I have the 88cc and am running 15t up front, stock rear. i want a little more top, but dont want to lose too much bottom end, so do you think a 38 rear will run good with the 15 up front?

thanks

 

i thought a 37 was stock on a fiddy?? if thats the case (i could be wrong), a 38 would lower yer gear ratio making u slower on the top.

 

well if i run a 16/38, would that give me overall more low end or top end than stock? what about 15/38?

 

Go down to a 35 on the rear...... I'm running 15 front 35 rear and its just right for top speed and remaining nice for wheelies.

 

What if i go to a 16 up front with 38 in the back? wouldnt that almost be the same as 15/35?

 

In theory ... yes

 

do the math..

38 devided by 16 = 2.375 ratio

35 devided by 15 = 2.333 ratio

so the 16 and the 38 would be a little slower up top.

 

that bike is still PULLING way to hard! but if you like to do really easy wheelies for days....go for it.

I would do a 17 front!!

 

I would go up to a 16 tooth countersprocket , but I'm installing a 70cc head and mild race cam which might Rob me of a little bottom end and mid-range oomph. After I see how it runs with the cam and 70cc head I'll go up in front or stay the same. The race cam will allow the motor to rev higher and the head will allow it to breathe better so I assume I'll get another 5 mph top end with the gearing I'm running now. My bike tops out at about 44 mph now, 5 more will be almost 50 mph. I don't need a 50 that goes faster than 50.

..........



wait a minute.........yes I do.

 

i hope u got a piston to go along with that head. im sure u know better but the piston u have now will not give u enough compression to make it worth your while.

 

I already bought it..

Come on ..give me some credit.

 

just makin sure u dont make a mistake bro.

 

fab 5 you r the new DR. 50.... show us know nothing how to tune the isht out of a 50!!!!

 

hey i try man. i hate not bein able to do somethin. thats what forums are for. i eat, breath, and sleep fiddys. y not spread the disease? ask and i shall tell.

 

i was going to go up in the front but since i have taller tires now, and i can't even fit my pinky in between the tire and swingarm, i'm hesitant to go up just b/c i don't wanna rub. i'm thinking i might just go down 2 or 3 in the rear. does the same concept apply that 1 down in the front = 3 up in the rear and vice versa? that's how sportbikes work so i wasn't sure if it was the same.
B