Gearing 300ft

[Ieat4strokes]

On a 4 mill drag ported FAST motor where should I start with gearing on 300 ft dirt drags? I'm gonna be running a 8 inch arm with pro wedges in soft dirt clay like in sig pic. I'm around 190 lbs.

[sleeper06]

What tranny set-up do you run,1-4 pull I ran 15-39 but im set up for asphault with my straight cuts.I also ran a wheelie bar,screwed tires,lockout w/stiff tune

[J-Madd]

15/42 works pretty good.

[Ieat4strokes]

I'm still on stock tranny don't worry that's next but Jeff nodded the he'll out of it it shifts like butter.

[sleeper06]

Your bike will feel like it doubled hp with the tranny ,good luck

[AWR]

On a 4 mill drag ported FAST motor where should I start with gearing on 300 ft dirt drags? I'm gonna be running a 8 inch arm with pro wedges in soft dirt clay like in sig pic. I'm around 190 lbs.

the dirt you are running on in your sig looks identical to what we race on here.i ran between 14-40 and 14-42 with pro wedges but never had any luck with an 8 inch swinger.ended up with a 4 inch swing arm and 65inch wheelie bar.my tranny was uncut also but i cut 3 dogs off 3 thru 5.left in 2nd finish in 5th.was unbeaten in my class for 2 yrs with that combo(350 mod-any chassis,any fuel,no cut trannies,no aftermarket cylinders).at that time i weighed around 230....good luck

[BigRed350x]

No one can give you a good suggestion without knowing what ratio your primary's are. Do you have straight-cuts? If you do, then what ratio are your primary gears? It changes quite a bit when your primary gears change. Firehead custom made my straight-cuts and they sit at a 3.28 ratio which is stupid tall. I run 14x45 on my 10mil for 300ft with a 22" 14 paddle extreme.

[J-Madd]

Safe to say he's running stock primary gears. I doubt he would spend $350 (or whatever straight cut high ratio gears cost) before he bought an override, but I could be wrong

[J-Madd]

No one can give you a good suggestion without knowing what ratio your primary's are. Do you have straight-cuts? If you do, then what ratio are your primary gears? It changes quite a bit when your primary gears change. Firehead custom made my straight-cuts and they sit at a 3.28 ratio which is stupid tall. I run 14x45 on my 10mil for 300ft with a 22" 14 paddle extreme.

 

 

What r/o tire do you have? What is your 60 ft times? Man my Cub blows 72 r/o 14 pdl extremes off all the way down the track with me on it (185 lbs). I don't see how you can get that thing down the track with those tires unless they are 80+ r/o!!

[Ieat4strokes]

Yea I hop i didnt go too long on the arm, i know in the yard she blows the tires all the way across my backyard, prolly a good 300ft. Have to wait and see how she does at the track, i have wedges and paddles to try.

 

 

No one can give you a good suggestion without knowing what ratio your primary's are. Do you have straight-cuts? If you do, then what ratio are your primary gears? It changes quite a bit when your primary gears change. Firehead custom made my straight-cuts and they sit at a 3.28 ratio which is stupid tall. I run 14x45 on my 10mil for 300ft with a 22" 14 paddle extreme.

Primarys are stock, havent gone full all out drag as of yet, i still ride it "recreationally" as well, comp here isnt that stiff to ONLY drag it...lol

 

 

Safe to say he's running stock primary gears. I doubt he would spend $350 (or whatever straight cut high ratio gears cost) before he bought an override, but I could be wrong

No need for confusion J, your correct.

[tundish2800]

I ran 14/41 on a stock cylinder 4mil. The bike weighs 350 and i weigh 245 i was running 4.83@68mph spinning the whole way down the track. I only had ten paddles on last year this year i have 12 paddles.

[Ieat4strokes]

Thanks. I think Ima need more paddle ad well. I have wedges and 10 paddle extremes.

[firebanshee]

15/42 works pretty good.

 

X-2

[brave&crazy racing]

try 15 45 to 15 47 leave in 2 works on my 4 mill stocker by a&s with pw1. i am 175

[Ieat4strokes]

thanks fellas.....appreciate it