? Main Jet? Pilot?
It Runs An 39FCR As Standard.

Thanks For The Reply Taffy,Heres The Setting Straight From The Owners Manual,Hope Theses Make Sense Since Its A Straight Translation From Italian

Max Jet 175
Min Jet 50
Starting Jet 85
Max Air Jet 200
Min Air Jet 100
Idle Screw 1-1 1/2 Out
Noozle Needle 0.35
Jet Needle OBDTM
Clip Position 2

I Was Thinking Of Going To A 45 Pilot 185 Main And 4th Clip And Altering The Pump Timing To Around 1 Second.
How Do I Find Out Which Model FCR I Have Regarding The Pump Mod?
How Different Is Dales Needle In Comparison With This One?

Right,After Changing The Clip Position Lower 2 Places And Changing The Main To A 180,Pilot To A 45 And Altering The Squirt To Around 1 Second,Fuel 2 Turns Out,All Seems Ok With Mid And Top,No More Bog,But Cruising A 1/4 Throttle It Now Stumbles Horibly. Any Ideas.

The Main And Pilot Were 178/42 So Somebody Had Been Playing Before.

The Bog Was From Around 1/4 Thottle And Up,Example,Riding Through The Woods,3rd Gear At 1/4t And Along Comes An Incline,Open To 1/2t And Instant Bog Then Takes Off. Then Later 1st/2nd Gear In The Tight Bits,Need To Lift Front Over Logs And Roots,Big Blip On Throttle To Wheelie Over Then Bogs No Lift Then Savage Wheel Spin.

The Clip Is Now On #4,Went 1 Size Bigger On Main+Pilot,Mid And Top Feels Fatter If You Know What I Mean???.
Dont Know What FCR I Have,But There Isnt Any Rods To Alter,Only A Quadrant With A Screw And Spring,Turning Outwards It Would Squirt For Nearly 9 Seconds,Turning Inwards It Squirt For Less That 1 Second.
It Would Start When Slide Was Around 2-2.5mm Open.
Pulling Away Is Slightly Different Now,A Little Slower Than Before,But I Think Thats More To Do With The Larger Pilot,Whacking Open The Throttle From Around 1/3 To Full Theres No Real Bog Anymore.
A Little More Playing I Think.
I Have 168 Main That I Could Try As Well:?:

Taffy said:

the 168MJ; yeh-i'd try it! why not!


regards

Taffy

Click to expand...

Thats Easy For You To Say........You Really Need To See What Has To Be Taken Off To Get To The Carb!!! 8O 8O 8O 8O :lol:
I'll Play On Saturday Once I've Sorted Out My Car And Bring Home My Carb Special Tools From Work To Try And Get To The Jets With Out Taking The Carb Off.

Do You Recon I Need To Get A 35,38 And 40 Pilot As Well?

Right I Went Down To A 170 Main And Back To 42 Pilot.Didnt Do The 168 Because I Havnt A Smaller Pilot,Seems To Really Snap Now,Still Got A Little Bog Though,But Its Very Slight. Stumbles Nearly Gone.
What I Plan On Doing Is Changing To A MX Cam And Either A MX Silencer Or Free Flowing After Market System, As The Std Cam Pulls Very Strongly Of Bottom Then Starts To Fade At Mid And Top Struggles. Can Be Quite A Handful In The Tight Stuff.

When This Is Done Whats Your Thought On A 165 Main And 38 Pilot?
Seeing As The Engine Will Be Breathing Better?

I Know It Hard To Say Without Trying But You All Have Much Better Understanding Of These Things.

Sorry Its Not A Berg Question :roll: